diff --git a/packages/excalidraw/locales/ja-JP.json b/packages/excalidraw/locales/ja-JP.json
index 0886aa20d4..af2bc84b60 100644
--- a/packages/excalidraw/locales/ja-JP.json
+++ b/packages/excalidraw/locales/ja-JP.json
@@ -110,6 +110,7 @@
     "showStroke": "ストロークカラーピッカーを表示",
     "showBackground": "背景色ピッカーを表示",
     "toggleTheme": "",
+    "theme": "",
     "personalLib": "個人ライブラリ",
     "excalidrawLib": "Excalidrawライブラリ",
     "decreaseFontSize": "フォントサイズを縮小",
@@ -180,6 +181,7 @@
     "fullScreen": "フルスクリーン",
     "darkMode": "ダークモード",
     "lightMode": "ライトモード",
+    "systemMode": "",
     "zenMode": "集中モード",
     "objectsSnapMode": "オブジェクトにスナップ",
     "exitZenMode": "集中モードをやめる",