diff --git a/lang/ja/assignment.php b/lang/ja/assignment.php
index 51437660e76..9ba98b42116 100644
--- a/lang/ja/assignment.php
+++ b/lang/ja/assignment.php
@@ -8,10 +8,10 @@ $string['assignmentname'] = "
 $string['assignmenttype'] = "課題タイプ";
 $string['description'] = "詳細";
 $string['duedate'] = "提出期限";
-$string['early'] = "\$a 日早い";
+$string['early'] = "\$a 早く提出";
 $string['failedupdatefeedback'] = "ユーザ \$a のフィードバック更新に失敗しました ";
 $string['feedbackupdated'] = "\$a の参加者に対するフィードバックの更新";
-$string['late'] = "\$a 日遅い";
+$string['late'] = "\$a 遅く提出";
 $string['maximumgrade'] = "最大評価";
 $string['maximumsize'] = "最大サイズ";
 $string['modulename'] = "課題";