diff --git a/hydro/package.xml b/hydro/package.xml
index 493a4b3..598ffee 100644
--- a/hydro/package.xml
+++ b/hydro/package.xml
@@ -7,7 +7,6 @@
   </description>
 
   <maintainer email="k-okada@jsk.t.u-tokyo.ac.jp">Kei Okada</maintainer>
-  <maintainer email="iisaito@kinugarage.com">Isaac Isao Saito</maintainer>
   <author email="git@killbots.net">Geoffrey Biggs</author>
 
   <license>EPL</license>
diff --git a/indigo/package.xml b/indigo/package.xml
index 8dd8847..8b52b07 100644
--- a/indigo/package.xml
+++ b/indigo/package.xml
@@ -7,7 +7,6 @@
   </description>
 
   <maintainer email="k-okada@jsk.t.u-tokyo.ac.jp">Kei Okada</maintainer>
-  <maintainer email="iisaito@kinugarage.com">Isaac Isao Saito</maintainer>
   <author email="git@killbots.net">Geoffrey Biggs</author>
 
   <license>EPL</license>