| September 2006 | Minister of Finance in the Abe Cabinet |
| November 2005 | Chairman of the LDP Research Commission on Oil, Resources and Energy |
| October 2004 | Deputy Chairman of the LDP General Council |
| October 2002 | Chairman of the LDP Research Commission to Promote Research and Establish a Nation of Innovative Science and Technology |
| April 2001 | Minister of State for Okinawa and Northern Territories Affairs and Minister of State for Science and Technology Policy in the First Koizumi Cabinet (until Sept. 2002) |
| June 2000 | LDP Acting Secretary-General (until Apr. 2001) |
| October 1999 | Acting Chairman of the LDP Party Organization Headquarters and Director of the Interest Group Policy Division (until June 2000) |
| September 1998 | Deputy Chairman of the LDP Research Commission on the Tax System |
| August 1998 | Director-General of the LDP Election Bureau (until Oct. 1999) |
| August 1998 | Acting Chairman of the LDP Research Commission to Promote Research and Establish a Nation of Innovative Science and Technology and to Promote Research and Development on Information and Telecommunications |
| September 1997 | Minister of State for Economic Planning in the Second Hashimoto Cabinet (until July 1998) |
| November 1996 | Deputy Chairman of the LDP Policy Research Council (until Sept. 1997) |
| April 1996 | Director of the House of Representatives Special Committee on Financial Issues and Related Matters (until Oct. 1996) |
| January 1995 | Chairman of the House of Representatives Committee on Finance (until Sept. 1995) |
| July 1994 | LDP Deputy Secretary-General (until Jan. 1995) |
| August 1993 | Director of the LDP Science and Technology Policy Division (until July 1994) |
| December 1992 | Director of the LDP Commerce and Industry Division (until Aug. 1993) |
| November 1991 | Director-General of the Research Bureau of the Liberal Democratic Party (LDP) (until Dec. 1992) |
| February 1990 | Parliamentary Vice-Minister for Finance (until Dec. 1990) |
| December 1983 | Elected to the House of Representatives |
| 1982 | Retired from MITI |
| 1981 | Director-General of the Guidance Department of MITI's Small and Medium Enterprise Agency (until 1982) |
| 1979 | Director of the General Affairs Division of the Director-General's Secretariat of the Science and Technology Agency (until 1981) |
| 1970 | Consul at the Consulate General of Japan in New York (until 1974) |
| 1956 | Joined the Ministry of International Trade and Industry (MITI) |
