| 1964 | born in Shizuoka, Japan. |
| 1988 | received the Master of Engineering degree in computer science from Osaka University, Osaka, Japan. |
| 1990 - 1992 | Assistant Professor in Education Center for Information Processing, Osaka University, Osaka, Japan. |
| 1991 | received the Doctor of Engineering degree in computer science from Osaka Unviersity, Osaka Japan. |
| 1992 - 1993 | Associate Professor in Information Technology Center, Nara Institute of Science and Technology, Nara, Japan. |
| 1993 - 2000 | Associate Professor in Graduate School of Information Science, Nara Institute of Science and Technology, Nara, Japan. |
| 2000 - | Professor in Graduate School of Information Science, Nara Institute of Science and Technology, Nara, Japan. |