diff --git a/src/i18n/strings/ja.json b/src/i18n/strings/ja.json
index 73b1a915ec..295d42d5fe 100644
--- a/src/i18n/strings/ja.json
+++ b/src/i18n/strings/ja.json
@@ -57,5 +57,7 @@
     "No Webcams detected": "カメラが見つかりません",
     "Microphone": "マイク",
     "Camera": "カメラ",
-    "Are you sure?": "本当によろしいですか？"
+    "Are you sure?": "本当によろしいですか？",
+    "OK": "OK",
+    "Operation failed": "操作に失敗しました"
 }