diff --git a/po/ja.po b/po/ja.po
index 2826077569..f143753db0 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -10,7 +10,7 @@ msgstr ""
 "Project-Id-Version: gitk\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2015-05-17 14:32+1000\n"
-"PO-Revision-Date: 2009-11-06 01:45+0900\n"
+"PO-Revision-Date: 2015-11-12 13:00+0900\n"
 "Last-Translator: YOKOTA Hiroshi <yokota@netlab.cs.tsukuba.ac.jp>\n"
 "Language-Team: Japanese\n"
 "Language: ja\n"