| 2005 | Minister for Internal Affairs and Communications |
| 2004 | Minister for Internal Affairs and Communications |
| 2003 | Minister for Public Management, Home Affairs, Posts and Telecommunications |
| 2001 | Chairman, Policy Research Council, LDP |
| 2001 | Minister of State (Economic and Fiscal Policy, IT Policy) |
| 1999 | Deputy Chairman, Policy Research Council, LDP |
| 1999 | Deputy Secretary-General, LDP |
| 1998 | Chairman, Special Committee on Fiscal Structure Reform, HR |
| 1996 | Minister of State; Economic Planning Agency |
| 1992 | Director, Foreign Affairs Division, LDP |
| 1991 | Chairman, Standing Committee on Foreign Affairs, HR |
| 1991 | Chairman, Special Committee on Coal Issues, the House of Representatives (HR) |
| 1990 | Director, Education Division, Liberal Democratic Party (LDP) |
| 1988 | Vice Minister for Education, Sports, Science and Culture |
| 1979 | Elected Member of the House of Representatives for the first time. |
| 1978 | Chairman, Japan Junior Chamber |
| 1973 | President, Aso Industry (currently Aso Cement Co., Ltd.) |
