| 1975 | B.A.(Law),University of Tokyo |
| Official of Ministry of Home Affairs | |
| 1980 | Director of Municipal Division of Wakayama Prefecture |
| 1983 | Deputy Director of Local City Development Division of National Land Agency |
| 1984 | Deputy Director of Political Fund Regulation Division of Ministry of Home Affairs |
| 1988 | Associate Professor of Graduate School of Policy Science of Saitama University (GSPS) |
| 1997 | Associate Professor of National Graduate Institute for Policy Studies (GRIPS) |
| 2000 | Professor of National Graduate Institute for Policy Studies (GRIPS) |
| 2011 | Advisor to the President, National Graduate Institute for Policy Studies (GRIPS) |