diff --git a/src/locale/lang/ja-JP.js b/src/locale/lang/ja-JP.js
index 8bb7719..7e536b0 100644
--- a/src/locale/lang/ja-JP.js
+++ b/src/locale/lang/ja-JP.js
@@ -20,7 +20,7 @@ export default {
             endTime: '終了時間',
             clear: 'クリーア',
             ok: '確定',
-            datePanelLabel: '[yyyy] [mmmm]',
+            datePanelLabel: '[yyyy年] [m月]',
             month: '月',
             month1: '1 月',
             month2: '2 月',
--
libgit2 0.21.4