diff --git a/po/ja.po b/po/ja.po
index 2b5a834da2..5be9db8db0 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -8966,7 +8966,7 @@ msgstr "インデックスの削除"
 
 #: server_synchronize.php:433 server_synchronize.php:876
 msgid "Apply index(s)"
-msgstr ""
+msgstr "インデックスを適用する"
 
 #: server_synchronize.php:434 server_synchronize.php:877
 msgid "Update row(s)"