diff --git a/lang/ja.json b/lang/ja.json
index c67ce6bc..778072c0 100644
--- a/lang/ja.json
+++ b/lang/ja.json
@@ -209,10 +209,14 @@
   "CoC7.FlatDiceModifier": "ダイス修正値",
   "CoC7.FlatModifier": "技能修正値",
   "CoC7.RollDifficultyUnknown": "見えない",
-  "CoC7.RollDifficultyRegular": "レギュラーの難易度",
-  "CoC7.RollDifficultyHard": "ハードの難易度",
-  "CoC7.RollDifficultyExtreme": "イクストリームの難易度",
-  "CoC7.RollDifficultyCritical": "クリティカルの難易度",
+  "CoC7.RollDifficultyRegular": "レギュラー",
+  "CoC7.RollDifficultyRegularTitle": "レギュラーの難易度",
+  "CoC7.RollDifficultyHard": "ハード",
+  "CoC7.RollDifficultyHardTitle": "ハードの難易度",
+  "CoC7.RollDifficultyExtreme": "イクストリーム",
+  "CoC7.RollDifficultyExtremeTitle": "イクストリームの難易度",
+  "CoC7.RollDifficultyCritical": "クリティカル",
+  "CoC7.RollDifficultyCriticalTitle": "クリティカルの難易度",
   "CoC7.RollResult.LuckSpendText": "{luckAmount} の幸運を消費して {successLevel} 成功した",
   "CoC7.RollDice": "ロール !",
   "CoC7.CreateLink": "リンク作成",