diff --git a/language/np3_ja_jp/strings_ja_jp.rc b/language/np3_ja_jp/strings_ja_jp.rc
index dc3c9f57b..579b1a569 100644
--- a/language/np3_ja_jp/strings_ja_jp.rc
+++ b/language/np3_ja_jp/strings_ja_jp.rc
@@ -251,7 +251,7 @@ END
 STRINGTABLE
 BEGIN
     IDS_MUI_MENU_LANGUAGE   "言語(&L)"
-    IDS_USE_LOCALE_DATEFMT  "Language defines &Date Format"
+    IDS_USE_LOCALE_DATEFMT  "言語を日付の書式に反映(&D)"
     IDS_MUI_MENU_THEMES     "配色テーマ(&S)"
     IDM_THEMES_DEFAULT      "初期設定(&F)"
     IDM_THEMES_FILE_ITEM    "標準 (&S)"  // Keep blank space before (&S)