diff --git a/torchdistill/common/func_util.py b/torchdistill/common/func_util.py
index fe7ddc0d..651a4fdb 100644
--- a/torchdistill/common/func_util.py
+++ b/torchdistill/common/func_util.py
@@ -1,4 +1,4 @@
-import torch.nn as nn
+from torch import nn
 
 from torchdistill.common import misc_util
 
@@ -7,6 +7,16 @@
 SCHEDULER_DICT = misc_util.get_classes_as_dict('torch.optim.lr_scheduler')
 
 
+def register_optimizer(cls_or_func):
+    OPTIM_DICT[cls_or_func.__name__] = cls_or_func
+    return cls_or_func
+
+
+def register_scheduler(cls_or_func):
+    SCHEDULER_DICT[cls_or_func.__name__] = cls_or_func
+    return cls_or_func
+
+
 def get_loss(loss_type, param_dict=dict(), **kwargs):
     lower_loss_type = loss_type.lower()
     if lower_loss_type in LOSS_DICT:
diff --git a/torchdistill/datasets/registry.py b/torchdistill/datasets/registry.py
new file mode 100644
index 00000000..b72baa81
--- /dev/null
+++ b/torchdistill/datasets/registry.py
@@ -0,0 +1,9 @@
+import torchvision
+
+DATASET_DICT = dict()
+DATASET_DICT.update(torchvision.datasets.__dict__)
+
+
+def register_dataset(cls_or_func):
+    DATASET_DICT[cls_or_func.__name__] = cls_or_func
+    return cls_or_func
diff --git a/torchdistill/datasets/util.py b/torchdistill/datasets/util.py
index 32bcf445..572ce7e3 100644
--- a/torchdistill/datasets/util.py
+++ b/torchdistill/datasets/util.py
@@ -9,6 +9,7 @@
 from torchdistill.common.constant import def_logger
 from torchdistill.datasets.coco import ImageToTensor, Compose, CocoRandomHorizontalFlip, get_coco
 from torchdistill.datasets.collator import get_collate_func
+from torchdistill.datasets.registry import DATASET_DICT
 from torchdistill.datasets.sample_loader import get_sample_loader
 from torchdistill.datasets.sampler import get_batch_sampler
 from torchdistill.datasets.transform import TRANSFORM_CLASS_DICT, CustomCompose
@@ -16,7 +17,6 @@
 
 logger = def_logger.getChild(__name__)
 
-DATASET_DICT = torchvision.datasets.__dict__
 TRANSFORM_CLASS_DICT.update(torchvision.transforms.__dict__)
 
 
@@ -56,10 +56,10 @@ def build_transform(transform_params_config, compose_cls=None):
     return torchvision.transforms.Compose(component_list) if compose_cls is None else compose_cls(component_list)
 
 
-def get_official_dataset(dataset_cls, dataset_params_config):
+def get_torchvision_dataset(dataset_cls, dataset_params_config):
     params_config = dataset_params_config.copy()
     transform = build_transform(params_config.pop('transform_params', None))
-    target_transform = build_transform(params_config.pop('transform_params', None))
+    target_transform = build_transform(params_config.pop('target_transform_params', None))
     if 'loader' in params_config:
         loader_config = params_config.pop('loader')
         loader_type = loader_config['type']
@@ -118,13 +118,15 @@ def get_dataset_dict(dataset_config):
                                   split_config['annotated_only'], split_config.get('random_horizontal_flip', None),
                                   is_segment, transforms, split_config.get('jpeg_quality', None))
     elif dataset_type in DATASET_DICT:
-        dataset_cls = DATASET_DICT[dataset_type]
+        dataset_cls_or_func = DATASET_DICT[dataset_type]
+        is_torchvision = dataset_type in torchvision.datasets.__dict__
         dataset_splits_config = dataset_config['splits']
         for split_name in dataset_splits_config.keys():
             st = time.time()
             logger.info('Loading {} data'.format(split_name))
             split_config = dataset_splits_config[split_name]
-            org_dataset = get_official_dataset(dataset_cls, split_config['params'])
+            org_dataset = get_torchvision_dataset(dataset_cls_or_func, split_config['params']) if is_torchvision \
+                else dataset_cls_or_func(**split_config['params'])
             dataset_id = split_config['dataset_id']
             random_split_config = split_config.get('random_split', None)
             if random_split_config is None: