| 1956 | Entered the Ministry of International Trade and Industry (MITI) |
| 1970 | Consul at the Japanese Consulate General in New York |
| 1974 | Director, South Asia & Eastern Europe Division, Trade Policy Bureau, MITI |
| 1978 | Director, Small Enterprise Policy Division, Small & Medium Enterprise Agency (SMEA) |
| 1979 | Director, Administrative Division, Science and Technology Agency
|
| 1981 | Director-General, Guidance Department, SMEA |
| 1983 | Elected to the House of Representatives (HR)(returned 6 times) |
| 1990 | Parliamentary Vice-Minister for Finance |
| 1991 | Director-General, Research & Investigation Bureau, Liberal Democratic Party (LDP) |
| 1992 | Director-General, Commerce & Industry Policy Bureau, LDP |
| 1993 | Director-General, Science & Technology Policy Bureau, LDP |
| 1995 | Chairman, Standing Committee on Finance, HR |
| 1996 | Secretary-General, Research Council for the Promotion of Science and Technology-oriented nation, LDP
Director, Special Committee on Taxation System Problems and relatives matters
Member, Standing Committee on Budget
Deputy Chairman, Policy Research Council, LDP |
| 1997 | Minister of State for Economic Planning |
| 1998 | Director-General, Election Bureau, LDP |
| 1999 | Director-General, Interest Group Coordination Bureau, LDP
Acting Chairman, Party Organization Headquarters, LDP |
| 2000 | Acting Secretary-General, LDP |
| 2001 | Minister of State for Okinawa and Northern Territories Affairs
Minister of State for Science and Technology Policy |
