diff --git a/po/ja.po b/po/ja.po
index 9a62d0a9f..c49e981f0 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -4,7 +4,7 @@ msgstr ""
 "Project-Id-Version: phpMyAdmin 3.4.0-rc1-dev\n"
 "Report-Msgid-Bugs-To: phpmyadmin-devel@lists.sourceforge.net\n"
 "POT-Creation-Date: 2011-04-15 08:56+0200\n"
-"PO-Revision-Date: 2011-04-20 03:27+0200\n"
+"PO-Revision-Date: 2011-04-20 03:32+0200\n"
 "Last-Translator: Yuichiro <yuichiro@pop07.odn.ne.jp>\n"
 "Language-Team: japanese <jp@li.org>\n"
 "Language: ja\n"
@@ -1907,7 +1907,7 @@ msgstr "グラフには GD 拡張が必要です。"
 
 #: libraries/chart.lib.php:252
 msgid "JSON encoder is needed for chart tooltips."
-msgstr ""
+msgstr "グラフのツールチップには JSON エンコーダが必要です。"
 
 #: libraries/common.inc.php:576
 msgid ""