diff --git a/po/ja.po b/po/ja.po
index fa888d83c..c8d93c332 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -9,7 +9,7 @@ msgstr ""
 "Project-Id-Version: ja\n"
 "Report-Msgid-Bugs-To: Hiroki Taniura <boiled.sugar@gmail.com>\n"
 "POT-Creation-Date: 2009-02-27 00:38+0900\n"
-"PO-Revision-Date: 2010-10-31 20:31+0900\n"
+"PO-Revision-Date: 2010-10-31 20:43+0900\n"
 "Last-Translator: Hiroki Taniura <boiled.sugar@gmail.com>\n"
 "Language-Team: Japanese <boiled.sugar@gmail.com>\n"
 "MIME-Version: 1.0\n"
@@ -2719,7 +2719,7 @@ msgstr "Dirac"
 
 #: src/mmg/options/mmg.cpp:100
 msgid "Disable header removal compression for audio and video tracks by default"
-msgstr ""
+msgstr "オーディオとビデオのトラックのHeader removal compressionをデフォルトで無効にする"
 
 #: src/mmg/jobs.cpp:479
 msgid "Disable the selected job(s) and sets their status to 'done'"