diff --git a/po/ja.po b/po/ja.po
index b25f331ad..0a95e0303 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -6138,7 +6138,7 @@ msgstr "内部リレーション"
 
 #: libraries/schema/User_Schema.class.php:116
 msgid "FOREIGN KEY"
-msgstr ""
+msgstr "外部キー"
 
 #: libraries/schema/User_Schema.class.php:148
 msgid "Please choose a page to edit"