diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 55847cca4..f72da1f90 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1568,3 +1568,6 @@ _deck:
     list: "リスト"
     mentions: "あなた宛て"
     direct: "ダイレクト"
+
+_apiDoc:
+  accessTokenRequired: "アクセストークンが必要です"