diff --git a/en_US.ISO8859-1/articles/contributors/contrib.additional.sgml b/en_US.ISO8859-1/articles/contributors/contrib.additional.sgml
index b75cee1867..6205d87f6d 100644
--- a/en_US.ISO8859-1/articles/contributors/contrib.additional.sgml
+++ b/en_US.ISO8859-1/articles/contributors/contrib.additional.sgml
@@ -6390,6 +6390,11 @@
 	<email>j1594016@ed.kagu.sut.ac.jp</email></para>
     </listitem>
 
+    <listitem>
+      <para>TAKATSU Tomonari
+	<email>tota@rtfm.jp</email></para>
+    </listitem>
+
     <listitem>
       <para>Takayuki Ariga
 	<email>a00821@cc.hc.keio.ac.jp</email></para>