diff --git a/ja_JP.eucJP/books/handbook/introduction/chapter.xml b/ja_JP.eucJP/books/handbook/introduction/chapter.xml
index 955c8214f3..042b83d5e8 100644
--- a/ja_JP.eucJP/books/handbook/introduction/chapter.xml
+++ b/ja_JP.eucJP/books/handbook/introduction/chapter.xml
@@ -3,7 +3,7 @@
      The FreeBSD Documentation Project
      The FreeBSD Japanese Documentation Project
 
-     Original revision: r51826
+     Original revision: r51863
      $FreeBSD$
 -->
 
@@ -143,24 +143,7 @@
 	      <primary>�Х��ʥ�ߴ���</primary>
 	      <secondary>Linux</secondary>
 	    </indexterm>
-	    <indexterm>
-	      <primary>�Х��ʥ�ߴ���</primary>
-	      <secondary>SCO</secondary>
-	    </indexterm>
-	    <indexterm>
-	      <primary>�Х��ʥ�ߴ���</primary>
-	      <secondary>SVR4</secondary>
-	    </indexterm>
-	    <indexterm>
-	      <primary>�Х��ʥ�ߴ���</primary>
-	      <secondary>BSD/OS</secondary>
-	    </indexterm>
-	    <indexterm>
-	      <primary>�Х��ʥ�ߴ���</primary>
-	      <secondary>NetBSD</secondary>
-	    </indexterm>
-	    Linux �� SCO, SVR4, BSDI, NetBSD
-	    �Ѥ˺��줿¿���Υץ������Ȥ�
+	    Linux �Ѥ˺��줿¿���Υץ������Ȥ�
 	    <emphasis>�Х��ʥ�ߴ���</emphasis>��</para>
 	</listitem>