diff --git a/public/locales/ja/app.json b/public/locales/ja/app.json
index 6c98ee4..ce28a11 100644
--- a/public/locales/ja/app.json
+++ b/public/locales/ja/app.json
@@ -26,7 +26,7 @@
   "Copied!": "コピーしました！",
   "Copy and share this call link": "通話リンクをコピーし共有",
   "Copy": "コピー",
-  "Description (optional)": "概要 (任意)",
+  "Description (optional)": "概要（任意）",
   "Debug log": "デバッグログ",
   "Create account": "アカウントを作成",
   "Having trouble? Help us fix it.": "トラブルが起きましたか? 修正にご協力ください。",
@@ -36,5 +36,7 @@
   "Download debug logs": "デバッグログをダウンロード",
   "Display name": "表示名",
   "Developer": "開発者",
-  "Details": "詳細"
+  "Details": "詳細",
+  "Full screen": "全画面表示",
+  "Exit full screen": "全画面表示を終了"
 }