diff --git a/lang/ja/lang.php b/lang/ja/lang.php
index eeff5aa..2c2563d 100644
--- a/lang/ja/lang.php
+++ b/lang/ja/lang.php
@@ -2,8 +2,9 @@
 
 /**
  * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
- * 
+ *
  * @author Hideaki SAWADA <chuno@live.jp>
  */
 $lang['title']                 = 'ドキュメントの結果';
 $lang['confmanager title']     = 'DocSearch';
+$lang['usage']                 = '使用方法';
diff --git a/lang/ja/settings.php b/lang/ja/settings.php
index 7f2c528..b37c6ef 100644
--- a/lang/ja/settings.php
+++ b/lang/ja/settings.php
@@ -2,7 +2,7 @@
 
 /**
  * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
- * 
+ *
  * @author Hideaki SAWADA <chuno@live.jp>
  */
 $lang['showSnippets']          = '結果の最初の # にスニペットを表示する。';