diff --git a/public/locales/ja/app.json b/public/locales/ja/app.json
index fc97e0ca..38bdedb2 100644
--- a/public/locales/ja/app.json
+++ b/public/locales/ja/app.json
@@ -40,5 +40,7 @@
   "Full screen": "全画面表示",
   "Exit full screen": "全画面表示を終了",
   "Include debug logs": "デバッグログを含む",
-  "Home": "ホーム"
+  "Home": "ホーム",
+  "Incompatible versions!": "互換性のないバージョンです!",
+  "Incompatible versions": "互換性のないバージョン"
 }