| July 2, 2014 | members was updated. |
| November 23, 2013 | members was updated. |
| April 25, 2011 | members was updated. |
| October 2, 2008 | members was updated. |
| September 6, 2005 | Development of a new technique for iris verification achieving the world's highest level of performance, Tohoku University News. |
| May 1, 2003 | Web Page was renewed. |
| November 27, 2001 | Web Page was renewed. |
| November 8, 2001 | Web Page was updated. |
| July 28, 1998 | Local services for lab. members (Japanese page) was updated. |
| July 21, 1998 | Lab. events 1998 (Japanese page) was updated. |
| July 4, 1998 | Our WWW sever has been renewed. |