diff --git a/cspell.json b/cspell.json
index 38290ba4..3f0ddaae 100644
--- a/cspell.json
+++ b/cspell.json
@@ -65,6 +65,7 @@
     "sqltag",
     "storyshots",
     "tailwindcss",
+    "Twicasting",
     "unfetch",
     "unmount",
     "unoptimized",
diff --git a/packages/@neet/vschedule-api-spec/package.json b/packages/@neet/vschedule-api-spec/package.json
index 09c3f4d1..8d025fb9 100644
--- a/packages/@neet/vschedule-api-spec/package.json
+++ b/packages/@neet/vschedule-api-spec/package.json
@@ -12,7 +12,7 @@
     }
   },
   "devDependencies": {
-    "@asteasolutions/zod-to-openapi": "^3.0.0",
+    "@asteasolutions/zod-to-openapi": "^3.1.0",
     "@neet/eslint-plugin-vschedule": "workspace:^",
     "@neet/tsconfig-vschedule": "workspace:^",
     "@types/eslint": "^8.4.10",
diff --git a/packages/@neet/vschedule-api-spec/src/components/parameters/PathChannelId.ts b/packages/@neet/vschedule-api-spec/src/components/parameters/PathChannelId.ts
new file mode 100644
index 00000000..ddfc2699
--- /dev/null
+++ b/packages/@neet/vschedule-api-spec/src/components/parameters/PathChannelId.ts
@@ -0,0 +1,8 @@
+import { z } from 'zod';
+
+import { registry } from '../../api';
+
+export const PathChannelId = registry.registerParameter(
+  'PathChannelId',
+  z.string().openapi({ param: { name: 'channelId', in: 'path' } }),
+);
diff --git a/packages/@neet/vschedule-api-spec/src/components/schemas/Actor.ts b/packages/@neet/vschedule-api-spec/src/components/schemas/Actor.ts
index c2125c5c..ceaa4648 100644
--- a/packages/@neet/vschedule-api-spec/src/components/schemas/Actor.ts
+++ b/packages/@neet/vschedule-api-spec/src/components/schemas/Actor.ts
@@ -1,6 +1,7 @@
 import { z } from 'zod';
 
 import { registry } from '../../api';
+import { Channel } from './Channel';
 import { MediaAttachment } from './MediaAttachment';
 
 export const Actor = registry.register(
@@ -14,5 +15,6 @@ export const Actor = registry.register(
     avatar: MediaAttachment.optional(),
     twitterUsername: z.string().nullable(),
     youtubeChannelId: z.string().nullable(),
+    channels: z.array(Channel),
   }),
 );
diff --git a/packages/@neet/vschedule-api-spec/src/components/schemas/Channel.ts b/packages/@neet/vschedule-api-spec/src/components/schemas/Channel.ts
new file mode 100644
index 00000000..ca5c637f
--- /dev/null
+++ b/packages/@neet/vschedule-api-spec/src/components/schemas/Channel.ts
@@ -0,0 +1,45 @@
+import { z } from 'zod';
+
+import { registry } from '../../api';
+
+export const BaseChannel = registry.register(
+  'BaseChannel',
+  z.object({
+    id: z.string(),
+    name: z.string(),
+    description: z.string().nullish(),
+  }),
+);
+
+export const YoutubeChannel = registry.register(
+  'YoutubeChannel',
+  BaseChannel.extend({
+    type: z.literal('youtube'),
+    url: z.string().url(),
+  }),
+);
+
+export const TwitchChannel = registry.register(
+  'TwitchChannel',
+  BaseChannel.extend({
+    type: z.literal('twitch'),
+    url: z.string().url(),
+  }),
+);
+
+export const TwicastingChannel = registry.register(
+  'TwicastingChannel',
+  BaseChannel.extend({
+    type: z.literal('twicasting'),
+    url: z.string().url(),
+  }),
+);
+
+export const Channel = registry.register(
+  'Channel',
+  z.discriminatedUnion('type', [
+    YoutubeChannel,
+    TwitchChannel,
+    TwicastingChannel,
+  ]),
+);
diff --git a/packages/@neet/vschedule-api-spec/src/components/schemas/Stream.ts b/packages/@neet/vschedule-api-spec/src/components/schemas/Stream.ts
index 8022815d..6a9acf7c 100644
--- a/packages/@neet/vschedule-api-spec/src/components/schemas/Stream.ts
+++ b/packages/@neet/vschedule-api-spec/src/components/schemas/Stream.ts
@@ -12,12 +12,13 @@ export const Stream = registry.register(
     url: z.string().url(),
     description: z.string().nullable(),
     thumbnail: MediaAttachment.optional(),
+    channelId: z.string(),
     createdAt: z.date(),
     updatedAt: z.date(),
     startedAt: z.date(),
     endedAt: z.date().nullable(),
     duration: z.string().nullable(),
     owner: Performer,
-    casts: z.array(Performer),
+    participants: z.array(Performer),
   }),
 );
diff --git a/packages/@neet/vschedule-api-spec/src/paths/rest/v1/channels.ts b/packages/@neet/vschedule-api-spec/src/paths/rest/v1/channels.ts
new file mode 100644
index 00000000..835e5f25
--- /dev/null
+++ b/packages/@neet/vschedule-api-spec/src/paths/rest/v1/channels.ts
@@ -0,0 +1,21 @@
+import { z } from 'zod';
+
+import { registry } from '../../../api';
+import { PathChannelId } from '../../../components/parameters/PathChannelId';
+
+registry.registerPath({
+  method: 'post',
+  path: '/rest/v1/channels/{channelId}/subscribe',
+  operationId: 'subscribeToChannel',
+  summary: 'チャンネルを購読',
+  request: {
+    params: z.object({
+      channelId: PathChannelId,
+    }),
+  },
+  responses: {
+    200: {
+      description: '成功時のレスポンスです',
+    },
+  },
+});
diff --git a/packages/@neet/vschedule-api-spec/src/paths/rest/v1/performers.ts b/packages/@neet/vschedule-api-spec/src/paths/rest/v1/performers.ts
index 91ae70b8..3e280170 100644
--- a/packages/@neet/vschedule-api-spec/src/paths/rest/v1/performers.ts
+++ b/packages/@neet/vschedule-api-spec/src/paths/rest/v1/performers.ts
@@ -44,23 +44,3 @@ registry.registerPath({
     },
   },
 });
-
-registry.registerPath({
-  method: 'post',
-  path: '/rest/v1/performers/{performerId}/subscribe',
-  operationId: 'subscribeToPerformer',
-  summary: 'パフォーマーを購読',
-  request: {
-    params: z.object({
-      performerId: PathPerformerId,
-    }),
-  },
-  responses: {
-    200: {
-      description: '成功時のレスポンスです',
-      // content: {
-      //   'application/json': { schema: Performer },
-      // },
-    },
-  },
-});
diff --git a/packages/@neet/vschedule-api-spec/src/paths/websub/youtube.ts b/packages/@neet/vschedule-api-spec/src/paths/websub/youtube.ts
index 01b9e4cc..c5bb7f91 100644
--- a/packages/@neet/vschedule-api-spec/src/paths/websub/youtube.ts
+++ b/packages/@neet/vschedule-api-spec/src/paths/websub/youtube.ts
@@ -56,7 +56,8 @@ export const YoutubeAtomFeed = z.union([
 export const YoutubeWebsubVerification = z.object({
   'hub.topic': z.string().url(),
   'hub.challenge': z.string(),
-  'hub.mode': z.union([z.literal('subscribe'), z.literal('unsubscribe')]),
+  // 'hub.mode': z.union([z.literal('subscribe'), z.literal('unsubscribe')]),
+  'hub.mode': z.string(),
   'hub.lease_seconds': z.number().int(),
   'hub.verify_token': z.string(),
 });
diff --git a/packages/@neet/vschedule-api/package.json b/packages/@neet/vschedule-api/package.json
index 0478747b..294c81e1 100644
--- a/packages/@neet/vschedule-api/package.json
+++ b/packages/@neet/vschedule-api/package.json
@@ -24,7 +24,7 @@
     "class-validator": "^0.13.2",
     "color": "^4.2.3",
     "cors": "^2.8.5",
-    "cosmiconfig": "^7.1.0",
+    "cosmiconfig": "^8.0.0",
     "cosmiconfig-toml-loader": "^1.0.0",
     "dayjs": "^1.11.6",
     "express": "^4.18.2",
@@ -39,7 +39,7 @@
     "mkdirp": "^1.0.4",
     "nanoid": "^3.3.4",
     "node-fetch": "^2.6.7",
-    "openapi2aspida": "^0.19.0",
+    "openapi2aspida": "^0.20.0",
     "passport": "^0.6.0",
     "passport-local": "^1.0.0",
     "plaiceholder": "^2.5.0",
@@ -58,7 +58,7 @@
   "devDependencies": {
     "@neet/eslint-plugin-vschedule": "workspace:^",
     "@neet/tsconfig-vschedule": "workspace:^",
-    "@quramy/jest-prisma-node": "^1.1.2",
+    "@quramy/jest-prisma-node": "^1.2.0",
     "@swc/core": "^1.3.19",
     "@swc/jest": "^0.2.23",
     "@types/bcryptjs": "^2.4.2",
diff --git a/packages/@neet/vschedule-api/prisma/migrations/20221122200952_add_channel/migration.sql b/packages/@neet/vschedule-api/prisma/migrations/20221122200952_add_channel/migration.sql
new file mode 100644
index 00000000..8dd226cc
--- /dev/null
+++ b/packages/@neet/vschedule-api/prisma/migrations/20221122200952_add_channel/migration.sql
@@ -0,0 +1,43 @@
+/*
+  Warnings:
+
+  - Added the required column `channel_id` to the `streams` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- AlterTable
+ALTER TABLE `streams` ADD COLUMN `channel_id` VARCHAR(191) NOT NULL;
+
+-- CreateTable
+CREATE TABLE `channels` (
+    `id` VARCHAR(21) NOT NULL,
+    `name` VARCHAR(191) NOT NULL,
+    `status` VARCHAR(191) NOT NULL,
+    `description` TEXT NULL,
+    `performer_id` VARCHAR(191) NULL,
+    `organization_id` VARCHAR(191) NULL,
+
+    INDEX `channels_performer_id_organization_id_idx`(`performer_id`, `organization_id`),
+    PRIMARY KEY (`id`)
+) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- CreateTable
+CREATE TABLE `youtube_channels` (
+    `id` VARCHAR(21) NOT NULL,
+    `youtubeChannelId` VARCHAR(191) NOT NULL,
+
+    UNIQUE INDEX `youtube_channels_youtubeChannelId_key`(`youtubeChannelId`),
+    INDEX `youtube_channels_youtubeChannelId_idx`(`youtubeChannelId`),
+    PRIMARY KEY (`id`)
+) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- AddForeignKey
+ALTER TABLE `streams` ADD CONSTRAINT `streams_channel_id_fkey` FOREIGN KEY (`channel_id`) REFERENCES `channels`(`id`) ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE `channels` ADD CONSTRAINT `channels_performer_id_fkey` FOREIGN KEY (`performer_id`) REFERENCES `performers`(`id`) ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE `channels` ADD CONSTRAINT `channels_organization_id_fkey` FOREIGN KEY (`organization_id`) REFERENCES `organizations`(`id`) ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE `youtube_channels` ADD CONSTRAINT `youtube_channels_id_fkey` FOREIGN KEY (`id`) REFERENCES `channels`(`id`) ON DELETE RESTRICT ON UPDATE CASCADE;
diff --git a/packages/@neet/vschedule-api/prisma/schema.prisma b/packages/@neet/vschedule-api/prisma/schema.prisma
index d392f5b4..39cc525b 100644
--- a/packages/@neet/vschedule-api/prisma/schema.prisma
+++ b/packages/@neet/vschedule-api/prisma/schema.prisma
@@ -41,6 +41,9 @@ model Stream {
   startedAt DateTime  @map("started_at")
   endedAt   DateTime? @map("ended_at")
 
+  channelId String  @map("channel_id")
+  channel   Channel @relation(fields: [channelId], references: [id])
+
   ownerId String    @map("owner_id")
   owner   Performer @relation(fields: [ownerId], references: [id])
 
@@ -75,7 +78,8 @@ model Performer {
   createdAt DateTime @map("created_at")
   updatedAt DateTime @map("updated_at")
 
-  streams Stream[]
+  streams  Stream[]
+  channels Channel[]
 
   @@index([organizationId])
   @@index([youtubeChannelId])
@@ -98,14 +102,42 @@ model Organization {
 
   performers Performer[]
 
-  createdAt DateTime @map("created_at")
-  updatedAt DateTime @map("updated_at")
+  createdAt DateTime  @map("created_at")
+  updatedAt DateTime  @map("updated_at")
+  channels  Channel[]
 
   @@index([youtubeChannelId])
   @@index([twitterUsername])
   @@map("organizations")
 }
 
+model Channel {
+  id          String  @id @db.VarChar(21)
+  name        String
+  status      String
+  description String? @db.Text
+
+  performerId    String?       @map("performer_id")
+  performer      Performer?    @relation(fields: [performerId], references: [id])
+  organizationId String?       @map("organization_id")
+  organization   Organization? @relation(fields: [organizationId], references: [id])
+
+  youtubeChannel YoutubeChannel?
+  streams        Stream[]
+
+  @@index([performerId, organizationId])
+  @@map("channels")
+}
+
+model YoutubeChannel {
+  id               String  @id @db.VarChar(21)
+  youtubeChannelId String  @unique
+  channel          Channel @relation(fields: [id], references: [id])
+
+  @@index([youtubeChannelId])
+  @@map("youtube_channels")
+}
+
 model Token {
   id        String   @id @unique @db.VarChar(64)
   createdAt DateTime @map("created_at")
diff --git a/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/channels.ts b/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/channels.ts
new file mode 100644
index 00000000..66a6ab6e
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/channels.ts
@@ -0,0 +1,19 @@
+import { inject, injectable } from 'inversify';
+import { JsonController, OnUndefined, Param, Post } from 'routing-controllers';
+
+import { RequestChannelSubscription } from '../../../../app/channel/request-channel-subscription';
+
+@injectable()
+@JsonController('/rest/v1/channels')
+export class ChannelController {
+  constructor(
+    @inject(RequestChannelSubscription)
+    private readonly requestChannelSubscription: RequestChannelSubscription,
+  ) {}
+
+  @Post('/:channelId/subscribe')
+  @OnUndefined(202)
+  async subscribe(@Param('channelId') channelId: string): Promise<void> {
+    await this.requestChannelSubscription.invoke({ channelId });
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/index.ts b/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/index.ts
index cae9647e..3e71070e 100644
--- a/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/index.ts
+++ b/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/index.ts
@@ -2,6 +2,7 @@
  * @file Automatically generated by barrelsby.
  */
 
+export * from './channels';
 export * from './media';
 export * from './organizations';
 export * from './performers';
diff --git a/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/performers.ts b/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/performers.ts
index 274eadd2..ad01435f 100644
--- a/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/performers.ts
+++ b/packages/@neet/vschedule-api/src/adapters/controllers/rest/v1/performers.ts
@@ -1,19 +1,7 @@
 import { inject, injectable } from 'inversify';
-import {
-  Authorized,
-  Get,
-  JsonController,
-  OnUndefined,
-  Param,
-  Params,
-  Post,
-} from 'routing-controllers';
+import { Get, JsonController, Param, Params } from 'routing-controllers';
 
-import {
-  ListPerformers,
-  ShowPerformer,
-  SubscribeToPerformer,
-} from '../../../../app';
+import { ListPerformers, ShowPerformer } from '../../../../app';
 import { Methods } from '../../../generated/rest/v1/performers';
 import { RestPresenter } from '../../../mappers';
 
@@ -27,9 +15,6 @@ export class PerformersController {
     @inject(ListPerformers)
     private readonly _listPerformers: ListPerformers,
 
-    @inject(SubscribeToPerformer)
-    private readonly _subscribeToPerformer: SubscribeToPerformer,
-
     @inject(RestPresenter)
     private readonly _presenter: RestPresenter,
   ) {}
@@ -46,16 +31,6 @@ export class PerformersController {
     return this._presenter.presentPerformer(performer);
   }
 
-  @Post('/:performerId/subscribe')
-  @Authorized()
-  @OnUndefined(202)
-  public async subscribe(@Param('performerId') performerId: string) {
-    await this._subscribeToPerformer.invoke({
-      performerId,
-    });
-    // return this.statusCode(202);
-  }
-
   @Get('/')
   async list(
     @Params() params: Methods['get']['query'] = {},
diff --git a/packages/@neet/vschedule-api/src/adapters/controllers/websub/youtube.ts b/packages/@neet/vschedule-api/src/adapters/controllers/websub/youtube.ts
index 16aeb638..d788f682 100644
--- a/packages/@neet/vschedule-api/src/adapters/controllers/websub/youtube.ts
+++ b/packages/@neet/vschedule-api/src/adapters/controllers/websub/youtube.ts
@@ -11,11 +11,8 @@ import {
   UseBefore,
 } from 'routing-controllers';
 
-import {
-  CreateResubscriptionTask,
-  RemoveStream,
-  UpsertStream,
-} from '../../../app';
+import { RemoveStream, UpsertStream } from '../../../app';
+import { VerifyYoutubeChannelSubscription } from '../../../app/channel';
 import { Methods } from '../../generated/websub/youtube';
 
 @injectable()
@@ -28,8 +25,8 @@ export class YoutubeWebsubController {
     @inject(RemoveStream)
     private readonly _removeStream: RemoveStream,
 
-    @inject(CreateResubscriptionTask)
-    private readonly _createResubscriptionTask: CreateResubscriptionTask,
+    @inject(VerifyYoutubeChannelSubscription)
+    private readonly _verifyChannelSubscription: VerifyYoutubeChannelSubscription,
   ) {}
 
   @Get('/')
@@ -38,9 +35,8 @@ export class YoutubeWebsubController {
     @QueryParams() query: Methods['get']['query'],
   ) {
     // TODO: Unsubscribeのときのハンドリング
-    await this._createResubscriptionTask.invoke({
+    await this._verifyChannelSubscription.invoke({
       topic: query['hub.topic'],
-      verifyToken: query['hub.verify_token'],
       leaseSeconds: query['hub.lease_seconds'],
     });
 
diff --git a/packages/@neet/vschedule-api/src/adapters/mappers/prisma-dto-mapper.ts b/packages/@neet/vschedule-api/src/adapters/mappers/prisma-dto-mapper.ts
index fbe5f2ea..95f8539c 100644
--- a/packages/@neet/vschedule-api/src/adapters/mappers/prisma-dto-mapper.ts
+++ b/packages/@neet/vschedule-api/src/adapters/mappers/prisma-dto-mapper.ts
@@ -1,14 +1,17 @@
 import {
+  Channel,
   MediaAttachment,
   Organization,
   Performer,
   Stream,
+  YoutubeChannel,
 } from '@prisma/client';
 import Color from 'color';
 import dayjs from 'dayjs';
 import Duration from 'dayjs/plugin/duration';
 
 import {
+  ChannelDto,
   MediaAttachmentDto,
   OrganizationDto,
   PerformerDto,
@@ -36,8 +39,29 @@ export const transferMediaAttachmentFromPrisma = (
   };
 };
 
+export const transferChannelFromPrisma = (
+  channel: Channel & { youtubeChannel: YoutubeChannel | null },
+): ChannelDto => {
+  if (channel.youtubeChannel != null) {
+    return {
+      type: 'youtube',
+      id: channel.id,
+      name: channel.name,
+      description: channel.description,
+      youtubeChannelId: channel.youtubeChannel.youtubeChannelId,
+    };
+  }
+
+  throw new Error('inexhaustible');
+};
+
 export const transferOrganizationFromPrisma = (
-  organization: Organization & { avatar: MediaAttachment | null },
+  organization: Organization & {
+    avatar: MediaAttachment | null;
+    channels: (Channel & {
+      youtubeChannel: YoutubeChannel | null;
+    })[];
+  },
 ): OrganizationDto => {
   return {
     id: organization.id,
@@ -51,6 +75,9 @@ export const transferOrganizationFromPrisma = (
     url: organization.url != null ? new URL(organization.url) : null,
     twitterUsername: organization.twitterUsername,
     youtubeChannelId: organization.youtubeChannelId,
+    channels: organization.channels.map((channel) =>
+      transferChannelFromPrisma(channel),
+    ),
     createdAt: dayjs(organization.createdAt),
     updatedAt: dayjs(organization.updatedAt),
   };
@@ -62,8 +89,14 @@ export const transferPerformerFromPrisma = (
     organization:
       | (Organization & {
           avatar: MediaAttachment | null;
+          channels: (Channel & {
+            youtubeChannel: YoutubeChannel | null;
+          })[];
         })
       | null;
+    channels: (Channel & {
+      youtubeChannel: YoutubeChannel | null;
+    })[];
   },
 ): PerformerDto => {
   return {
@@ -82,6 +115,9 @@ export const transferPerformerFromPrisma = (
       performer.organization != null
         ? transferOrganizationFromPrisma(performer.organization)
         : null,
+    channels: performer.channels.map((channel) =>
+      transferChannelFromPrisma(channel),
+    ),
     createdAt: dayjs(performer.createdAt),
     updatedAt: dayjs(performer.updatedAt),
   };
@@ -94,8 +130,14 @@ export const transferStreamFromPrisma = (
       organization:
         | (Organization & {
             avatar: MediaAttachment | null;
+            channels: (Channel & {
+              youtubeChannel: YoutubeChannel | null;
+            })[];
           })
         | null;
+      channels: (Channel & {
+        youtubeChannel: YoutubeChannel | null;
+      })[];
     };
     thumbnail: MediaAttachment | null;
   },
@@ -110,7 +152,8 @@ export const transferStreamFromPrisma = (
         ? transferMediaAttachmentFromPrisma(stream.thumbnail)
         : null,
     owner: transferPerformerFromPrisma(stream.owner),
-    casts: [], // TODO
+    participants: [], // TODO
+    channelId: stream.channelId,
 
     startedAt: dayjs(stream.startedAt),
     endedAt: stream.endedAt != null ? dayjs(stream.endedAt) : null,
diff --git a/packages/@neet/vschedule-api/src/adapters/mappers/prisma-entity-mapper.ts b/packages/@neet/vschedule-api/src/adapters/mappers/prisma-entity-mapper.ts
index 657c0289..402b7134 100644
--- a/packages/@neet/vschedule-api/src/adapters/mappers/prisma-entity-mapper.ts
+++ b/packages/@neet/vschedule-api/src/adapters/mappers/prisma-entity-mapper.ts
@@ -1,17 +1,32 @@
+import assert from 'node:assert';
+
 import * as Prisma from '@prisma/client';
 import Color from 'color';
 import dayjs from 'dayjs';
 
 import {
+  Channel,
+  ChannelDescription,
+  ChannelId,
+  ChannelName,
+  ChannelStatus,
+  ChannelYoutube,
   MediaAttachment,
   Organization,
+  OrganizationId,
   Performer,
+  PerformerId,
   Stream,
   Timestamps,
   Token,
   User,
+  YoutubeChannelId,
 } from '../../domain';
 
+const panic = (error: unknown): never => {
+  throw error;
+};
+
 export const rehydrateMediaAttachmentFromPrisma = (
   mediaAttachment: Prisma.MediaAttachment,
 ): MediaAttachment => {
@@ -96,7 +111,8 @@ export const rehydrateStreamFromPrisma = (
       updatedAt: dayjs(stream.updatedAt),
     }),
     ownerId: stream.ownerId,
-    castIds: [], // TODO キャスト
+    participantIds: [], // TODO キャスト
+    channelId: stream.channelId,
     description: stream.description,
     title: stream.title,
     endedAt: stream.endedAt !== null ? dayjs(stream.endedAt) : null,
@@ -126,3 +142,36 @@ export const rehydrateUserFromPrisma = (user: Prisma.User) => {
     }),
   });
 };
+
+export const rehydrateYoutubeChannelFromPrisma = (
+  channel: Prisma.Channel & { youtubeChannel: Prisma.YoutubeChannel | null },
+): Channel => {
+  assert(channel.youtubeChannel != null);
+  return ChannelYoutube.rehydrate({
+    id: new ChannelId(channel.id),
+    name: new ChannelName(channel.name),
+    description:
+      channel.description != null
+        ? new ChannelDescription(channel.description)
+        : null,
+    status: channel.status as ChannelStatus,
+    ownerId:
+      channel.performerId != null
+        ? new PerformerId(channel.performerId)
+        : channel.organizationId != null
+        ? new OrganizationId(channel.organizationId)
+        : panic('unexpected'),
+    youtubeChannelId: new YoutubeChannelId(
+      channel.youtubeChannel.youtubeChannelId,
+    ),
+  });
+};
+
+export const rehydrateChannelFromPrisma = (
+  channel: Prisma.Channel & { youtubeChannel: Prisma.YoutubeChannel | null },
+): Channel => {
+  if (channel.youtubeChannel != null) {
+    return rehydrateYoutubeChannelFromPrisma(channel);
+  }
+  throw new Error('inexhaustible');
+};
diff --git a/packages/@neet/vschedule-api/src/adapters/mappers/rest-presenter.ts b/packages/@neet/vschedule-api/src/adapters/mappers/rest-presenter.ts
index a37922ae..36168b56 100644
--- a/packages/@neet/vschedule-api/src/adapters/mappers/rest-presenter.ts
+++ b/packages/@neet/vschedule-api/src/adapters/mappers/rest-presenter.ts
@@ -3,6 +3,7 @@ import { URL } from 'node:url';
 import { inject, injectable } from 'inversify';
 
 import {
+  ChannelDto,
   IConfig,
   MediaAttachmentDto,
   OrganizationDto,
@@ -43,6 +44,19 @@ export class RestPresenter {
     };
   }
 
+  public presentChannel(channel: ChannelDto): Rest.Channel {
+    if (channel.type === 'youtube') {
+      return {
+        type: 'youtube',
+        id: channel.id,
+        name: channel.name,
+        description: channel.description,
+        url: `https://youtube.com/channel/${channel.youtubeChannelId}`,
+      };
+    }
+    throw new Error('unknown type');
+  }
+
   public presentOrganization(organization: OrganizationDto): Rest.Organization {
     return {
       id: organization.id,
@@ -56,6 +70,9 @@ export class RestPresenter {
         organization.avatar !== null
           ? this.presentMediaAttachment(organization.avatar)
           : undefined,
+      channels: organization.channels.map((channel) =>
+        this.presentChannel(channel),
+      ),
       createdAt: organization.createdAt.toISOString(),
       updatedAt: organization.updatedAt.toISOString(),
     };
@@ -76,6 +93,9 @@ export class RestPresenter {
           : undefined,
       createdAt: performer.createdAt.toISOString(),
       updatedAt: performer.updatedAt.toISOString(),
+      channels: performer.channels.map((channel) =>
+        this.presentChannel(channel),
+      ),
       organization:
         performer.organization !== null
           ? this.presentOrganization(performer.organization)
@@ -95,7 +115,8 @@ export class RestPresenter {
       endedAt: stream.endedAt === null ? null : stream.endedAt.toISOString(),
       owner: this.presentPerformer(stream.owner),
       duration: stream.duration === null ? null : stream.duration.toISOString(),
-      casts: [], // TODO
+      participants: [], // TODO
+      channelId: stream.channelId,
       thumbnail:
         stream.thumbnail !== null
           ? this.presentMediaAttachment(stream.thumbnail)
diff --git a/packages/@neet/vschedule-api/src/adapters/query-services/organization-query-service-prisma.ts b/packages/@neet/vschedule-api/src/adapters/query-services/organization-query-service-prisma.ts
index 47830c71..95747afb 100644
--- a/packages/@neet/vschedule-api/src/adapters/query-services/organization-query-service-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/query-services/organization-query-service-prisma.ts
@@ -12,6 +12,11 @@ import { transferOrganizationFromPrisma } from '../mappers';
 
 const DEFAULT_INCLUDE = Object.freeze({
   avatar: true,
+  channels: {
+    include: {
+      youtubeChannel: true,
+    },
+  },
 });
 
 @injectable()
diff --git a/packages/@neet/vschedule-api/src/adapters/query-services/performer-query-service-prisma.ts b/packages/@neet/vschedule-api/src/adapters/query-services/performer-query-service-prisma.ts
index 6a9d77ef..edb3b124 100644
--- a/packages/@neet/vschedule-api/src/adapters/query-services/performer-query-service-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/query-services/performer-query-service-prisma.ts
@@ -10,14 +10,24 @@ import { PerformerId, YoutubeChannelId } from '../../domain';
 import { TYPES } from '../../types';
 import { transferPerformerFromPrisma } from '../mappers';
 
-const DEFAULT_INCLUDE = {
+const DEFAULT_INCLUDE = Object.freeze({
   avatar: true,
+  channels: {
+    include: {
+      youtubeChannel: true,
+    },
+  },
   organization: {
     include: {
       avatar: true,
+      channels: {
+        include: {
+          youtubeChannel: true,
+        },
+      },
     },
   },
-};
+});
 
 @injectable()
 export class PerformerQueryServicePrisma implements IPerformerQueryService {
diff --git a/packages/@neet/vschedule-api/src/adapters/query-services/stream-query-service-prisma.ts b/packages/@neet/vschedule-api/src/adapters/query-services/stream-query-service-prisma.ts
index 37dddad2..138db1ef 100644
--- a/packages/@neet/vschedule-api/src/adapters/query-services/stream-query-service-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/query-services/stream-query-service-prisma.ts
@@ -16,9 +16,19 @@ const SHARED_INCLUDE = {
   owner: {
     include: {
       avatar: true,
+      channels: {
+        include: {
+          youtubeChannel: true,
+        },
+      },
       organization: {
         include: {
           avatar: true,
+          channels: {
+            include: {
+              youtubeChannel: true,
+            },
+          },
         },
       },
     },
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/channel-repository-prisma.ts b/packages/@neet/vschedule-api/src/adapters/repositories/channel-repository-prisma.ts
new file mode 100644
index 00000000..0288ccaf
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/channel-repository-prisma.ts
@@ -0,0 +1,141 @@
+import { PrismaClient } from '@prisma/client';
+import { inject, injectable } from 'inversify';
+
+import { IChannelRepository } from '../../app';
+import {
+  Channel,
+  ChannelId,
+  ChannelYoutube,
+  OrganizationId,
+  PerformerId,
+  YoutubeChannelId,
+} from '../../domain';
+import { TYPES } from '../../types';
+import {
+  rehydrateChannelFromPrisma,
+  rehydrateYoutubeChannelFromPrisma,
+} from '../mappers';
+
+@injectable()
+export class ChannelRepositoryPrisma implements IChannelRepository {
+  public constructor(
+    @inject(TYPES.PrismaClient)
+    private readonly _prisma: PrismaClient,
+  ) {}
+
+  async create(channel: Channel): Promise<void> {
+    if (channel instanceof ChannelYoutube) {
+      await this._prisma.channel.create({
+        data: {
+          id: channel.id.value,
+          name: channel.name.value,
+          description: channel.description?.value ?? null,
+          status: channel.status,
+          performerId:
+            channel.ownerId instanceof PerformerId
+              ? channel.ownerId.value
+              : null,
+          organizationId:
+            channel.ownerId instanceof OrganizationId
+              ? channel.ownerId.value
+              : null,
+          youtubeChannel: {
+            create: {
+              youtubeChannelId: channel.youtubeChannelId.value,
+            },
+          },
+        },
+      });
+      return;
+    }
+
+    throw new Error('Inexhaustible error');
+  }
+
+  async update(channel: Channel): Promise<void> {
+    if (channel instanceof ChannelYoutube) {
+      await this._prisma.channel.update({
+        where: {
+          id: channel.id.value,
+        },
+        data: {
+          name: channel.name.value,
+          description: channel.description?.value ?? null,
+          status: channel.status,
+          performerId:
+            channel.ownerId instanceof PerformerId
+              ? channel.ownerId.value
+              : null,
+          organizationId:
+            channel.ownerId instanceof OrganizationId
+              ? channel.ownerId.value
+              : null,
+          youtubeChannel: {
+            update: {
+              youtubeChannelId: channel.youtubeChannelId.value,
+            },
+          },
+        },
+      });
+      return;
+    }
+
+    throw new Error('Inexhaustible error');
+  }
+
+  async findById(channelId: ChannelId): Promise<Channel | null> {
+    const channel = await this._prisma.channel.findFirst({
+      where: {
+        id: channelId.value,
+      },
+      include: {
+        youtubeChannel: true,
+      },
+    });
+
+    if (channel == null) {
+      return null;
+    }
+    if (channel.youtubeChannel != null) {
+      return rehydrateYoutubeChannelFromPrisma(channel);
+    }
+
+    throw new Error('unexpected');
+  }
+
+  async findByOwnerId(
+    ownerId: PerformerId | OrganizationId,
+  ): Promise<Channel[]> {
+    if (ownerId instanceof PerformerId) {
+      const data = await this._prisma.channel.findMany({
+        where: {
+          performerId: ownerId.value,
+        },
+        include: {
+          youtubeChannel: true,
+        },
+      });
+      return data.map((v) => rehydrateChannelFromPrisma(v));
+    }
+    throw new Error('unexpected');
+  }
+
+  async findByYoutubeChannelId(
+    youtubeChannelId: YoutubeChannelId,
+  ): Promise<ChannelYoutube | null> {
+    const data = await this._prisma.channel.findFirst({
+      where: {
+        youtubeChannel: {
+          youtubeChannelId: youtubeChannelId.value,
+        },
+      },
+      include: {
+        youtubeChannel: true,
+      },
+    });
+    if (data == null) {
+      return null;
+    }
+    return rehydrateChannelFromPrisma(data);
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/index.ts b/packages/@neet/vschedule-api/src/adapters/repositories/index.ts
index ed9ec7e9..81906b4c 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/index.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/index.ts
@@ -2,6 +2,7 @@
  * @file Automatically generated by barrelsby.
  */
 
+export * from './channel-repository-prisma';
 export * from './media-attachment-repository-prisma';
 export * from './organization-repository-prisma';
 export * from './performer-repository-prisma';
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/media-attachment-repository-prisma.ts b/packages/@neet/vschedule-api/src/adapters/repositories/media-attachment-repository-prisma.ts
index f5dbf569..0ad033f5 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/media-attachment-repository-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/media-attachment-repository-prisma.ts
@@ -2,9 +2,8 @@ import { PrismaClient } from '@prisma/client';
 import { inject, injectable } from 'inversify';
 import { getPlaiceholder } from 'plaiceholder';
 
-import { IStorage } from '../../app';
+import { IMediaAttachmentRepository, IStorage } from '../../app';
 import {
-  IMediaAttachmentRepository,
   MediaAttachment,
   MediaAttachmentFilename,
   MediaAttachmentId,
@@ -54,6 +53,20 @@ export class MediaAttachmentRepositoryPrisma
     return rehydrateMediaAttachmentFromPrisma(data);
   }
 
+  async findByRemoteUrl(url: URL): Promise<MediaAttachment | undefined> {
+    const data = await this._prisma.mediaAttachment.findFirst({
+      where: {
+        remoteUrl: url.toString(),
+      },
+    });
+
+    if (data == null) {
+      return;
+    }
+
+    return rehydrateMediaAttachmentFromPrisma(data);
+  }
+
   async save(
     filename: MediaAttachmentFilename,
     buffer: Buffer,
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/organization-repository-prisma.ts b/packages/@neet/vschedule-api/src/adapters/repositories/organization-repository-prisma.ts
index 69b92d67..9d57b333 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/organization-repository-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/organization-repository-prisma.ts
@@ -1,9 +1,8 @@
 import { Prisma, PrismaClient } from '@prisma/client';
 import { inject, injectable } from 'inversify';
 
+import { FindOrganizationParams, IOrganizationRepository } from '../../app';
 import {
-  FindOrganizationParams,
-  IOrganizationRepository,
   Organization,
   OrganizationId,
   PerformerId,
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/performer-repository-prisma.ts b/packages/@neet/vschedule-api/src/adapters/repositories/performer-repository-prisma.ts
index ca68a35f..4144b7a4 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/performer-repository-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/performer-repository-prisma.ts
@@ -1,14 +1,8 @@
 import { Prisma, PrismaClient } from '@prisma/client';
 import { inject, injectable } from 'inversify';
 
-import {
-  FindPerformerParams,
-  IPerformerRepository,
-  Performer,
-  PerformerId,
-  unwrap,
-  YoutubeChannelId,
-} from '../../domain';
+import { FindPerformerParams, IPerformerRepository } from '../../app';
+import { Performer, PerformerId, unwrap, YoutubeChannelId } from '../../domain';
 import { TYPES } from '../../types';
 import { rehydratePerformerFromPrisma } from '../mappers';
 
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/repositories.ts b/packages/@neet/vschedule-api/src/adapters/repositories/repositories.ts
index 69bb6ff5..f66d1586 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/repositories.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/repositories.ts
@@ -1,6 +1,7 @@
 import { ContainerModule } from 'inversify';
 
 import {
+  IChannelRepository,
   IMediaAttachmentRepository,
   IOrganizationRepository,
   IPerformerRepository,
@@ -8,8 +9,9 @@ import {
   IStreamRepository,
   ITokenRepository,
   IUserRepository,
-} from '../../domain';
+} from '../../app';
 import { TYPES } from '../../types';
+import { ChannelRepositoryPrisma } from './channel-repository-prisma';
 import { MediaAttachmentRepositoryPrisma } from './media-attachment-repository-prisma';
 import { OrganizationRepositoryPrisma } from './organization-repository-prisma';
 import { PerformerRepositoryPrisma } from './performer-repository-prisma';
@@ -23,47 +25,38 @@ const prisma = new ContainerModule((bind) => {
   bind<IPerformerRepository>(TYPES.PerformerRepository).to(
     PerformerRepositoryPrisma,
   );
-
   bind<IOrganizationRepository>(TYPES.OrganizationRepository).to(
     OrganizationRepositoryPrisma,
   );
-
   bind<IStreamRepository>(TYPES.StreamRepository).to(StreamRepositoryPrisma);
-
   bind<IMediaAttachmentRepository>(TYPES.MediaAttachmentRepository).to(
     MediaAttachmentRepositoryPrisma,
   );
-
   bind<IResubscriptionTaskRepository>(TYPES.ResubscriptionTaskRepository).to(
     ResubscriptionTaskRepositoryCloudTasks,
   );
-
   bind<IUserRepository>(TYPES.UserRepository).to(UserRepositoryPrisma);
-
   bind<ITokenRepository>(TYPES.TokenRepository).to(TokenRepositoryPrisma);
+  bind<IChannelRepository>(TYPES.ChannelRepository).to(ChannelRepositoryPrisma);
 });
 
 const withoutGcp = new ContainerModule((bind) => {
   bind<IPerformerRepository>(TYPES.PerformerRepository).to(
     PerformerRepositoryPrisma,
   );
-
   bind<IOrganizationRepository>(TYPES.OrganizationRepository).to(
     OrganizationRepositoryPrisma,
   );
-
   bind<IStreamRepository>(TYPES.StreamRepository).to(StreamRepositoryPrisma);
-
   bind<IMediaAttachmentRepository>(TYPES.MediaAttachmentRepository).to(
     MediaAttachmentRepositoryPrisma,
   );
   bind<IUserRepository>(TYPES.UserRepository).to(UserRepositoryPrisma);
-
   bind<ITokenRepository>(TYPES.TokenRepository).to(TokenRepositoryPrisma);
-
   bind<IResubscriptionTaskRepository>(TYPES.ResubscriptionTaskRepository)
     .to(ResubscriptionTaskRepositoryInMemory)
     .inSingletonScope();
+  bind<IChannelRepository>(TYPES.ChannelRepository).to(ChannelRepositoryPrisma);
 });
 
 export const repositories = { prisma, withoutGcp };
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/resubscription-task-repository-cloud-tasks.ts b/packages/@neet/vschedule-api/src/adapters/repositories/resubscription-task-repository-cloud-tasks.ts
index 2d2f38ba..674f8316 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/resubscription-task-repository-cloud-tasks.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/resubscription-task-repository-cloud-tasks.ts
@@ -2,11 +2,13 @@ import { CloudTasksClient } from '@google-cloud/tasks';
 import { google } from '@google-cloud/tasks/build/protos/protos';
 import { inject, injectable } from 'inversify';
 
-import { IConfig, ILogger, utils } from '../../app';
 import {
+  IConfig,
+  ILogger,
   IResubscriptionTaskRepository,
-  ResubscriptionTask,
-} from '../../domain';
+  utils,
+} from '../../app';
+import { ResubscriptionTask } from '../../domain';
 import { TYPES } from '../../types';
 
 @injectable()
@@ -26,7 +28,7 @@ export class ResubscriptionTaskRepositoryCloudTasks
   async create(task: ResubscriptionTask): Promise<void> {
     const url = utils.resolvePath(
       this._config,
-      `/rest/v1/performers/${task.performerId.value}/subscribe`,
+      `/rest/v1/performers/${task.channelId.value}/subscribe`,
     );
 
     await this._tasks.createTask({
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/resubscription-task-repository-in-memory.ts b/packages/@neet/vschedule-api/src/adapters/repositories/resubscription-task-repository-in-memory.ts
index 70aeeec1..cb99d44a 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/resubscription-task-repository-in-memory.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/resubscription-task-repository-in-memory.ts
@@ -1,9 +1,7 @@
 import { injectable } from 'inversify';
 
-import {
-  IResubscriptionTaskRepository,
-  ResubscriptionTask,
-} from '../../domain';
+import { IResubscriptionTaskRepository } from '../../app';
+import { ResubscriptionTask } from '../../domain';
 
 @injectable()
 export class ResubscriptionTaskRepositoryInMemory
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/stream-repository-prisma.ts b/packages/@neet/vschedule-api/src/adapters/repositories/stream-repository-prisma.ts
index 74254869..4f02a3d4 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/stream-repository-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/stream-repository-prisma.ts
@@ -2,13 +2,8 @@ import { PrismaClient } from '@prisma/client';
 import { inject, injectable } from 'inversify';
 import { URL } from 'url';
 
-import {
-  IStreamRepository,
-  ListStreamsParams,
-  Stream,
-  StreamId,
-  unwrap,
-} from '../../domain';
+import { IStreamRepository, ListStreamsParams } from '../../app';
+import { Stream, StreamId, unwrap } from '../../domain';
 import { TYPES } from '../../types';
 import { rehydrateStreamFromPrisma } from '../mappers';
 
@@ -73,6 +68,7 @@ export class StreamRepositoryPrisma implements IStreamRepository {
         endedAt: stream.endedAt === null ? null : stream.endedAt.toDate(),
         thumbnailId:
           stream.thumbnail === null ? null : stream.thumbnail.id.value,
+        channelId: stream.channelId.value,
         ownerId: stream.ownerId.value,
       },
       update: {
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/token-repository-prisma.ts b/packages/@neet/vschedule-api/src/adapters/repositories/token-repository-prisma.ts
index ee7c35b5..ba965e8f 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/token-repository-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/token-repository-prisma.ts
@@ -1,7 +1,8 @@
 import { PrismaClient } from '@prisma/client';
 import { inject, injectable } from 'inversify';
 
-import { ITokenRepository, Token, TokenId } from '../../domain';
+import { ITokenRepository } from '../../app';
+import { Token, TokenId } from '../../domain';
 import { TYPES } from '../../types';
 import { rehydrateTokenFromPrisma } from '../mappers';
 
diff --git a/packages/@neet/vschedule-api/src/adapters/repositories/user-repository-prisma.ts b/packages/@neet/vschedule-api/src/adapters/repositories/user-repository-prisma.ts
index e6a2e6d6..dc869973 100644
--- a/packages/@neet/vschedule-api/src/adapters/repositories/user-repository-prisma.ts
+++ b/packages/@neet/vschedule-api/src/adapters/repositories/user-repository-prisma.ts
@@ -1,7 +1,8 @@
 import { PrismaClient } from '@prisma/client';
 import { inject, injectable } from 'inversify';
 
-import { IUserRepository, User, UserEmail, UserId } from '../../domain';
+import { IUserRepository } from '../../app';
+import { User, UserEmail, UserId } from '../../domain';
 import { TYPES } from '../../types';
 import { rehydrateUserFromPrisma } from '../mappers';
 
diff --git a/packages/@neet/vschedule-api/src/app/_shared/config/config-base.ts b/packages/@neet/vschedule-api/src/app/_shared/config/config-base.ts
index c24bacb3..5e712e5e 100644
--- a/packages/@neet/vschedule-api/src/app/_shared/config/config-base.ts
+++ b/packages/@neet/vschedule-api/src/app/_shared/config/config-base.ts
@@ -27,7 +27,6 @@ abstract class $ConfigBase {
       youtube: {
         dataApiKey: input.youtube.dataApiKey,
         websubHmacSecret: input.youtube.websubHmacSecret ?? 'secret',
-        websubVerifyToken: input.youtube.websubVerifyToken ?? 'token',
       },
       server: {
         port: input.server?.port ?? 3000,
diff --git a/packages/@neet/vschedule-api/src/app/_shared/config/config.ts b/packages/@neet/vschedule-api/src/app/_shared/config/config.ts
index b2630121..9c64c87b 100644
--- a/packages/@neet/vschedule-api/src/app/_shared/config/config.ts
+++ b/packages/@neet/vschedule-api/src/app/_shared/config/config.ts
@@ -4,7 +4,6 @@ export const configSchema = z.object({
   youtube: z.object({
     dataApiKey: z.string(),
     websubHmacSecret: z.string(),
-    websubVerifyToken: z.string(),
   }),
   storage: z.object({
     type: z.union([z.literal('cloud-storage'), z.literal('filesystem')]),
diff --git a/packages/@neet/vschedule-api/src/app/channel/channel-repository.ts b/packages/@neet/vschedule-api/src/app/channel/channel-repository.ts
new file mode 100644
index 00000000..7bd4dfee
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/app/channel/channel-repository.ts
@@ -0,0 +1,18 @@
+import {
+  Channel,
+  ChannelId,
+  ChannelYoutube,
+  OrganizationId,
+  PerformerId,
+  YoutubeChannelId,
+} from '../../domain';
+
+export interface IChannelRepository {
+  create(channel: Channel): Promise<void>;
+  update(channel: Channel): Promise<void>;
+  findById(channelId: ChannelId): Promise<Channel | null>;
+  findByOwnerId(ownerId: PerformerId | OrganizationId): Promise<Channel[]>;
+  findByYoutubeChannelId(
+    youtubeChannelId: YoutubeChannelId,
+  ): Promise<ChannelYoutube | null>;
+}
diff --git a/packages/@neet/vschedule-api/src/app/channel/index.ts b/packages/@neet/vschedule-api/src/app/channel/index.ts
new file mode 100644
index 00000000..4e6adb89
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/app/channel/index.ts
@@ -0,0 +1,7 @@
+/**
+ * @file Automatically generated by barrelsby.
+ */
+
+export * from './channel-repository';
+export * from './request-channel-subscription';
+export * from './verify-youtube-channel-subscription';
diff --git a/packages/@neet/vschedule-api/src/app/channel/request-channel-subscription.ts b/packages/@neet/vschedule-api/src/app/channel/request-channel-subscription.ts
new file mode 100644
index 00000000..e8894bbe
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/app/channel/request-channel-subscription.ts
@@ -0,0 +1,51 @@
+import { inject, injectable } from 'inversify';
+
+import { ChannelId } from '../../domain';
+import { TYPES } from '../../types';
+import { IYoutubeWebsubService } from '../_external';
+import { AppError } from '../_shared';
+import { IChannelRepository } from './channel-repository';
+
+export class RequestChannelSubscriptionNotFoundError extends AppError {
+  readonly name = 'RequestChannelSubscriptionNotFoundError';
+
+  constructor(readonly id: ChannelId) {
+    super(`Channel with id ${id} was not found`);
+  }
+}
+
+export type RequestChannelSubscriptionCommand = {
+  readonly channelId: string;
+};
+
+@injectable()
+export class RequestChannelSubscription {
+  constructor(
+    @inject(TYPES.ChannelRepository)
+    private readonly _channelRepository: IChannelRepository,
+
+    @inject(TYPES.YoutubeWebsubService)
+    private readonly _youtubeWebsubService: IYoutubeWebsubService,
+  ) {}
+
+  async invoke(params: RequestChannelSubscriptionCommand): Promise<void> {
+    const channelId = new ChannelId(params.channelId);
+    const channel = await this._channelRepository.findById(channelId);
+    if (channel == null) {
+      throw new RequestChannelSubscriptionNotFoundError(channelId);
+    }
+
+    try {
+      const updatedChannel = channel.requestSubscription();
+      await this._channelRepository.update(updatedChannel);
+
+      // FIXME リポジトリでやるのが正解な気がする
+      await this._youtubeWebsubService.subscribeToChannel(
+        updatedChannel.youtubeChannelId.value,
+      );
+    } catch (error) {
+      const updatedChannel = channel.resetSubscription();
+      await this._channelRepository.update(updatedChannel);
+    }
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/app/channel/verify-youtube-channel-subscription.ts b/packages/@neet/vschedule-api/src/app/channel/verify-youtube-channel-subscription.ts
new file mode 100644
index 00000000..8452c8ed
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/app/channel/verify-youtube-channel-subscription.ts
@@ -0,0 +1,91 @@
+import dayjs from 'dayjs';
+import { inject, injectable } from 'inversify';
+
+import { ChannelService, YoutubeChannelId } from '../../domain';
+import { TYPES } from '../../types';
+import { AppError, ILogger } from '../_shared';
+import { IResubscriptionTaskRepository } from '../resubscription-task';
+import { ITokenRepository } from '../token';
+import { IChannelRepository } from './channel-repository';
+
+export class VerifyYoutubeChannelSubscriptionInvalidTopicError extends AppError {
+  public readonly name = 'VerifyYoutubeChannelSubscriptionInvalidTopicError';
+
+  public constructor(public readonly topic: string) {
+    super(`Invalid topic ${topic}`);
+  }
+}
+
+export class VerifyYoutubeChannelSubscriptionUnknownChannelError extends AppError {
+  public readonly name = 'VerifyYoutubeChannelSubscriptionUnknownChannelError';
+
+  public constructor(public readonly youtubeChannelId: YoutubeChannelId) {
+    super(
+      `You claimed that you verified ${youtubeChannelId} but it is not requested from our end`,
+    );
+  }
+}
+
+export type VerifyYoutubeChannelSubscriptionCommand = {
+  readonly topic: string;
+  readonly leaseSeconds: number;
+};
+
+@injectable()
+export class VerifyYoutubeChannelSubscription {
+  public constructor(
+    @inject(ChannelService)
+    private readonly _channelService: ChannelService,
+
+    @inject(TYPES.ChannelRepository)
+    private readonly _channelRepository: IChannelRepository,
+
+    @inject(TYPES.TokenRepository)
+    private readonly _tokenRepository: ITokenRepository,
+
+    @inject(TYPES.ResubscriptionTaskRepository)
+    private readonly _resubscriptionTaskRepository: IResubscriptionTaskRepository,
+
+    @inject(TYPES.Logger)
+    private readonly _logger: ILogger,
+  ) {}
+
+  public async invoke(
+    command: VerifyYoutubeChannelSubscriptionCommand,
+  ): Promise<void> {
+    const topic = new URL(command.topic);
+    const youtubeChannelIdStr = topic.searchParams.get('channel_id');
+    if (youtubeChannelIdStr == null) {
+      throw new VerifyYoutubeChannelSubscriptionInvalidTopicError(
+        command.topic,
+      );
+    }
+
+    const youtubeChannelId = new YoutubeChannelId(youtubeChannelIdStr);
+    const channel = await this._channelRepository.findByYoutubeChannelId(
+      youtubeChannelId,
+    );
+    if (channel == null) {
+      throw new VerifyYoutubeChannelSubscriptionUnknownChannelError(
+        youtubeChannelId,
+      );
+    }
+
+    const {
+      channel: updatedChannel,
+      token,
+      resubscriptionTask,
+    } = this._channelService.verifySubscription(
+      channel,
+      dayjs().add(command.leaseSeconds, 'seconds'),
+    );
+
+    await this._channelRepository.update(updatedChannel);
+    await this._tokenRepository.create(token);
+    await this._resubscriptionTaskRepository.create(resubscriptionTask);
+
+    this._logger.info(
+      `Scheduled resubscription for ${topic} in ${command.leaseSeconds} secs`,
+    );
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/app/dto.ts b/packages/@neet/vschedule-api/src/app/dto.ts
index a80f7576..1d9819aa 100644
--- a/packages/@neet/vschedule-api/src/app/dto.ts
+++ b/packages/@neet/vschedule-api/src/app/dto.ts
@@ -14,6 +14,23 @@ export type MediaAttachmentDto = {
   readonly updatedAt: Dayjs;
 };
 
+export type BaseChannelDto<T> = {
+  readonly type: T;
+  readonly id: string;
+  readonly name: string;
+  readonly description: string | null;
+};
+
+export type YoutubeChannelDto = BaseChannelDto<'youtube'> & {
+  readonly youtubeChannelId: string;
+};
+
+export type TwicastingChannelDto = BaseChannelDto<'twicasting'> & {
+  readonly twicastingScreenName: string;
+};
+
+export type ChannelDto = YoutubeChannelDto | TwicastingChannelDto;
+
 export type OrganizationDto = {
   readonly id: string;
   readonly name: string;
@@ -21,6 +38,7 @@ export type OrganizationDto = {
   readonly description: string | null;
   readonly avatar: MediaAttachmentDto | null;
   readonly url: URL | null;
+  readonly channels: ChannelDto[];
   readonly twitterUsername: string | null;
   readonly youtubeChannelId: string | null;
   readonly createdAt: Dayjs;
@@ -34,6 +52,7 @@ export type PerformerDto = {
   readonly description: string | null;
   readonly avatar: MediaAttachmentDto | null;
   readonly url: URL | null;
+  readonly channels: ChannelDto[];
   readonly twitterUsername: string | null;
   readonly youtubeChannelId: string | null;
   readonly organization: OrganizationDto | null;
@@ -48,7 +67,8 @@ export type StreamDto = {
   readonly url: URL;
   readonly thumbnail: MediaAttachmentDto | null;
   readonly owner: PerformerDto;
-  readonly casts: readonly PerformerDto[];
+  readonly channelId: string;
+  readonly participants: readonly PerformerDto[];
   readonly startedAt: Dayjs;
   readonly endedAt: Dayjs | null;
   readonly createdAt: Dayjs;
diff --git a/packages/@neet/vschedule-api/src/app/factories.ts b/packages/@neet/vschedule-api/src/app/factories.ts
index 32386b38..0f02955e 100644
--- a/packages/@neet/vschedule-api/src/app/factories.ts
+++ b/packages/@neet/vschedule-api/src/app/factories.ts
@@ -1,17 +1,11 @@
 import { ContainerModule } from 'inversify';
 
-import {
-  IOrganizationFactory,
-  IPerformerFactory,
-  IStreamFactory,
-} from '../domain';
+import { IOrganizationFactory, IPerformerFactory } from '../domain';
 import { TYPES } from '../types';
 import { OrganizationFactory } from './organization';
 import { PerformerFactoryImpl } from './performer';
-import { StreamFactoryImpl } from './stream';
 
 export const factories = new ContainerModule((bind) => {
-  bind<IStreamFactory>(TYPES.StreamFactory).to(StreamFactoryImpl);
   bind<IPerformerFactory>(TYPES.PerformerFactory).to(PerformerFactoryImpl);
   bind<IOrganizationFactory>(TYPES.OrganizationFactory).to(OrganizationFactory);
 });
diff --git a/packages/@neet/vschedule-api/src/app/index.ts b/packages/@neet/vschedule-api/src/app/index.ts
index a25b0f87..bf2759b6 100644
--- a/packages/@neet/vschedule-api/src/app/index.ts
+++ b/packages/@neet/vschedule-api/src/app/index.ts
@@ -4,11 +4,13 @@
 
 export * from './_external/index';
 export * from './_shared/index';
+export * from './channel/index';
 export * from './dto';
 export * from './factories';
 export * from './media-attachment/index';
 export * from './organization/index';
 export * from './performer/index';
+export * from './resubscription-task/index';
 export * from './stream/index';
 export * from './token/index';
 export * from './user/index';
diff --git a/packages/@neet/vschedule-api/src/app/media-attachment/index.ts b/packages/@neet/vschedule-api/src/app/media-attachment/index.ts
index fdfebaeb..5f9a77ee 100644
--- a/packages/@neet/vschedule-api/src/app/media-attachment/index.ts
+++ b/packages/@neet/vschedule-api/src/app/media-attachment/index.ts
@@ -2,4 +2,5 @@
  * @file Automatically generated by barrelsby.
  */
 
+export * from './media-attachment-repository';
 export * from './show-media-attachment';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/media-attachment/media-attachment-repository.ts b/packages/@neet/vschedule-api/src/app/media-attachment/media-attachment-repository.ts
similarity index 67%
rename from packages/@neet/vschedule-api/src/domain/entities/media-attachment/media-attachment-repository.ts
rename to packages/@neet/vschedule-api/src/app/media-attachment/media-attachment-repository.ts
index 5caa50cf..20a36a9b 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/media-attachment/media-attachment-repository.ts
+++ b/packages/@neet/vschedule-api/src/app/media-attachment/media-attachment-repository.ts
@@ -1,18 +1,20 @@
-import { MediaAttachment } from './media-attachment';
-import { MediaAttachmentFilename } from './media-attachment-filename';
-import { MediaAttachmentId } from './media-attachment-id';
+import {
+  MediaAttachment,
+  MediaAttachmentFilename,
+  MediaAttachmentId,
+} from '../../domain';
 
 export interface IMediaAttachmentRepository {
   findById(id: MediaAttachmentId): Promise<MediaAttachment | undefined>;
   findByFilename(
     filename: MediaAttachmentFilename,
   ): Promise<MediaAttachment | undefined>;
+  findByRemoteUrl(url: URL): Promise<MediaAttachment | undefined>;
 
   save(
     filename: MediaAttachmentFilename,
     buffer: Buffer,
     remoteUrl?: URL,
   ): Promise<MediaAttachment>;
-
   delete(id: MediaAttachmentId): Promise<void>;
 }
diff --git a/packages/@neet/vschedule-api/src/app/media-attachment/show-media-attachment.ts b/packages/@neet/vschedule-api/src/app/media-attachment/show-media-attachment.ts
index 708de478..7caf3344 100644
--- a/packages/@neet/vschedule-api/src/app/media-attachment/show-media-attachment.ts
+++ b/packages/@neet/vschedule-api/src/app/media-attachment/show-media-attachment.ts
@@ -1,12 +1,9 @@
 import { inject, injectable } from 'inversify';
 
-import {
-  IMediaAttachmentRepository,
-  MediaAttachment,
-  MediaAttachmentFilename,
-} from '../../domain';
+import { MediaAttachment, MediaAttachmentFilename } from '../../domain';
 import { TYPES } from '../../types';
 import { AppError } from '../_shared';
+import { IMediaAttachmentRepository } from './media-attachment-repository';
 
 export class ShowMediaAttachmentNotFoundError extends AppError {
   public readonly name = 'ShowMediaAttachmentNotFoundError';
diff --git a/packages/@neet/vschedule-api/src/app/organization/index.ts b/packages/@neet/vschedule-api/src/app/organization/index.ts
index fdd8c7d9..d81fe7b2 100644
--- a/packages/@neet/vschedule-api/src/app/organization/index.ts
+++ b/packages/@neet/vschedule-api/src/app/organization/index.ts
@@ -5,5 +5,6 @@
 export * from './list-organizations';
 export * from './organization-factory-impl';
 export * from './organization-query-service';
+export * from './organization-repository';
 export * from './show-organization';
 export * from './upsert-organization';
diff --git a/packages/@neet/vschedule-api/src/app/organization/organization-factory-impl.ts b/packages/@neet/vschedule-api/src/app/organization/organization-factory-impl.ts
index 1a79e450..aadcdcb8 100644
--- a/packages/@neet/vschedule-api/src/app/organization/organization-factory-impl.ts
+++ b/packages/@neet/vschedule-api/src/app/organization/organization-factory-impl.ts
@@ -5,7 +5,6 @@ import fetch from 'node-fetch';
 import sharp from 'sharp';
 
 import {
-  IMediaAttachmentRepository,
   IOrganizationFactory,
   MediaAttachmentFilename,
   Organization,
@@ -15,6 +14,7 @@ import {
 import { TYPES } from '../../types';
 import { IYoutubeApiService } from '../_external';
 import { AppError, ILogger, UnexpectedError } from '../_shared';
+import { IMediaAttachmentRepository } from '../media-attachment';
 
 export class OrganizationFactoryChannelNotFoundError extends AppError {
   public readonly name = 'OrganizationFactoryChannelNotFoundError';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/organization/organization-repository.ts b/packages/@neet/vschedule-api/src/app/organization/organization-repository.ts
similarity index 68%
rename from packages/@neet/vschedule-api/src/domain/entities/organization/organization-repository.ts
rename to packages/@neet/vschedule-api/src/app/organization/organization-repository.ts
index 5e62de54..8b56729c 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/organization/organization-repository.ts
+++ b/packages/@neet/vschedule-api/src/app/organization/organization-repository.ts
@@ -1,12 +1,14 @@
-import { YoutubeChannelId } from '../_shared';
-import { PerformerId } from '../performer';
-import { Organization } from './organization';
-import { OrganizationId } from './organization-id';
+import {
+  Organization,
+  OrganizationId,
+  PerformerId,
+  YoutubeChannelId,
+} from '../../domain';
 
-export interface FindOrganizationParams {
+export type FindOrganizationParams = {
   readonly limit?: number;
   readonly offset?: number;
-}
+};
 
 export interface IOrganizationRepository {
   create(organization: Organization): Promise<Organization>;
diff --git a/packages/@neet/vschedule-api/src/app/organization/upsert-organization.ts b/packages/@neet/vschedule-api/src/app/organization/upsert-organization.ts
index 7a12d2d1..ab09811c 100644
--- a/packages/@neet/vschedule-api/src/app/organization/upsert-organization.ts
+++ b/packages/@neet/vschedule-api/src/app/organization/upsert-organization.ts
@@ -3,7 +3,6 @@ import { inject, injectable } from 'inversify';
 
 import {
   IOrganizationFactory,
-  IOrganizationRepository,
   Organization,
   OrganizationDescription,
   OrganizationName,
@@ -12,6 +11,7 @@ import {
 } from '../../domain';
 import { TYPES } from '../../types';
 import { ILogger } from '../_shared';
+import { IOrganizationRepository } from './organization-repository';
 
 export type UpsertOrganizationCommand = {
   readonly name: string;
diff --git a/packages/@neet/vschedule-api/src/app/performer/index.ts b/packages/@neet/vschedule-api/src/app/performer/index.ts
index b830c352..cdb5517a 100644
--- a/packages/@neet/vschedule-api/src/app/performer/index.ts
+++ b/packages/@neet/vschedule-api/src/app/performer/index.ts
@@ -5,6 +5,6 @@
 export * from './list-performers';
 export * from './performer-factory-impl';
 export * from './performer-query-service';
+export * from './performer-repository';
 export * from './show-performer';
-export * from './subscribe-to-performer';
 export * from './upsert-performer';
diff --git a/packages/@neet/vschedule-api/src/app/performer/performer-factory-impl.ts b/packages/@neet/vschedule-api/src/app/performer/performer-factory-impl.ts
index 6b020f90..aae3f07e 100644
--- a/packages/@neet/vschedule-api/src/app/performer/performer-factory-impl.ts
+++ b/packages/@neet/vschedule-api/src/app/performer/performer-factory-impl.ts
@@ -5,7 +5,6 @@ import fetch from 'node-fetch';
 import sharp from 'sharp';
 
 import {
-  IMediaAttachmentRepository,
   IPerformerFactory,
   MediaAttachmentFilename,
   Performer,
@@ -15,6 +14,7 @@ import {
 import { TYPES } from '../../types';
 import { IYoutubeApiService } from '../_external';
 import { AppError, ILogger, UnexpectedError } from '../_shared';
+import { IMediaAttachmentRepository } from '../media-attachment';
 
 export class PerformerFactoryChannelNotFoundError extends AppError {
   public readonly name = 'PerformerFactoryChannelNotFoundError';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/performer/performer-repository.ts b/packages/@neet/vschedule-api/src/app/performer/performer-repository.ts
similarity index 78%
rename from packages/@neet/vschedule-api/src/domain/entities/performer/performer-repository.ts
rename to packages/@neet/vschedule-api/src/app/performer/performer-repository.ts
index bad6c3cf..cd143f37 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/performer/performer-repository.ts
+++ b/packages/@neet/vschedule-api/src/app/performer/performer-repository.ts
@@ -1,6 +1,4 @@
-import { YoutubeChannelId } from '../_shared';
-import { Performer } from './performer';
-import { PerformerId } from './performer-id';
+import { Performer, PerformerId, YoutubeChannelId } from '../../domain';
 
 export interface FindPerformerParams {
   readonly limit?: number;
diff --git a/packages/@neet/vschedule-api/src/app/performer/subscribe-to-performer.ts b/packages/@neet/vschedule-api/src/app/performer/subscribe-to-performer.ts
deleted file mode 100644
index ec61aba1..00000000
--- a/packages/@neet/vschedule-api/src/app/performer/subscribe-to-performer.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-import { inject, injectable } from 'inversify';
-
-import { IPerformerRepository, PerformerId } from '../../domain';
-import { TYPES } from '../../types';
-import { IYoutubeWebsubService } from '../_external';
-
-export interface ResubscribeToPerformerParams {
-  readonly performerId: string;
-}
-
-@injectable()
-export class SubscribeToPerformer {
-  constructor(
-    @inject(TYPES.PerformerRepository)
-    private readonly _performerRepository: IPerformerRepository,
-
-    @inject(TYPES.YoutubeWebsubService)
-    private readonly _youtubeWebsubService: IYoutubeWebsubService,
-  ) {}
-
-  async invoke(params: ResubscribeToPerformerParams): Promise<void> {
-    const performer = await this._performerRepository.findById(
-      new PerformerId(params.performerId),
-    );
-
-    if (performer == null) {
-      throw new Error(`Actor with id ${params.performerId} not found`);
-    }
-
-    if (performer.youtubeChannelId == null) {
-      throw new Error(
-        `Actor with id ${params.performerId} has no youtube channel`,
-      );
-    }
-
-    // TODO: ドメインモデルに書いてイベント的な感じで反映させたい
-    await this._youtubeWebsubService.subscribeToChannel(
-      performer.youtubeChannelId.value,
-    );
-  }
-}
diff --git a/packages/@neet/vschedule-api/src/app/performer/upsert-performer.ts b/packages/@neet/vschedule-api/src/app/performer/upsert-performer.ts
index 45f04e56..0156ef8b 100644
--- a/packages/@neet/vschedule-api/src/app/performer/upsert-performer.ts
+++ b/packages/@neet/vschedule-api/src/app/performer/upsert-performer.ts
@@ -3,7 +3,6 @@ import { inject, injectable } from 'inversify';
 
 import {
   IPerformerFactory,
-  IPerformerRepository,
   OrganizationId,
   OrganizationService,
   Performer,
@@ -13,7 +12,17 @@ import {
   YoutubeChannelId,
 } from '../../domain';
 import { TYPES } from '../../types';
-import { ILogger } from '../_shared';
+import { AppError, ILogger } from '../_shared';
+import { IOrganizationRepository } from '../organization';
+import { IPerformerRepository } from './performer-repository';
+
+export class UpsertPerformerOrganizationNotFoundError extends AppError {
+  readonly name = 'UpsertPerformerOrganizationNotFoundError';
+
+  constructor(id: OrganizationId) {
+    super(`Organization with ID ${id} was not found`);
+  }
+}
 
 export type UpsertPerformerCommand = {
   readonly youtubeChannelId: string;
@@ -37,6 +46,9 @@ export class UpsertPerformer {
     @inject(OrganizationService)
     private readonly _organizationService: OrganizationService,
 
+    @inject(TYPES.OrganizationRepository)
+    private readonly _organizationRepository: IOrganizationRepository,
+
     @inject(TYPES.Logger)
     private readonly _logger: ILogger,
   ) {}
@@ -53,10 +65,18 @@ export class UpsertPerformer {
         : await this.updatePerformer(existingPerformer, command);
 
     if (command.organizationId != null) {
-      await this._organizationService.addPerformer(
+      const organizationId = new OrganizationId(command.organizationId);
+      const existingOrganization = await this._organizationRepository.findById(
+        organizationId,
+      );
+      if (existingOrganization == null) {
+        throw new UpsertPerformerOrganizationNotFoundError(organizationId);
+      }
+      const updatedPerformer = this._organizationService.addPerformer(
         performer,
-        new OrganizationId(command.organizationId),
+        existingOrganization,
       );
+      await this._performerRepository.update(updatedPerformer);
     }
   }
 
diff --git a/packages/@neet/vschedule-api/src/app/resubscription-task/index.ts b/packages/@neet/vschedule-api/src/app/resubscription-task/index.ts
new file mode 100644
index 00000000..f8d54e78
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/app/resubscription-task/index.ts
@@ -0,0 +1,5 @@
+/**
+ * @file Automatically generated by barrelsby.
+ */
+
+export * from './resubscription-task-repository';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/resubscription-task-repository.ts b/packages/@neet/vschedule-api/src/app/resubscription-task/resubscription-task-repository.ts
similarity index 63%
rename from packages/@neet/vschedule-api/src/domain/entities/resubscription-task/resubscription-task-repository.ts
rename to packages/@neet/vschedule-api/src/app/resubscription-task/resubscription-task-repository.ts
index 53c1afd4..e47a4dcb 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/resubscription-task-repository.ts
+++ b/packages/@neet/vschedule-api/src/app/resubscription-task/resubscription-task-repository.ts
@@ -1,4 +1,4 @@
-import { ResubscriptionTask } from './resubscription-task';
+import { ResubscriptionTask } from '../../domain';
 
 export interface IResubscriptionTaskRepository {
   create(task: ResubscriptionTask): Promise<void>;
diff --git a/packages/@neet/vschedule-api/src/app/stream/index.ts b/packages/@neet/vschedule-api/src/app/stream/index.ts
index 84957d34..21878200 100644
--- a/packages/@neet/vschedule-api/src/app/stream/index.ts
+++ b/packages/@neet/vschedule-api/src/app/stream/index.ts
@@ -7,4 +7,5 @@ export * from './remove-stream';
 export * from './show-stream';
 export * from './stream-factory-impl';
 export * from './stream-query-service';
+export * from './stream-repository';
 export * from './upsert-stream';
diff --git a/packages/@neet/vschedule-api/src/app/stream/remove-stream.ts b/packages/@neet/vschedule-api/src/app/stream/remove-stream.ts
index 39937ee8..c4c47ed0 100644
--- a/packages/@neet/vschedule-api/src/app/stream/remove-stream.ts
+++ b/packages/@neet/vschedule-api/src/app/stream/remove-stream.ts
@@ -1,9 +1,9 @@
 import { inject, injectable } from 'inversify';
 import { URL } from 'url';
 
-import { IStreamRepository } from '../../domain';
 import { TYPES } from '../../types';
 import { AppError, ILogger } from '../_shared';
+import { IStreamRepository } from './stream-repository';
 
 export class RemoveStreamNotFoundError extends AppError {
   public readonly name = 'RemoveStreamNotFoundError';
diff --git a/packages/@neet/vschedule-api/src/app/stream/stream-factory-impl.ts b/packages/@neet/vschedule-api/src/app/stream/stream-factory-impl.ts
index fbe413ef..28fc0b6d 100644
--- a/packages/@neet/vschedule-api/src/app/stream/stream-factory-impl.ts
+++ b/packages/@neet/vschedule-api/src/app/stream/stream-factory-impl.ts
@@ -5,36 +5,26 @@ import fetch from 'node-fetch';
 import sharp from 'sharp';
 
 import {
-  IMediaAttachmentRepository,
-  IPerformerRepository,
-  IStreamFactory,
-  IStreamRepository,
   MediaAttachment,
   MediaAttachmentFilename,
   Performer,
+  PerformerId,
   Stream,
   StreamDescription,
   StreamTitle,
   YoutubeChannelId,
 } from '../../domain';
 import { TYPES } from '../../types';
-import { IYoutubeApiService, Video } from '../_external';
+import { Video } from '../_external';
 import { AppError } from '../_shared';
+import { IChannelRepository } from '../channel';
+import { IMediaAttachmentRepository } from '../media-attachment';
+import { IPerformerRepository } from '../performer';
+import { IStreamRepository } from './stream-repository';
 
 const YOUTUBE_CHANNEL_REGEXP =
   /https:\/\/www\.youtube\.com\/channel\/(.+?)(\/|\s|\n|\?)/g;
 
-export class CreateStreamFailedToFetchVideoError extends AppError {
-  public readonly name = 'CreateStreamFailedToFetchVideoError';
-
-  public constructor(
-    public readonly videoId: string,
-    public readonly cause: unknown,
-  ) {
-    super(`No video found with ID ${videoId}`);
-  }
-}
-
 export class CreateStreamPerformerNotFoundWithChannelIdError extends AppError {
   public readonly name = 'CreateStreamPerformerNotFoundWithChannelIdError';
 
@@ -44,39 +34,43 @@ export class CreateStreamPerformerNotFoundWithChannelIdError extends AppError {
 }
 
 @injectable()
-export class StreamFactoryImpl implements IStreamFactory {
+export class StreamFactory {
   public constructor(
-    @inject(TYPES.YoutubeApiService)
-    private readonly _youtubeApiService: IYoutubeApiService,
-
     @inject(TYPES.PerformerRepository)
     private readonly _performerRepository: IPerformerRepository,
 
     @inject(TYPES.MediaAttachmentRepository)
     private readonly _mediaAttachmentRepository: IMediaAttachmentRepository,
 
+    @inject(TYPES.ChannelRepository)
+    private readonly _channelRepository: IChannelRepository,
+
     @inject(TYPES.StreamRepository)
     private readonly _streamRepository: IStreamRepository,
   ) {}
 
-  public async createFromVideoId(videoId: string): Promise<Stream> {
-    const video = await this._fetchVideoById(videoId);
-    const performer = await this._performerRepository.findByYoutubeChannelId(
-      new YoutubeChannelId(video.channelId),
+  public async createFromVideo(video: Video): Promise<Stream> {
+    const youtubeChannelId = new YoutubeChannelId(video.channelId);
+    const channel = await this._fetchChannelFromYoutubeChannel(
+      youtubeChannelId,
     );
+    const thumbnail =
+      video.thumbnailUrl != null
+        ? await this._createThumbnail(video.thumbnailUrl)
+        : null;
 
+    if (!(channel.ownerId instanceof PerformerId)) {
+      throw new Error('Unexpected');
+    }
+
+    const performer = await this._performerRepository.findById(channel.ownerId);
     if (performer == null) {
       throw new CreateStreamPerformerNotFoundWithChannelIdError(
         video.channelId,
       );
     }
 
-    const thumbnail =
-      video.thumbnailUrl != null
-        ? await this._createThumbnail(video.thumbnailUrl)
-        : null;
-
-    const casts = await this._listCasts(video.description);
+    const participants = await this._listParticipants(video.description);
 
     // FIXME オブジェクトの作成以上の責務を負っている気がする
     let stream = await this._streamRepository.findByUrl(new URL(video.url));
@@ -88,15 +82,16 @@ export class StreamFactoryImpl implements IStreamFactory {
         startedAt: video.startedAt != null ? dayjs(video.startedAt) : dayjs(),
         endedAt: video.endedAt != null ? dayjs(video.endedAt) : null,
         ownerId: performer.id,
-        castIds: casts.map((cast) => cast.id),
+        participantIds: participants.map((participant) => participant.id),
         thumbnail,
+        channelId: channel.id,
       });
     }
 
     stream = stream
       .setTitle(new StreamTitle(video.title))
       .setDescription(new StreamDescription(video.description))
-      .setCasts(casts.map((cast) => cast.id));
+      .setParticipantIds(participants.map((participant) => participant.id));
 
     if (thumbnail != null) {
       stream = stream.setThumbnail(thumbnail);
@@ -111,11 +106,24 @@ export class StreamFactoryImpl implements IStreamFactory {
     return stream;
   }
 
+  private async _fetchChannelFromYoutubeChannel(id: YoutubeChannelId) {
+    const channel = await this._channelRepository.findByYoutubeChannelId(id);
+    if (channel == null) {
+      throw new CreateStreamPerformerNotFoundWithChannelIdError(id.value);
+    }
+    return channel;
+  }
+
   private async _createThumbnail(urlStr: string): Promise<MediaAttachment> {
     const url = new URL(urlStr);
+
+    const existing = await this._mediaAttachmentRepository.findByRemoteUrl(url);
+    if (existing) {
+      return existing;
+    }
+
     const image = await fetch(url);
     const imageBuffer = Buffer.from(await image.arrayBuffer());
-
     return await this._mediaAttachmentRepository.save(
       new MediaAttachmentFilename(`${nanoid()}_thumbnail.webp`),
       await sharp(imageBuffer).webp().toBuffer(),
@@ -123,20 +131,10 @@ export class StreamFactoryImpl implements IStreamFactory {
     );
   }
 
-  private async _fetchVideoById(videoId: string): Promise<Video> {
-    try {
-      const video = await this._youtubeApiService.fetchVideo(videoId);
-      return video;
-    } catch (error) {
-      throw new CreateStreamFailedToFetchVideoError(videoId, error);
-    }
-  }
-
-  private async _listCasts(description: string): Promise<Performer[]> {
+  private async _listParticipants(description: string): Promise<Performer[]> {
     const channelIds = [...description.matchAll(YOUTUBE_CHANNEL_REGEXP)]
       .map((match) => match.at(1))
       .filter((match): match is string => match != null);
-
     return this._performerRepository.find({ channelIds });
   }
 }
diff --git a/packages/@neet/vschedule-api/src/domain/entities/stream/stream-repository.ts b/packages/@neet/vschedule-api/src/app/stream/stream-repository.ts
similarity index 78%
rename from packages/@neet/vschedule-api/src/domain/entities/stream/stream-repository.ts
rename to packages/@neet/vschedule-api/src/app/stream/stream-repository.ts
index 1af1269a..608ac69a 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/stream/stream-repository.ts
+++ b/packages/@neet/vschedule-api/src/app/stream/stream-repository.ts
@@ -1,7 +1,7 @@
 import { URL } from 'url';
 
-import { Stream } from './stream';
-import { StreamId } from './stream-id';
+import { Stream } from '../../domain/entities/stream/stream';
+import { StreamId } from '../../domain/entities/stream/stream-id';
 
 export type ListStreamsParams = {
   readonly limit?: number;
diff --git a/packages/@neet/vschedule-api/src/app/stream/upsert-stream.ts b/packages/@neet/vschedule-api/src/app/stream/upsert-stream.ts
index 8a7496eb..8b66b5c2 100644
--- a/packages/@neet/vschedule-api/src/app/stream/upsert-stream.ts
+++ b/packages/@neet/vschedule-api/src/app/stream/upsert-stream.ts
@@ -1,10 +1,23 @@
 import { inject, injectable } from 'inversify';
 
-import { IStreamFactory, IStreamRepository } from '../../domain';
 import { TYPES } from '../../types';
-import { ILogger, UnexpectedError } from '../_shared';
+import { IYoutubeApiService, Video } from '../_external';
+import { AppError, ILogger, UnexpectedError } from '../_shared';
 import { StreamDto } from '../dto';
+import { StreamFactory } from './stream-factory-impl';
 import { IStreamQueryService } from './stream-query-service';
+import { IStreamRepository } from './stream-repository';
+
+export class CreateStreamFailedToFetchVideoError extends AppError {
+  public readonly name = 'CreateStreamFailedToFetchVideoError';
+
+  public constructor(
+    public readonly videoId: string,
+    public readonly cause: unknown,
+  ) {
+    super(`No video found with ID ${videoId}`);
+  }
+}
 
 export type UpsertStreamCommand = {
   readonly videoId: string;
@@ -19,15 +32,19 @@ export class UpsertStream {
     @inject(TYPES.StreamRepository)
     private readonly _streamRepository: IStreamRepository,
 
-    @inject(TYPES.StreamFactory)
-    private readonly _streamFactory: IStreamFactory,
+    @inject(StreamFactory)
+    private readonly _streamFactory: StreamFactory,
 
     @inject(TYPES.Logger)
     private readonly _logger: ILogger,
+
+    @inject(TYPES.YoutubeApiService)
+    private readonly _youtubeApiService: IYoutubeApiService,
   ) {}
 
   async invoke(command: UpsertStreamCommand): Promise<StreamDto> {
-    const stream = await this._streamFactory.createFromVideoId(command.videoId);
+    const video = await this._fetchVideoById(command.videoId);
+    const stream = await this._streamFactory.createFromVideo(video);
     await this._streamRepository.upsert(stream);
 
     this._logger.info(`Stream ${stream.id} "${stream.title}" is created`, {
@@ -35,9 +52,16 @@ export class UpsertStream {
     });
 
     const result = await this._streamQueryService.query(stream.id);
-    if (result == null) {
-      throw new UnexpectedError();
-    }
+    if (result == null) throw new UnexpectedError();
     return result;
   }
+
+  private async _fetchVideoById(videoId: string): Promise<Video> {
+    try {
+      const video = await this._youtubeApiService.fetchVideo(videoId);
+      return video;
+    } catch (error) {
+      throw new CreateStreamFailedToFetchVideoError(videoId, error);
+    }
+  }
 }
diff --git a/packages/@neet/vschedule-api/src/app/token/create-resubscription-task.ts b/packages/@neet/vschedule-api/src/app/token/create-resubscription-task.ts
deleted file mode 100644
index 2616fe06..00000000
--- a/packages/@neet/vschedule-api/src/app/token/create-resubscription-task.ts
+++ /dev/null
@@ -1,91 +0,0 @@
-import dayjs from 'dayjs';
-import { inject, injectable } from 'inversify';
-import { URL } from 'url';
-
-import {
-  IPerformerRepository,
-  TaskService,
-  YoutubeChannelId,
-} from '../../domain';
-import { TYPES } from '../../types';
-import { AppError, IConfig, ILogger } from '../_shared';
-
-export class CreateResubscriptionInvalidVerifyToken extends AppError {
-  // TODO: 長すぎ。モジュール化する
-  public readonly name = 'CreateResubscriptionInvalidVerifyToken';
-
-  public constructor(public readonly token: string) {
-    super(`Invalid verify token ${token}`);
-  }
-}
-
-export class CreateResubscriptionTaskInvalidTopicError extends AppError {
-  // TODO: 長すぎ。モジュール化する
-  public readonly name = 'CreateResubscriptionTaskInvalidTopic';
-
-  public constructor(public readonly topic: string) {
-    super(`Invalid topic ${topic}`);
-  }
-}
-
-export class CreateResubscriptionTaskUnknownActorError extends AppError {
-  // TODO: 長すぎ
-  public readonly name = 'CreateResubscriptionTaskUnknownActorError';
-
-  public constructor(public readonly channelId: string) {
-    super(`No actor associated with yt channel ${channelId}`);
-  }
-}
-
-export interface CreateResubscriptionTaskParams {
-  readonly topic: string;
-  readonly leaseSeconds: number;
-  readonly verifyToken: string;
-}
-
-@injectable()
-export class CreateResubscriptionTask {
-  constructor(
-    @inject(TYPES.PerformerRepository)
-    private readonly _performerRepository: IPerformerRepository,
-
-    @inject(TaskService)
-    private readonly _taskService: TaskService,
-
-    @inject(TYPES.Logger)
-    private readonly _logger: ILogger,
-
-    @inject(TYPES.Config)
-    private readonly _config: IConfig,
-  ) {}
-
-  async invoke(params: CreateResubscriptionTaskParams): Promise<void> {
-    if (params.verifyToken !== this._config.youtube.websubVerifyToken) {
-      throw new CreateResubscriptionInvalidVerifyToken(params.verifyToken);
-    }
-
-    const topic = new URL(params.topic);
-    const channelId = topic.searchParams.get('channel_id');
-    if (channelId == null) {
-      throw new CreateResubscriptionTaskInvalidTopicError(params.topic);
-    }
-
-    const performer = await this._performerRepository.findByYoutubeChannelId(
-      new YoutubeChannelId(channelId),
-    );
-
-    if (performer == null) {
-      throw new CreateResubscriptionTaskUnknownActorError(channelId);
-    }
-
-    const task = await this._taskService.createTask(
-      performer.id,
-      dayjs.unix(params.leaseSeconds),
-    );
-
-    this._logger.info(
-      `Scheduled resubscription for ${topic} in ${params.leaseSeconds} secs`,
-      { task },
-    );
-  }
-}
diff --git a/packages/@neet/vschedule-api/src/app/token/drain-token.ts b/packages/@neet/vschedule-api/src/app/token/drain-token.ts
index f7f73d44..2e10c61d 100644
--- a/packages/@neet/vschedule-api/src/app/token/drain-token.ts
+++ b/packages/@neet/vschedule-api/src/app/token/drain-token.ts
@@ -1,8 +1,9 @@
 import { inject, injectable } from 'inversify';
 
-import { ITokenRepository, TokenId } from '../../domain';
+import { TokenId } from '../../domain';
 import { TYPES } from '../../types';
 import { AppError, ILogger } from '../_shared';
+import { ITokenRepository } from './token-repository';
 
 export class DrainTokenNotFoundError extends AppError {
   public readonly name = 'DrainTokenNotFoundError';
diff --git a/packages/@neet/vschedule-api/src/app/token/index.ts b/packages/@neet/vschedule-api/src/app/token/index.ts
index 080fb4de..f6413132 100644
--- a/packages/@neet/vschedule-api/src/app/token/index.ts
+++ b/packages/@neet/vschedule-api/src/app/token/index.ts
@@ -2,5 +2,5 @@
  * @file Automatically generated by barrelsby.
  */
 
-export * from './create-resubscription-task';
 export * from './drain-token';
+export * from './token-repository';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/token/token-repository.ts b/packages/@neet/vschedule-api/src/app/token/token-repository.ts
similarity index 57%
rename from packages/@neet/vschedule-api/src/domain/entities/token/token-repository.ts
rename to packages/@neet/vschedule-api/src/app/token/token-repository.ts
index 95d2a090..9b746e0c 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/token/token-repository.ts
+++ b/packages/@neet/vschedule-api/src/app/token/token-repository.ts
@@ -1,5 +1,5 @@
-import { Token } from './token';
-import { TokenId } from './token-id';
+import { Token } from '../../domain/entities/token/token';
+import { TokenId } from '../../domain/entities/token/token-id';
 
 export interface ITokenRepository {
   create(token: Token): Promise<Token>;
diff --git a/packages/@neet/vschedule-api/src/app/user/create-user.ts b/packages/@neet/vschedule-api/src/app/user/create-user.ts
index d157174f..52f13c7c 100644
--- a/packages/@neet/vschedule-api/src/app/user/create-user.ts
+++ b/packages/@neet/vschedule-api/src/app/user/create-user.ts
@@ -1,9 +1,10 @@
 import { hashSync } from 'bcryptjs';
 import { inject, injectable } from 'inversify';
 
-import { IUserRepository, User, UserEmail } from '../../domain';
+import { User, UserEmail } from '../../domain';
 import { TYPES } from '../../types';
 import { AppError, IConfig, ILogger } from '../_shared';
+import { IUserRepository } from './user-repository';
 
 export class CreateUserAlreadyExists extends AppError {
   readonly name = 'CreateUserAlreadyExists';
diff --git a/packages/@neet/vschedule-api/src/app/user/index.ts b/packages/@neet/vschedule-api/src/app/user/index.ts
index 6ff0e6ce..8036aa2a 100644
--- a/packages/@neet/vschedule-api/src/app/user/index.ts
+++ b/packages/@neet/vschedule-api/src/app/user/index.ts
@@ -5,3 +5,4 @@
 export * from './create-user';
 export * from './login';
 export * from './show-user';
+export * from './user-repository';
diff --git a/packages/@neet/vschedule-api/src/app/user/login.ts b/packages/@neet/vschedule-api/src/app/user/login.ts
index 89ad897d..55217f94 100644
--- a/packages/@neet/vschedule-api/src/app/user/login.ts
+++ b/packages/@neet/vschedule-api/src/app/user/login.ts
@@ -1,8 +1,9 @@
 import { inject, injectable } from 'inversify';
 
-import { IUserRepository, User, UserEmail } from '../../domain';
+import { User, UserEmail } from '../../domain';
 import { TYPES } from '../../types';
 import { AppError, ILogger } from '../_shared';
+import { IUserRepository } from './user-repository';
 
 export class LoginAccountNotFoundError extends AppError {
   public readonly name = 'LoginAccountNotFoundError';
diff --git a/packages/@neet/vschedule-api/src/app/user/show-user.ts b/packages/@neet/vschedule-api/src/app/user/show-user.ts
index 3955e5b9..a1f44a2d 100644
--- a/packages/@neet/vschedule-api/src/app/user/show-user.ts
+++ b/packages/@neet/vschedule-api/src/app/user/show-user.ts
@@ -1,8 +1,9 @@
 import { inject, injectable } from 'inversify';
 
-import { IUserRepository, User, UserId } from '../../domain';
+import { User, UserId } from '../../domain';
 import { TYPES } from '../../types';
 import { AppError } from '../_shared';
+import { IUserRepository } from './user-repository';
 
 export class ShowUserNotFoundError extends AppError {
   public readonly name = 'ShowUserNotFoundError';
diff --git a/packages/@neet/vschedule-api/src/app/user/user-repository.ts b/packages/@neet/vschedule-api/src/app/user/user-repository.ts
new file mode 100644
index 00000000..09736cdd
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/app/user/user-repository.ts
@@ -0,0 +1,9 @@
+import { User } from '../../domain/entities/user/user';
+import { UserEmail } from '../../domain/entities/user/user-email';
+import { UserId } from '../../domain/entities/user/user-id';
+
+export interface IUserRepository {
+  findById(id: UserId): Promise<User | null>;
+  findByEmail(email: UserEmail): Promise<User | null>;
+  create(user: User): Promise<User>;
+}
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-base.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-base.ts
new file mode 100644
index 00000000..387bbd39
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-base.ts
@@ -0,0 +1,8 @@
+import { Dayjs } from 'dayjs';
+
+export interface IChannel {
+  requestSubscription(): IChannel;
+  verifySubscription(expiresAt: Dayjs): IChannel;
+  canSubscribe(): boolean;
+  isRequested(): boolean;
+}
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-description.spec.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-description.spec.ts
new file mode 100644
index 00000000..e303734f
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-description.spec.ts
@@ -0,0 +1,17 @@
+import {
+  ChannelDescription,
+  ChannelDescriptionLengthError,
+} from './channel-description';
+
+describe('ChannelDescription', () => {
+  it('constructs', () => {
+    const description = new ChannelDescription('hello');
+    expect(description.value).toBe('hello');
+  });
+
+  it('throws and error when description is too long', () => {
+    expect(() => {
+      new ChannelDescription('a'.repeat(5001));
+    }).toThrowError(ChannelDescriptionLengthError);
+  });
+});
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-description.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-description.ts
new file mode 100644
index 00000000..a1db2970
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-description.ts
@@ -0,0 +1,25 @@
+import validator from 'validator';
+
+import { DomainError, ValueObject } from '../../_core';
+
+export class ChannelDescriptionLengthError extends DomainError {
+  public readonly name = 'InvalidChannelDescriptionError';
+
+  public constructor(public readonly value: string) {
+    super(`Description must be 1 to 5000 letters. Got ${value.length}`);
+  }
+}
+
+export class ChannelDescription extends ValueObject<string> {
+  readonly #brand!: never;
+
+  constructor(value: string | ChannelDescription) {
+    if (value instanceof ChannelDescription) {
+      return value;
+    }
+    if (!validator.isLength(value, { min: 1, max: 5000 })) {
+      throw new ChannelDescriptionLengthError(value);
+    }
+    super(value);
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-id.spec.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-id.spec.ts
new file mode 100644
index 00000000..7425f5d1
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-id.spec.ts
@@ -0,0 +1,11 @@
+import { nanoid } from 'nanoid';
+
+import { ChannelId } from './channel-id';
+
+describe('ChannelId', () => {
+  it('can be constructed', () => {
+    const value = nanoid();
+    const id = new ChannelId(value);
+    expect(id.value).toBe(value);
+  });
+});
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-id.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-id.ts
new file mode 100644
index 00000000..05c55968
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-id.ts
@@ -0,0 +1,25 @@
+import { DomainError, isNanoid, ValueObject } from '../../_core';
+
+export class ChannelIdInvalidError extends DomainError {
+  public readonly name = 'ChannelIdInvalidError';
+
+  public constructor(public readonly value: string) {
+    super(`Malformed nanoid. Got ${value}`);
+  }
+}
+
+export class ChannelId extends ValueObject<string> {
+  readonly #brand!: never;
+
+  public constructor(value: string | ChannelId) {
+    if (value instanceof ChannelId) {
+      return value;
+    }
+
+    if (!isNanoid(value)) {
+      throw new ChannelIdInvalidError(value);
+    }
+
+    super(value);
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-name.spec.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-name.spec.ts
new file mode 100644
index 00000000..f5c532fb
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-name.spec.ts
@@ -0,0 +1,14 @@
+import { ChannelName, ChannelNameLengthError } from './channel-name';
+
+describe('ChannelName', () => {
+  it('constructs', () => {
+    const description = new ChannelName('hello');
+    expect(description.value).toBe('hello');
+  });
+
+  it('throws and error when description is too long', () => {
+    expect(() => {
+      new ChannelName('a'.repeat(51));
+    }).toThrow(ChannelNameLengthError);
+  });
+});
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-name.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-name.ts
new file mode 100644
index 00000000..44d55233
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-name.ts
@@ -0,0 +1,27 @@
+import validator from 'validator';
+
+import { DomainError, ValueObject } from '../../_core';
+
+export class ChannelNameLengthError extends DomainError {
+  public readonly name = 'InvalidChannelNameError';
+
+  public constructor(public readonly value: string) {
+    super(
+      `Invalid performer name must be 1 to 50 characters. Got ${value.length}`,
+    );
+  }
+}
+
+export class ChannelName extends ValueObject<string> {
+  readonly #brand!: never;
+
+  public constructor(value: string | ChannelName) {
+    if (value instanceof ChannelName) {
+      return value;
+    }
+    if (!validator.isLength(value, { min: 1, max: 50 })) {
+      throw new ChannelNameLengthError(value);
+    }
+    super(value);
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-status.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-status.ts
new file mode 100644
index 00000000..2b84eae4
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-status.ts
@@ -0,0 +1,5 @@
+export enum ChannelStatus {
+  UNSET = 'unset',
+  REQUESTED = 'requested',
+  VERIFIED = 'verified',
+}
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-youtube.spec.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-youtube.spec.ts
new file mode 100644
index 00000000..c922a245
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-youtube.spec.ts
@@ -0,0 +1,39 @@
+import { nanoid } from 'nanoid';
+
+import { YoutubeChannelId } from '../_shared';
+import { PerformerId } from '../performer';
+import { ChannelId } from './channel-id';
+import { ChannelName } from './channel-name';
+import { ChannelStatus } from './channel-status';
+import { ChannelYoutube } from './channel-youtube';
+
+describe('ChannelYoutube', () => {
+  it('constructs', () => {
+    const entity = ChannelYoutube.create({
+      name: new ChannelName('channel'),
+      description: null,
+      status: ChannelStatus.UNSET,
+      ownerId: new PerformerId(nanoid()),
+      youtubeChannelId: new YoutubeChannelId('123123'),
+    });
+
+    expect(entity.name.value).toBe('channel');
+    expect(entity.status).toBe(ChannelStatus.UNSET);
+  });
+
+  it('rehydrates', () => {
+    const id = nanoid();
+    const entity = ChannelYoutube.rehydrate({
+      id: new ChannelId(id),
+      name: new ChannelName('channel'),
+      description: null,
+      status: ChannelStatus.UNSET,
+      ownerId: new PerformerId(nanoid()),
+      youtubeChannelId: new YoutubeChannelId('123123'),
+    });
+
+    expect(entity.id.value).toBe(id);
+    expect(entity.name.value).toBe('channel');
+    expect(entity.status).toBe(ChannelStatus.UNSET);
+  });
+});
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel-youtube.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-youtube.ts
new file mode 100644
index 00000000..a7380eb6
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel-youtube.ts
@@ -0,0 +1,91 @@
+import { produce } from 'immer';
+import { nanoid } from 'nanoid';
+
+import { AggregateRoot } from '../../_core';
+import { YoutubeChannelId } from '../_shared';
+import { OrganizationId } from '../organization';
+import { PerformerId } from '../performer';
+import { IChannel } from './channel-base';
+import { ChannelDescription } from './channel-description';
+import { ChannelId } from './channel-id';
+import { ChannelName } from './channel-name';
+import { ChannelStatus } from './channel-status';
+
+export type ChannelYoutubeProps = {
+  readonly id: ChannelId;
+  readonly name: ChannelName;
+  readonly description: ChannelDescription | null;
+  readonly status: ChannelStatus;
+  readonly ownerId: OrganizationId | PerformerId;
+  readonly youtubeChannelId: YoutubeChannelId;
+};
+
+const mixins = AggregateRoot<ChannelId, ChannelYoutubeProps>;
+
+export class ChannelYoutube extends mixins implements IChannel {
+  public get id(): ChannelId {
+    return this._props.id;
+  }
+
+  public get name(): ChannelName {
+    return this._props.name;
+  }
+
+  public get description(): ChannelDescription | null {
+    return this._props.description;
+  }
+
+  public get status(): ChannelStatus {
+    return this._props.status;
+  }
+
+  public get ownerId(): OrganizationId | PerformerId {
+    return this._props.ownerId;
+  }
+
+  public get youtubeChannelId(): YoutubeChannelId {
+    return this._props.youtubeChannelId;
+  }
+
+  public resetSubscription(): ChannelYoutube {
+    const props = produce(this._props, (draft) => {
+      draft.status = ChannelStatus.UNSET;
+    });
+    return new ChannelYoutube(props);
+  }
+
+  public requestSubscription(): ChannelYoutube {
+    const props = produce(this._props, (draft) => {
+      draft.status = ChannelStatus.REQUESTED;
+    });
+    return new ChannelYoutube(props);
+  }
+
+  public verifySubscription(): ChannelYoutube {
+    const props = produce(this._props, (draft) => {
+      draft.status = ChannelStatus.VERIFIED;
+    });
+    return new ChannelYoutube(props);
+  }
+
+  public canSubscribe(): boolean {
+    return this._props.status === ChannelStatus.UNSET;
+  }
+
+  public isRequested(): boolean {
+    return this._props.status === ChannelStatus.REQUESTED;
+  }
+
+  public static create(props: Omit<ChannelYoutubeProps, 'id'>) {
+    return new ChannelYoutube({
+      ...props,
+      id: new ChannelId(nanoid()),
+    });
+  }
+
+  public static rehydrate(props: ChannelYoutubeProps) {
+    return new ChannelYoutube({
+      ...props,
+    });
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/channel.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/channel.ts
new file mode 100644
index 00000000..030f17ce
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/channel.ts
@@ -0,0 +1,3 @@
+import { ChannelYoutube } from './channel-youtube';
+
+export type Channel = ChannelYoutube;
diff --git a/packages/@neet/vschedule-api/src/domain/entities/channel/index.ts b/packages/@neet/vschedule-api/src/domain/entities/channel/index.ts
new file mode 100644
index 00000000..7b1199c5
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/entities/channel/index.ts
@@ -0,0 +1,11 @@
+/**
+ * @file Automatically generated by barrelsby.
+ */
+
+export * from './channel';
+export * from './channel-base';
+export * from './channel-description';
+export * from './channel-id';
+export * from './channel-name';
+export * from './channel-status';
+export * from './channel-youtube';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/index.ts b/packages/@neet/vschedule-api/src/domain/entities/index.ts
index 75a951ba..4fa6ecb5 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/index.ts
@@ -4,6 +4,7 @@
 
 export * from './__fixtures__/index';
 export * from './_shared/index';
+export * from './channel/index';
 export * from './media-attachment/index';
 export * from './organization/index';
 export * from './performer/index';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/media-attachment/index.ts b/packages/@neet/vschedule-api/src/domain/entities/media-attachment/index.ts
index 76cbefb8..a6736d33 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/media-attachment/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/media-attachment/index.ts
@@ -6,5 +6,4 @@ export * from './media-attachment';
 export * from './media-attachment-bucket';
 export * from './media-attachment-filename';
 export * from './media-attachment-id';
-export * from './media-attachment-repository';
 export * from './media-attachment-size';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/organization/index.ts b/packages/@neet/vschedule-api/src/domain/entities/organization/index.ts
index 41431fbe..0552340d 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/organization/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/organization/index.ts
@@ -7,4 +7,3 @@ export * from './organization-description';
 export * from './organization-factory';
 export * from './organization-id';
 export * from './organization-name';
-export * from './organization-repository';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/performer/index.ts b/packages/@neet/vschedule-api/src/domain/entities/performer/index.ts
index 7e7513af..4d3fea6d 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/performer/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/performer/index.ts
@@ -7,4 +7,3 @@ export * from './performer-description';
 export * from './performer-factory';
 export * from './performer-id';
 export * from './performer-name';
-export * from './performer-repository';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/index.ts b/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/index.ts
index 4b0ebc5e..24be45a5 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/index.ts
@@ -3,4 +3,3 @@
  */
 
 export * from './resubscription-task';
-export * from './resubscription-task-repository';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/resubscription-task.ts b/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/resubscription-task.ts
index 08ce1a80..57cba288 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/resubscription-task.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/resubscription-task/resubscription-task.ts
@@ -1,17 +1,15 @@
 import { Dayjs } from 'dayjs';
 
 import { AggregateRoot, Recipe } from '../../_core';
-import { PerformerId } from '../performer';
+import { ChannelId } from '../channel';
 import { Token, TokenId } from '../token';
 
 export interface ResubscriptionTaskProps {
   // 要らないと思う。
   readonly id: TokenId;
-  // should rather be a DataSourceId or something
-  readonly performerId: PerformerId;
+  readonly channelId: ChannelId;
   readonly token: Token;
   readonly scheduledAt: Dayjs;
-  // type: 'youtube'
 }
 
 export class ResubscriptionTask extends AggregateRoot<
@@ -22,8 +20,8 @@ export class ResubscriptionTask extends AggregateRoot<
     return this._props.token.id;
   }
 
-  get performerId(): PerformerId {
-    return this._props.performerId;
+  get channelId(): ChannelId {
+    return this._props.channelId;
   }
 
   get token(): Token {
@@ -37,7 +35,7 @@ export class ResubscriptionTask extends AggregateRoot<
   public static create(props: Omit<Recipe<ResubscriptionTaskProps>, 'id'>) {
     return new ResubscriptionTask({
       id: props.token.id,
-      performerId: new PerformerId(props.performerId),
+      channelId: new ChannelId(props.channelId),
       token: props.token,
       scheduledAt: props.scheduledAt,
     });
@@ -46,7 +44,7 @@ export class ResubscriptionTask extends AggregateRoot<
   public static rehydrate(props: Omit<Recipe<ResubscriptionTaskProps>, 'id'>) {
     return new ResubscriptionTask({
       id: props.token.id,
-      performerId: new PerformerId(props.performerId),
+      channelId: new ChannelId(props.channelId),
       token: props.token,
       scheduledAt: props.scheduledAt,
     });
diff --git a/packages/@neet/vschedule-api/src/domain/entities/stream/index.ts b/packages/@neet/vschedule-api/src/domain/entities/stream/index.ts
index a70abc47..f1c62af7 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/stream/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/stream/index.ts
@@ -4,7 +4,5 @@
 
 export * from './stream';
 export * from './stream-description';
-export * from './stream-factory';
 export * from './stream-id';
-export * from './stream-repository';
 export * from './stream-title';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/stream/stream-factory.ts b/packages/@neet/vschedule-api/src/domain/entities/stream/stream-factory.ts
deleted file mode 100644
index fc6abb80..00000000
--- a/packages/@neet/vschedule-api/src/domain/entities/stream/stream-factory.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-import { Stream } from './stream';
-
-export interface IStreamFactory {
-  createFromVideoId(videoId: string): Promise<Stream>;
-}
diff --git a/packages/@neet/vschedule-api/src/domain/entities/stream/stream.spec.ts b/packages/@neet/vschedule-api/src/domain/entities/stream/stream.spec.ts
index d56c58a9..4df5e267 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/stream/stream.spec.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/stream/stream.spec.ts
@@ -1,8 +1,10 @@
 import dayjs from 'dayjs';
+import { nanoid } from 'nanoid';
 import { URL } from 'url';
 
 import { actorFixture } from '../__fixtures__';
 import { Timestamps } from '../_shared';
+import { ChannelId } from '../channel';
 import { Stream } from './stream';
 import { StreamId } from './stream-id';
 import { StreamTitle } from './stream-title';
@@ -15,7 +17,8 @@ describe('Stream', () => {
       url: new URL('https://www.youtube.com/watch?v=TT5b3BzsZyI'),
       description: `総勢58名のライバーが出演するにじさんじのユニット歌謡祭です。いつもお馴染みのユニットや少しレアなユニットも…？`,
       ownerId: actorFixture.id,
-      castIds: [],
+      participantIds: [],
+      channelId: new ChannelId(nanoid()),
       timestamps: new Timestamps({
         createdAt: dayjs('2021-01-01T00:00:00+09:00'),
         updatedAt: dayjs('2021-01-01T00:00:00+09:00'),
@@ -34,7 +37,8 @@ describe('Stream', () => {
       title: 'test',
       url: new URL('https://example.com'),
       ownerId: actorFixture.id,
-      castIds: [],
+      participantIds: [],
+      channelId: new ChannelId(nanoid()),
       description: null,
       thumbnail: null,
       endedAt: null,
diff --git a/packages/@neet/vschedule-api/src/domain/entities/stream/stream.ts b/packages/@neet/vschedule-api/src/domain/entities/stream/stream.ts
index 647d9e57..3597a92d 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/stream/stream.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/stream/stream.ts
@@ -6,6 +6,7 @@ import { URL } from 'url';
 
 import { AggregateRoot, DomainError, RehydrateParameters } from '../../_core';
 import { ITimestamps, TimestampMixin, Timestamps } from '../_shared';
+import { ChannelId } from '../channel';
 import { MediaAttachment } from '../media-attachment';
 import { PerformerId } from '../performer';
 import { StreamDescription } from './stream-description';
@@ -33,18 +34,19 @@ export class StreamAlreadyEndedError extends DomainError {
   }
 }
 
-export interface StreamProps {
+export type StreamProps = {
   readonly id: StreamId;
   readonly title: StreamTitle;
   readonly url: URL;
+  readonly channelId: ChannelId;
   readonly ownerId: PerformerId;
-  readonly castIds: readonly PerformerId[];
+  readonly participantIds: readonly PerformerId[];
   readonly startedAt: Dayjs;
   readonly timestamps: Timestamps;
   readonly description: StreamDescription | null;
   readonly thumbnail: MediaAttachment | null;
   readonly endedAt: Dayjs | null;
-}
+};
 
 const mixins = Mixin(AggregateRoot<StreamId, StreamProps>, TimestampMixin);
 
@@ -89,9 +91,12 @@ export class Stream extends mixins implements ITimestamps {
     return this._props.ownerId;
   }
 
-  // TODO: participantsとかにすればよかった。
-  public get castIds(): readonly PerformerId[] {
-    return this._props.castIds;
+  public get channelId(): ChannelId {
+    return this._props.channelId;
+  }
+
+  public get participantIds(): readonly PerformerId[] {
+    return this._props.participantIds;
   }
 
   setTitle(title: StreamTitle) {
@@ -134,9 +139,9 @@ export class Stream extends mixins implements ITimestamps {
     return new Stream(props);
   }
 
-  setCasts(castIds: PerformerId[]) {
+  setParticipantIds(participantIds: PerformerId[]) {
     const props = produce(this._props, (draft) => {
-      draft.castIds = castIds;
+      draft.participantIds = participantIds;
       draft.timestamps = draft.timestamps.update();
     });
     return new Stream(props);
@@ -166,7 +171,8 @@ export class Stream extends mixins implements ITimestamps {
       title: new StreamTitle(props.title),
       url: props.url,
       ownerId: new PerformerId(props.ownerId),
-      castIds: props.castIds,
+      participantIds: props.participantIds,
+      channelId: new ChannelId(props.channelId),
       thumbnail: props.thumbnail,
       description:
         props.description !== null
diff --git a/packages/@neet/vschedule-api/src/domain/entities/token/index.ts b/packages/@neet/vschedule-api/src/domain/entities/token/index.ts
index ef12ff84..dbd506ef 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/token/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/token/index.ts
@@ -4,4 +4,3 @@
 
 export * from './token';
 export * from './token-id';
-export * from './token-repository';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/user/index.ts b/packages/@neet/vschedule-api/src/domain/entities/user/index.ts
index b32f7cde..f52cce5d 100644
--- a/packages/@neet/vschedule-api/src/domain/entities/user/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/entities/user/index.ts
@@ -5,4 +5,3 @@
 export * from './user';
 export * from './user-email';
 export * from './user-id';
-export * from './user-repository';
diff --git a/packages/@neet/vschedule-api/src/domain/entities/user/user-repository.ts b/packages/@neet/vschedule-api/src/domain/entities/user/user-repository.ts
deleted file mode 100644
index bfba0d8c..00000000
--- a/packages/@neet/vschedule-api/src/domain/entities/user/user-repository.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-import { User } from './user';
-import { UserEmail } from './user-email';
-import { UserId } from './user-id';
-
-export interface IUserRepository {
-  findById(id: UserId): Promise<User | null>;
-  findByEmail(email: UserEmail): Promise<User | null>;
-  create(user: User): Promise<User>;
-}
diff --git a/packages/@neet/vschedule-api/src/domain/services/channel-service.ts b/packages/@neet/vschedule-api/src/domain/services/channel-service.ts
new file mode 100644
index 00000000..08581798
--- /dev/null
+++ b/packages/@neet/vschedule-api/src/domain/services/channel-service.ts
@@ -0,0 +1,59 @@
+import { Dayjs } from 'dayjs';
+import { injectable } from 'inversify';
+
+import { DomainError } from '../_core';
+import {
+  Channel,
+  ChannelId,
+  ChannelYoutube,
+  ResubscriptionTask,
+  Token,
+} from '../entities';
+
+export class ChannelServiceChannelNotFoundError extends DomainError {
+  public readonly name = 'ChannelServiceChannelNotFoundError';
+
+  public constructor(public readonly id: ChannelId) {
+    super(`No channel found with id ${id}`);
+  }
+}
+
+export class ChannelServiceChannelNotRequestedError extends DomainError {
+  public readonly name = 'ChannelServiceChannelNotRequestedError';
+
+  public constructor(public readonly id: ChannelId) {
+    super(`Tried to start subscription of ${id} but not yet requested`);
+  }
+}
+
+export type VerifySubscriptionResult = {
+  channel: Channel;
+  token: Token;
+  resubscriptionTask: ResubscriptionTask;
+};
+
+@injectable()
+export class ChannelService {
+  public verifySubscription(
+    channel: Channel,
+    scheduledAt: Dayjs,
+  ): VerifySubscriptionResult {
+    if (!channel.isRequested()) {
+      throw new ChannelServiceChannelNotRequestedError(channel.id);
+    }
+
+    if (channel instanceof ChannelYoutube) {
+      const newChannel = channel.verifySubscription();
+      const token = Token.create();
+      const resubscriptionTask = ResubscriptionTask.create({
+        token,
+        scheduledAt,
+        channelId: newChannel.id,
+      });
+
+      return { channel: newChannel, token, resubscriptionTask };
+    }
+
+    throw new Error('Unreachable');
+  }
+}
diff --git a/packages/@neet/vschedule-api/src/domain/services/index.ts b/packages/@neet/vschedule-api/src/domain/services/index.ts
index 75d8dc6f..d55813f4 100644
--- a/packages/@neet/vschedule-api/src/domain/services/index.ts
+++ b/packages/@neet/vschedule-api/src/domain/services/index.ts
@@ -2,5 +2,5 @@
  * @file Automatically generated by barrelsby.
  */
 
+export * from './channel-service';
 export * from './organization-service';
-export * from './task-service';
diff --git a/packages/@neet/vschedule-api/src/domain/services/organization-service.ts b/packages/@neet/vschedule-api/src/domain/services/organization-service.ts
index 6e9aa71e..626b457b 100644
--- a/packages/@neet/vschedule-api/src/domain/services/organization-service.ts
+++ b/packages/@neet/vschedule-api/src/domain/services/organization-service.ts
@@ -1,58 +1,18 @@
-import { inject, injectable } from 'inversify';
+import { injectable } from 'inversify';
 
-import { TYPES } from '../../types';
-import { DomainError } from '../_core';
-import {
-  IOrganizationRepository,
-  IPerformerRepository,
-  OrganizationId,
-  Performer,
-  PerformerId,
-} from '../entities';
-
-export class AddPerformerToOrganizationServiceNotFoundError extends DomainError {
-  public readonly name = 'AddPerformerToOrganizationServiceNotFoundError';
-
-  constructor(
-    public readonly performerId: PerformerId,
-    public readonly organizationId: OrganizationId,
-  ) {
-    super(
-      `Performer ${performerId} tried to join non-existing organization ${organizationId}`,
-    );
-  }
-}
+import { Organization, Performer } from '../entities';
 
 @injectable()
 export class OrganizationService {
-  public constructor(
-    @inject(TYPES.OrganizationRepository)
-    private readonly _organizationRepository: IOrganizationRepository,
-
-    @inject(TYPES.PerformerRepository)
-    private readonly _performerRepository: IPerformerRepository,
-  ) {}
-
-  public async addPerformer(
+  public addPerformer(
     performer: Performer,
-    organizationId: OrganizationId,
-  ): Promise<void> {
-    const organization = await this._organizationRepository.findById(
-      organizationId,
-    );
-
-    if (organization == null) {
-      throw new AddPerformerToOrganizationServiceNotFoundError(
-        performer.id,
-        organizationId,
-      );
-    }
-
+    organization: Organization,
+  ): Performer {
     if (performer.hasJoinedToOrganization(organization.id)) {
-      return;
+      return performer;
     }
 
-    const newPerformer = performer.joinOrganization(organizationId);
-    await this._performerRepository.update(newPerformer);
+    const newPerformer = performer.joinOrganization(organization.id);
+    return newPerformer;
   }
 }
diff --git a/packages/@neet/vschedule-api/src/domain/services/task-service.ts b/packages/@neet/vschedule-api/src/domain/services/task-service.ts
deleted file mode 100644
index 2c128117..00000000
--- a/packages/@neet/vschedule-api/src/domain/services/task-service.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-import { Dayjs } from 'dayjs';
-import { inject, injectable } from 'inversify';
-
-import { TYPES } from '../../types';
-import {
-  IResubscriptionTaskRepository,
-  ITokenRepository,
-  PerformerId,
-  ResubscriptionTask,
-  Token,
-} from '../entities';
-
-@injectable()
-export class TaskService {
-  constructor(
-    @inject(TYPES.ResubscriptionTaskRepository)
-    private _resubscriptionTaskRepository: IResubscriptionTaskRepository,
-
-    @inject(TYPES.TokenRepository)
-    private _tokenRepository: ITokenRepository,
-  ) {}
-
-  async createTask(
-    performerId: PerformerId,
-    scheduledAt: Dayjs,
-  ): Promise<ResubscriptionTask> {
-    // 集約にしたい
-    const token = Token.create();
-    await this._tokenRepository.create(token);
-    const task = ResubscriptionTask.create({
-      performerId: performerId,
-      scheduledAt,
-      token: token,
-    });
-    await this._resubscriptionTaskRepository.create(task);
-    return task;
-  }
-}
diff --git a/packages/@neet/vschedule-api/src/infra/app.ts b/packages/@neet/vschedule-api/src/infra/app.ts
index 6e9e27b3..d8b1c180 100644
--- a/packages/@neet/vschedule-api/src/infra/app.ts
+++ b/packages/@neet/vschedule-api/src/infra/app.ts
@@ -12,6 +12,7 @@ import winston from 'winston';
 
 import {
   AuthController,
+  ChannelController,
   MediaAttachmentController,
   OrganizationsController,
   PerformersController,
@@ -82,6 +83,7 @@ export class App {
       defaultErrorHandler: false,
       controllers: [
         AuthController,
+        ChannelController,
         MediaAttachmentController,
         OrganizationsController,
         PerformersController,
diff --git a/packages/@neet/vschedule-api/src/infra/middlewares/app-error-handler.ts b/packages/@neet/vschedule-api/src/infra/middlewares/app-error-handler.ts
index d2de5cdc..1f096ee7 100644
--- a/packages/@neet/vschedule-api/src/infra/middlewares/app-error-handler.ts
+++ b/packages/@neet/vschedule-api/src/infra/middlewares/app-error-handler.ts
@@ -3,8 +3,6 @@ import { ErrorRequestHandler, Response } from 'express';
 import * as Rest from '../../adapters/generated/@types';
 import {
   AppError,
-  CreateResubscriptionTaskInvalidTopicError,
-  CreateResubscriptionTaskUnknownActorError,
   DrainTokenNotFoundError,
   RemoveStreamNotFoundError,
   ShowMediaAttachmentNotFoundError,
@@ -37,12 +35,6 @@ export const appErrorHandler: ErrorRequestHandler = (
   if (error instanceof RemoveStreamNotFoundError) {
     res.status(404);
   }
-  if (error instanceof CreateResubscriptionTaskUnknownActorError) {
-    res.status(403);
-  }
-  if (error instanceof CreateResubscriptionTaskInvalidTopicError) {
-    res.status(403);
-  }
   if (error instanceof ShowMediaAttachmentNotFoundError) {
     res.status(404);
   }
diff --git a/packages/@neet/vschedule-api/src/infra/services/config-environment.ts b/packages/@neet/vschedule-api/src/infra/services/config-environment.ts
index ce850f5d..08fcc519 100644
--- a/packages/@neet/vschedule-api/src/infra/services/config-environment.ts
+++ b/packages/@neet/vschedule-api/src/infra/services/config-environment.ts
@@ -13,7 +13,6 @@ export class ConfigEnvironment extends ConfigBase implements IConfig {
       youtube: {
         dataApiKey: env('YOUTUBE_DATA_API_KEY'),
         websubHmacSecret: env('YOUTUBE_WEBSUB_HMAC_SECRET'),
-        websubVerifyToken: env('YOUTUBE_WEBSUB_VERIFY_TOKEN'),
       },
       storage: {
         type: env('STORAGE_TYPE'),
diff --git a/packages/@neet/vschedule-api/src/infra/services/youtube-websub-service.ts b/packages/@neet/vschedule-api/src/infra/services/youtube-websub-service.ts
index 190e20cf..c090db26 100644
--- a/packages/@neet/vschedule-api/src/infra/services/youtube-websub-service.ts
+++ b/packages/@neet/vschedule-api/src/infra/services/youtube-websub-service.ts
@@ -8,7 +8,6 @@ import { TYPES } from '../../types';
 @injectable()
 export class YoutubeWebsubService implements IYoutubeWebsubService {
   private readonly _hmacSecret: string;
-  private readonly _verifyToken: string;
   private readonly _callbackUrl: string;
 
   public constructor(
@@ -17,7 +16,6 @@ export class YoutubeWebsubService implements IYoutubeWebsubService {
   ) {
     this._callbackUrl = utils.resolvePath(config, '/websub/youtube');
     this._hmacSecret = config.youtube.websubHmacSecret;
-    this._verifyToken = config.youtube.websubVerifyToken;
   }
 
   public async subscribeToChannel(channelId: string): Promise<void> {
@@ -32,7 +30,6 @@ export class YoutubeWebsubService implements IYoutubeWebsubService {
         'hub.callback': this._callbackUrl,
         'hub.verify': 'async',
         'hub.secret': this._hmacSecret,
-        'hub.verify_token': this._verifyToken,
         'hub.lease_seconds': '',
       }),
     });
diff --git a/packages/@neet/vschedule-api/src/types.ts b/packages/@neet/vschedule-api/src/types.ts
index f497d7cc..0205dbb0 100644
--- a/packages/@neet/vschedule-api/src/types.ts
+++ b/packages/@neet/vschedule-api/src/types.ts
@@ -12,7 +12,7 @@ export const TYPES = Object.freeze({
   ResubscriptionTaskRepository: Symbol('ResubscriptionTaskRepository'),
   TokenRepository: Symbol('TokenRepository'),
   UserRepository: Symbol('UserRepository'),
-  StreamFactory: Symbol('StreamFactory'),
+  ChannelRepository: Symbol('ChannelRepository'),
 
   StreamQueryService: Symbol('StreamQueryService'),
   PerformerQueryService: Symbol('PerformerQueryService'),
diff --git a/packages/@neet/vschedule-api/test-utils/db-seed.ts b/packages/@neet/vschedule-api/test-utils/db-seed.ts
index d82e3ef0..1490c7e6 100644
--- a/packages/@neet/vschedule-api/test-utils/db-seed.ts
+++ b/packages/@neet/vschedule-api/test-utils/db-seed.ts
@@ -2,9 +2,12 @@ import { PrismaClient } from '@prisma/client';
 import { hashSync } from 'bcryptjs';
 
 import { IConfig } from '../src/app';
+import { ChannelStatus } from '../src/domain';
 
 export const SEED_ORGANIZATION_ID = 'x8WCU1lK79smcYy_mk_1V';
+export const SEED_ORGANIZATION_CHANNEL_ID = '-RnZamjeWZ8LlxmWuZ08E';
 export const SEED_PERFORMER_ID = '1ebCtG0ZwzyfEuMCE3iyE';
+export const SEED_PERFORMER_CHANNEL_ID = 'Vxdwf6mbYBVwKtya36cW6';
 export const SEED_STREAM_ID = '7HQVgnsDEOorzKgjNKJ6n';
 export const SEED_USER_ID = 'rrCoMB5uaoqjDNU79_oFT';
 
@@ -21,6 +24,33 @@ export const createSeed = async (config: IConfig): Promise<void> => {
     },
   });
 
+  await client.channel.create({
+    data: {
+      id: SEED_ORGANIZATION_CHANNEL_ID,
+      name: 'にじさんじ公式チャンネル',
+      description: null,
+      status: ChannelStatus.UNSET,
+      youtubeChannel: {
+        create: {
+          youtubeChannelId: 'UCX7YkU9nEeaoZbkVLVajcMg',
+        },
+      },
+    },
+  });
+  await client.channel.create({
+    data: {
+      id: SEED_PERFORMER_CHANNEL_ID,
+      name: '鷹宮リオンチャンネル',
+      description: null,
+      status: ChannelStatus.UNSET,
+      youtubeChannel: {
+        create: {
+          youtubeChannelId: 'UCV5ZZlLjk5MKGg3L0n0vbzw',
+        },
+      },
+    },
+  });
+
   await client.organization.create({
     data: {
       id: SEED_ORGANIZATION_ID,
@@ -30,6 +60,13 @@ export const createSeed = async (config: IConfig): Promise<void> => {
       description: `「にじさんじ」は、人気バーチャルライバー（VTuber）を始めとして、個性を存分に活かした多種多様なインフルエンサーが所属するバーチャルライバープロジェクトです。`,
       youtubeChannelId: 'UCX7YkU9nEeaoZbkVLVajcMg',
       twitterUsername: 'nijisanji_app',
+      channels: {
+        connect: [
+          {
+            id: SEED_ORGANIZATION_CHANNEL_ID,
+          },
+        ],
+      },
       createdAt: new Date('2022-11-03T12:06:13.481Z'),
       updatedAt: new Date('2022-11-03T12:06:13.481Z'),
     },
@@ -49,6 +86,13 @@ export const createSeed = async (config: IConfig): Promise<void> => {
           id: SEED_ORGANIZATION_ID,
         },
       },
+      channels: {
+        connect: [
+          {
+            id: SEED_PERFORMER_CHANNEL_ID,
+          },
+        ],
+      },
       createdAt: new Date('2022-11-03T12:11:17.260Z'),
       updatedAt: new Date('2022-11-03T12:11:17.260Z'),
     },
@@ -64,6 +108,11 @@ export const createSeed = async (config: IConfig): Promise<void> => {
       updatedAt: new Date('2022-11-03T12:11:17.260Z'),
       startedAt: new Date('2022-11-03T12:11:17.260Z'),
       endedAt: new Date('2022-11-03T12:11:17.260Z'),
+      channel: {
+        connect: {
+          id: SEED_PERFORMER_CHANNEL_ID,
+        },
+      },
       owner: {
         connect: {
           id: SEED_PERFORMER_ID,
diff --git a/packages/@neet/vschedule-api/test/rest/v1/channels.spec.ts b/packages/@neet/vschedule-api/test/rest/v1/channels.spec.ts
new file mode 100644
index 00000000..9e5c3339
--- /dev/null
+++ b/packages/@neet/vschedule-api/test/rest/v1/channels.spec.ts
@@ -0,0 +1,46 @@
+import { advanceTo, clear } from 'jest-date-mock';
+
+import { ResubscriptionTaskRepositoryInMemory } from '../../../src/adapters';
+import { TYPES } from '../../../src/types';
+import { createAPI } from '../../../test-utils/api';
+import { SEED_PERFORMER_CHANNEL_ID } from '../../../test-utils/db-seed';
+import { container } from '../../../test-utils/inversify-config';
+
+describe('ChannelController', () => {
+  beforeEach(() => {
+    advanceTo(0);
+  });
+
+  afterEach(() => {
+    clear();
+  });
+
+  it('subscribes to a channel', async () => {
+    const { api } = createAPI();
+
+    // request
+    await api.rest.v1.channels
+      ._channelId(SEED_PERFORMER_CHANNEL_ID)
+      .subscribe.$post();
+
+    // verify
+    const result = await api.websub.youtube.get({
+      query: {
+        'hub.topic': `https://www.youtube.com/xml/feeds/videos.xml?channel_id=UCV5ZZlLjk5MKGg3L0n0vbzw`,
+        'hub.challenge': '4605398436710972921',
+        'hub.mode': 'subscribe',
+        'hub.verify_token': '',
+        'hub.lease_seconds': 432000,
+      },
+    });
+
+    const repository = container.get<ResubscriptionTaskRepositoryInMemory>(
+      TYPES.ResubscriptionTaskRepository,
+    );
+
+    expect(result.status).toBe(200);
+    expect(repository.tasks.at(0)?.scheduledAt.toISOString()).toBe(
+      '1970-01-06T00:00:00.000Z',
+    );
+  });
+});
diff --git a/packages/@neet/vschedule-api/test/rest/v1/performer.spec.ts b/packages/@neet/vschedule-api/test/rest/v1/performer.spec.ts
deleted file mode 100644
index f31f2963..00000000
--- a/packages/@neet/vschedule-api/test/rest/v1/performer.spec.ts
+++ /dev/null
@@ -1,40 +0,0 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-import dayjs from 'dayjs';
-
-import { PerformerId } from '../../../src/domain';
-import { TaskService } from '../../../src/domain/services/task-service';
-import { mockYoutubeWebsubService } from '../../../test-utils/mock-youtube-websub-service';
-import { createAPI } from '../../../test-utils/api';
-import { SEED_PERFORMER_ID } from '../../../test-utils/db-seed';
-import { container } from '../../../test-utils/inversify-config';
-
-describe('Performer', () => {
-  it('cannot subscribe to a performer without token', async () => {
-    const { api } = createAPI();
-
-    await expect(
-      api.rest.v1.performers._performerId(SEED_PERFORMER_ID).subscribe.post(),
-    ).rejects.toMatchObject({
-      status: 401,
-    });
-  });
-
-  it('can subscribe to a performer with token', async () => {
-    const { supertest } = createAPI();
-
-    const taskService = container.get(TaskService);
-    const task = await taskService.createTask(
-      new PerformerId(SEED_PERFORMER_ID),
-      dayjs().add(30, 'days'),
-    );
-
-    const res = await supertest
-      .post(`/rest/v1/performers/${SEED_PERFORMER_ID}/subscribe`)
-      .set('X-Authentication', task.token.id.value);
-
-    expect(res.status).toBe(202);
-    expect(mockYoutubeWebsubService.subscribeToChannel).toBeCalledWith(
-      'UCV5ZZlLjk5MKGg3L0n0vbzw',
-    );
-  });
-});
diff --git a/packages/@neet/vschedule-api/test/rest/v1/performers.spec.ts b/packages/@neet/vschedule-api/test/rest/v1/performers.spec.ts
new file mode 100644
index 00000000..a4443133
--- /dev/null
+++ b/packages/@neet/vschedule-api/test/rest/v1/performers.spec.ts
@@ -0,0 +1,21 @@
+import { createAPI } from '../../../test-utils/api';
+import { SEED_PERFORMER_ID } from '../../../test-utils/db-seed';
+
+describe('PerformerController', () => {
+  it('shows a single performer', async () => {
+    const { api } = createAPI();
+
+    const performer = await api.rest.v1.performers
+      ._performerId(SEED_PERFORMER_ID)
+      .$get();
+
+    expect(performer.name).toBe('鷹宮リオン');
+  });
+
+  it('shows multiple performers', async () => {
+    const { api } = createAPI();
+
+    const performer = await api.rest.v1.performers.$get();
+    expect(performer.at(0)?.name).toBe('鷹宮リオン');
+  });
+});
diff --git a/packages/@neet/vschedule-api/test/rest/v1/streams.spec.ts b/packages/@neet/vschedule-api/test/rest/v1/streams.spec.ts
index fcadce6e..8c5b6dd9 100644
--- a/packages/@neet/vschedule-api/test/rest/v1/streams.spec.ts
+++ b/packages/@neet/vschedule-api/test/rest/v1/streams.spec.ts
@@ -1,7 +1,17 @@
 import { createAPI } from '../../../test-utils/api';
+import { SEED_STREAM_ID } from '../../../test-utils/db-seed';
 
 describe('StreamController', () => {
-  it('can list streams', async () => {
+  it('shows a single stream', async () => {
+    const { api } = createAPI();
+    const data = await api.rest.v1.streams._streamId(SEED_STREAM_ID).$get();
+
+    expect(data.title).toBe(
+      '【3Dお披露目】ファンボファンガに、最後まで最高のファンサ【#鷹宮リオン3D】',
+    );
+  });
+
+  it('shows multiple streams', async () => {
     const { api } = createAPI();
     const data = await api.rest.v1.streams.$get();
 
diff --git a/packages/@neet/vschedule-api/test/websub.spec.ts b/packages/@neet/vschedule-api/test/websub.spec.ts
index eb5e2ec1..e77f7f50 100644
--- a/packages/@neet/vschedule-api/test/websub.spec.ts
+++ b/packages/@neet/vschedule-api/test/websub.spec.ts
@@ -1,12 +1,13 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import { createHmac } from 'crypto';
-import { advanceTo, clear } from 'jest-date-mock';
 
-import { ResubscriptionTaskRepositoryInMemory } from '../src/adapters/repositories';
 import { IConfig } from '../src/app';
 import { TYPES } from '../src/types';
 import { createAPI } from '../test-utils/api';
-import { SEED_STREAM_ID } from '../test-utils/db-seed';
+import {
+  SEED_PERFORMER_CHANNEL_ID,
+  SEED_STREAM_ID,
+} from '../test-utils/db-seed';
 import { container } from '../test-utils/inversify-config';
 import {
   ytWebsubStreamDeleted,
@@ -21,33 +22,6 @@ describe('/websub/youtube', () => {
     config = container.get<IConfig>(TYPES.Config);
   });
 
-  it('verifies WebSub subscription', async () => {
-    const { api } = createAPI();
-    advanceTo(0);
-
-    const token = config.youtube.websubVerifyToken ?? '';
-    const result = await api.websub.youtube.get({
-      query: {
-        'hub.topic': `https://www.youtube.com/xml/feeds/videos.xml?channel_id=UCV5ZZlLjk5MKGg3L0n0vbzw`,
-        'hub.challenge': '4605398436710972921',
-        'hub.mode': 'subscribe',
-        'hub.lease_seconds': 432000,
-        'hub.verify_token': token,
-      } as any,
-    });
-
-    const repository = container.get<ResubscriptionTaskRepositoryInMemory>(
-      TYPES.ResubscriptionTaskRepository,
-    );
-
-    expect(result.status).toBe(200);
-    expect(repository.tasks.at(0)?.scheduledAt.toISOString()).toBe(
-      '1970-01-06T00:00:00.000Z',
-    );
-
-    clear();
-  });
-
   it('receives Atom feed', async () => {
     const { api, supertest } = createAPI();
     const hmac = createHmac('sha1', config.youtube.websubHmacSecret);
@@ -73,6 +47,7 @@ describe('/websub/youtube', () => {
     );
     expect(stream?.owner?.name).toBe('鷹宮リオン');
     expect(stream?.owner?.organization?.name).toBe('にじさんじ');
+    expect(stream?.channelId).toBe(SEED_PERFORMER_CHANNEL_ID);
   });
 
   it('updates Atom feed', async () => {
diff --git a/packages/@neet/vschedule-client/package.json b/packages/@neet/vschedule-client/package.json
index 05392890..ee2c8ff6 100644
--- a/packages/@neet/vschedule-client/package.json
+++ b/packages/@neet/vschedule-client/package.json
@@ -41,7 +41,7 @@
     "isomorphic-unfetch": "^3.1.0",
     "mousetrap": "^1.6.5",
     "next": "12.3.3",
-    "openapi2aspida": "^0.19.0",
+    "openapi2aspida": "^0.20.0",
     "polished": "^4.1.3",
     "postcss": "^8.4.18",
     "react": "17.0.2",
diff --git a/yarn.lock b/yarn.lock
index 2892682f..b97241d7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -15,7 +15,18 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@apidevtools/json-schema-ref-parser@npm:9.0.9, @apidevtools/json-schema-ref-parser@npm:^9.0.6":
+"@apidevtools/json-schema-ref-parser@npm:9.0.6":
+  version: 9.0.6
+  resolution: "@apidevtools/json-schema-ref-parser@npm:9.0.6"
+  dependencies:
+    "@jsdevtools/ono": ^7.1.3
+    call-me-maybe: ^1.0.1
+    js-yaml: ^3.13.1
+  checksum: c7ff53623ab8a9dd221772a5757fa0b9e5167a5ac3a71c23596634bae6efc85d8efcdebbe17f73ee5c027ea5afc48c705e8a720f02c4909f9a357d8027040b7b
+  languageName: node
+  linkType: hard
+
+"@apidevtools/json-schema-ref-parser@npm:9.0.9":
   version: 9.0.9
   resolution: "@apidevtools/json-schema-ref-parser@npm:9.0.9"
   dependencies:
@@ -27,7 +38,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@apidevtools/openapi-schemas@npm:^2.0.4":
+"@apidevtools/openapi-schemas@npm:^2.1.0":
   version: 2.1.0
   resolution: "@apidevtools/openapi-schemas@npm:2.1.0"
   checksum: 4a8f64935b9049ef21e41fa4b188f39f6bc3f5291cebd451701db1115451ccb246a739e46cc5ce9ecdec781671431db40db7851acdac84a990a45756e0f32de3
@@ -41,19 +52,20 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@apidevtools/swagger-parser@npm:10.0.3":
-  version: 10.0.3
-  resolution: "@apidevtools/swagger-parser@npm:10.0.3"
+"@apidevtools/swagger-parser@npm:^10.1.0":
+  version: 10.1.0
+  resolution: "@apidevtools/swagger-parser@npm:10.1.0"
   dependencies:
-    "@apidevtools/json-schema-ref-parser": ^9.0.6
-    "@apidevtools/openapi-schemas": ^2.0.4
+    "@apidevtools/json-schema-ref-parser": 9.0.6
+    "@apidevtools/openapi-schemas": ^2.1.0
     "@apidevtools/swagger-methods": ^3.0.2
     "@jsdevtools/ono": ^7.1.3
+    ajv: ^8.6.3
+    ajv-draft-04: ^1.0.0
     call-me-maybe: ^1.0.1
-    z-schema: ^5.0.1
   peerDependencies:
     openapi-types: ">=7"
-  checksum: 580a86d4c2a667e825dae80d2ed115c282e6210e3cb0ffc39b3bf5fc5b4fcb576cce3fc3d0519b6c4de8fa617ab0dbee1adeac134d0c1364e0a0f7d394b28796
+  checksum: c7c923755bd025ee2cae97e1cfd525538523ba74c341a0ac814c023ffe5e63fc2d997539a8ccf9a0fcec41a2d6337d40cc5735acb991ddcbb415853a241908d1
   languageName: node
   linkType: hard
 
@@ -75,14 +87,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@asteasolutions/zod-to-openapi@npm:^3.0.0":
-  version: 3.0.0
-  resolution: "@asteasolutions/zod-to-openapi@npm:3.0.0"
+"@asteasolutions/zod-to-openapi@npm:^3.1.0":
+  version: 3.1.0
+  resolution: "@asteasolutions/zod-to-openapi@npm:3.1.0"
   dependencies:
     openapi3-ts: ^3.1.1
   peerDependencies:
     zod: ^3.14.0
-  checksum: 8fec29a4b3071218a4f4096a32406dd98251fba6d2410ec9415e0bc398301afd97e88579884924fd889678cd31d2ebaad06f82c36302eb9619adee954606ba4e
+  checksum: 21598bccb6409dbed2478fa5272dfd0df81bdbb013b69833d4a915d9bd51085b13c04f51ce83548db395cd7fcd33b8926d0302bc67679f35e49d1d5986342b3b
   languageName: node
   linkType: hard
 
@@ -3773,7 +3785,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@neet/vschedule-api-spec@workspace:packages/@neet/vschedule-api-spec"
   dependencies:
-    "@asteasolutions/zod-to-openapi": ^3.0.0
+    "@asteasolutions/zod-to-openapi": ^3.1.0
     "@neet/eslint-plugin-vschedule": "workspace:^"
     "@neet/tsconfig-vschedule": "workspace:^"
     "@types/eslint": ^8.4.10
@@ -3801,7 +3813,7 @@ __metadata:
     "@neet/vschedule-api-spec": "workspace:^"
     "@neet/vschedule-seed": "workspace:^"
     "@prisma/client": ^4.6.1
-    "@quramy/jest-prisma-node": ^1.1.2
+    "@quramy/jest-prisma-node": ^1.2.0
     "@swc/core": ^1.3.19
     "@swc/jest": ^0.2.23
     "@types/bcryptjs": ^2.4.2
@@ -3829,7 +3841,7 @@ __metadata:
     class-validator: ^0.13.2
     color: ^4.2.3
     cors: ^2.8.5
-    cosmiconfig: ^7.1.0
+    cosmiconfig: ^8.0.0
     cosmiconfig-toml-loader: ^1.0.0
     dayjs: ^1.11.6
     eslint: ^8.28.0
@@ -3848,7 +3860,7 @@ __metadata:
     mkdirp: ^1.0.4
     nanoid: ^3.3.4
     node-fetch: ^2.6.7
-    openapi2aspida: ^0.19.0
+    openapi2aspida: ^0.20.0
     passport: ^0.6.0
     passport-local: ^1.0.0
     plaiceholder: ^2.5.0
@@ -3933,7 +3945,7 @@ __metadata:
     jest-date-mock: ^1.0.8
     mousetrap: ^1.6.5
     next: 12.3.3
-    openapi2aspida: ^0.19.0
+    openapi2aspida: ^0.20.0
     polished: ^4.1.3
     postcss: ^8.4.18
     prettier: ^2.7.1
@@ -4697,16 +4709,16 @@ __metadata:
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-"@quramy/jest-prisma-node@npm:^1.1.2":
-  version: 1.1.2
-  resolution: "@quramy/jest-prisma-node@npm:1.1.2"
+"@quramy/jest-prisma-node@npm:^1.2.0":
+  version: 1.2.0
+  resolution: "@quramy/jest-prisma-node@npm:1.2.0"
   dependencies:
     "@quramy/jest-prisma-core": ^1.0.0
   peerDependencies:
     "@prisma/client": ^2.29.0 || ^3.0.0 || ^4.0.0
     jest: ^28.0.0 || ^29.0.0
     jest-environment-node: ^28.0.0 || ^29.0.0
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+  checksum: beabbcff6f16be5fb90389f8d14bcec85a6cd5b2964588578cbdfcd5f34e9dbaed5fdb545bfab85381f55e03644e9d497f4579157f7b5b26b5a778e53843f30c
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@@ -8295,7 +8307,7 @@ __metadata:
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-"ajv@npm:^8.0.0, ajv@npm:^8.6.2":
+"ajv@npm:^8.0.0, ajv@npm:^8.6.2, ajv@npm:^8.6.3":
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   resolution: "ajv@npm:8.11.2"
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@@ -8734,7 +8746,7 @@ __metadata:
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-"aspida@npm:^1.7.1, aspida@npm:^1.9.0":
+"aspida@npm:^1.11.0, aspida@npm:^1.7.1":
   version: 1.11.0
   resolution: "aspida@npm:1.11.0"
   dependencies:
@@ -10717,7 +10729,7 @@ __metadata:
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-"commander@npm:^2.19.0, commander@npm:^2.20.0, commander@npm:^2.20.3":
+"commander@npm:^2.19.0, commander@npm:^2.20.0":
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   resolution: "commander@npm:2.20.3"
   checksum: ab8c07884e42c3a8dbc5dd9592c606176c7eb5c1ca5ff274bcf907039b2c41de3626f684ea75ccf4d361ba004bbaff1f577d5384c155f3871e456bdf27becf9e
@@ -11220,16 +11232,15 @@ __metadata:
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-"cosmiconfig@npm:^7.1.0":
-  version: 7.1.0
-  resolution: "cosmiconfig@npm:7.1.0"
+"cosmiconfig@npm:^8.0.0":
+  version: 8.0.0
+  resolution: "cosmiconfig@npm:8.0.0"
   dependencies:
-    "@types/parse-json": ^4.0.0
     import-fresh: ^3.2.1
+    js-yaml: ^4.1.0
     parse-json: ^5.0.0
     path-type: ^4.0.0
-    yaml: ^1.10.0
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@@ -18820,13 +18831,6 @@ __metadata:
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-"lodash.isequal@npm:^4.5.0":
-  version: 4.5.0
-  resolution: "lodash.isequal@npm:4.5.0"
-  checksum: da27515dc5230eb1140ba65ff8de3613649620e8656b19a6270afe4866b7bd461d9ba2ac8a48dcc57f7adac4ee80e1de9f965d89d4d81a0ad52bb3eec2609644
-  languageName: node
-  linkType: hard
-
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   resolution: "lodash.ismatch@npm:4.4.0"
@@ -21082,26 +21086,26 @@ __metadata:
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-"openapi-types@npm:^9.1.0":
-  version: 9.3.1
-  resolution: "openapi-types@npm:9.3.1"
-  checksum: 44b7132b159666877b1659dcfb48ea34d45222dd96a14626d57830401dfad801d2cba5dc9e88471faa4f1c2f7670d814601d91e156d6a05ecccc60c65660ebbc
+"openapi-types@npm:^12.0.2":
+  version: 12.0.2
+  resolution: "openapi-types@npm:12.0.2"
+  checksum: 097edc46adb5a8fc2a3419e2e0adbb5516737fd83b4041ec62ee28427e85d9f18c6ead9231b9d1c8f718d86eeccf3c0997437414011d8bb1597387a047493fea
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-"openapi2aspida@npm:^0.19.0":
-  version: 0.19.0
-  resolution: "openapi2aspida@npm:0.19.0"
+"openapi2aspida@npm:^0.20.0":
+  version: 0.20.0
+  resolution: "openapi2aspida@npm:0.20.0"
   dependencies:
-    aspida: ^1.9.0
-    fs-extra: ^10.0.0
+    "@apidevtools/swagger-parser": ^10.1.0
+    aspida: ^1.11.0
+    fs-extra: ^10.1.0
     js-yaml: ^4.1.0
-    openapi-types: ^9.1.0
-    swagger-parser: ^10.0.3
+    openapi-types: ^12.0.2
     swagger2openapi: ^7.0.8
   bin:
     openapi2aspida: bin/index.js
-  checksum: 31a8d927d3fb4e8dc3ec94d7899f604a58957cd56644ac78401c5f7e2fae8e7f731003e679a21dddd4e2416461f4cb6b12f4c252d1d1eccd42b5f56e6a62aa4b
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@@ -25643,15 +25647,6 @@ __metadata:
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-"swagger-parser@npm:^10.0.3":
-  version: 10.0.3
-  resolution: "swagger-parser@npm:10.0.3"
-  dependencies:
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-  checksum: bd99d94543b9bdc6bf062ea211f70d4fa004e6e8ce97ee47a388a046f3cc2839e7349970e8a0b11136b55a674e1cc7b0bbdfbe4fb40adf0c68bc70736eedb8b7
-  languageName: node
-  linkType: hard
-
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   resolution: "swagger-ui-dist@npm:4.15.2"
@@ -28210,23 +28205,6 @@ __metadata:
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-"z-schema@npm:^5.0.1":
-  version: 5.0.4
-  resolution: "z-schema@npm:5.0.4"
-  dependencies:
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-    lodash.get: ^4.4.2
-    lodash.isequal: ^4.5.0
-    validator: ^13.7.0
-  dependenciesMeta:
-    commander:
-      optional: true
-  bin:
-    z-schema: bin/z-schema
-  checksum: afa4e0039a104a53eeb6977bf754ef44e32042aecbf3b5eb18b82649763abd5c2608e47d6d6902291359b41e76130594d7f2b6132316d819c3529f17d4d3464d
-  languageName: node
-  linkType: hard
-
 "zod@npm:^3.11.6":
   version: 3.11.6
   resolution: "zod@npm:3.11.6"