diff --git a/frontend/lang/messages/ja-JP.json b/frontend/lang/messages/ja-JP.json
index b5221ccc10e..3850dded051 100644
--- a/frontend/lang/messages/ja-JP.json
+++ b/frontend/lang/messages/ja-JP.json
@@ -89,7 +89,7 @@
     "confirm-delete-generic": "削除しますか？",
     "copied_message": "コピーしました",
     "create": "作成",
-    "created": "作成しました。",
+    "created": "作成日",
     "custom": "カスタム",
     "dashboard": "ダッシュボード",
     "delete": "削除",
@@ -164,7 +164,7 @@
     "tuesday": "火曜日",
     "type": "タイプ",
     "update": "更新",
-    "updated": "更新しました",
+    "updated": "更新日時",
     "upload": "アップロード",
     "url": "URL",
     "view": "表示",