diff --git a/lang/ja/forum.php b/lang/ja/forum.php
index 005e63c196e..7e460d3fda4 100644
--- a/lang/ja/forum.php
+++ b/lang/ja/forum.php
@@ -21,7 +21,7 @@ $string['deletesure'] = "
 $string['discussion'] = "ディスカッション";
 $string['discussions'] = "ディスカッション";
 $string['discussionsstartedby'] = "\$a さんより開始されたディスカッション";
-$string['discussthistopic'] = "投稿";
+$string['discussthistopic'] = "投稿内容";
 $string['eachuserforum'] = "ディスカッションを1件投稿";
 $string['edit'] = "編集";
 $string['editing'] = "編集";