Last Updated 2021.4
| Dates | Contents |
| 2021.4 | Keeping updates |
| 2019.6 | Totally updating |
| 2010.10.1 | Extensive updating |
| 2009.5.1 | Transfer to NIMS server |
| 2008.8 | Finally the large change complete & up |
| 2007.6 | Lagrge change of the whole pages. (xhtml 1.0+css) |
| 2004.6.16 | 4th aniverssary. |
| 2004.1.17 | Extensive change of private pages. Ver. 4 |
| 2003.7.24 | Transfer to Tohoku Univ server |
| 2002.11.25 | Private pages ver. 3 (on another server) |
| 2002.6.16 | Keep on updating, 2nd aniverssary |
| 2001.6.16 | Private pages ver.2 (on another server) |
| 2001.5.2 | Version 2 up: Extensive chahge, focusing on research |
| 2000.6 - 2001.4 | Keep updating |
| 2000.6.16 | Version 1 up on Kyoto Univ server |