| April 1980 | Enter Tokyo University, General Arts of Sci., Sci-Ｉ Course |
| March 1984 | Graduate in Fund. Sci. at Tokyo University |
| April 1984- March 1986 | Master degree at Tokyo University(Sokan-Rikagaku) |
| April 1986-September 1993 | Reseach Assistant at Gakushuin University |
| September 1993 | Ph. D at Tokyo University, 1993 |
| October 1993 | Associate Professor at Tokyo Metropolitan University |
| April 2002- | Professor at Tokyo Metropolitan University |