diff --git a/po/ja.po b/po/ja.po
index b9ec81847..c36440eea 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -5,7 +5,7 @@ msgstr ""
 "PO-Revision-Date: \n"
 "Last-Translator: \n"
 "Language-Team: dabura667\n"
-"Language: ja\n"
+"Language: ja_JP\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"