diff --git a/src/config/locales/ja/translation.json b/src/config/locales/ja/translation.json
index 8a0740a3..7a10d7b5 100644
--- a/src/config/locales/ja/translation.json
+++ b/src/config/locales/ja/translation.json
@@ -115,7 +115,8 @@
       "use_marker": {
         "title": "前回読んだ位置からタイムラインを読み込む",
         "home": "ホーム",
-        "notifications": "通知"
+        "notifications": "通知",
+        "mentions": "Mentions"
       }
     },
     "filters": {