| April 1979 | Entered the Bank of Mitsui |
| July 1986 | First Elected Member of the House of Representatives (5 terms in total, up to the present) |
| December 1992 | Parliamentary Vice Minister for Agriculture, Forestry and Fisheries |
| January 1996 | Chairman, Special Committee on Deregulation, HR |
| August 1998 | Chairman, Committee on Transport, HR |
| July 2000 | Senior State Secretary for the Minister for Agriculture, Forestry and Fisheries |
December 2000
-January 2001 | Senior State Secretary for Defense |
January 2001
- April 2001 | Senior Vice Minister for Defense |
| September 2002 | Minister of State for Defense |
