| 2008 Sep. | Minister of Economy, Trade and Industry (Aso Cabinet) |
| 2008 Aug. | Minister of Economy, Trade and Industry (Fukuda Reshuffled Cabinet) |
| 2007 Aug. | Chairman, General Council, Liberal Democratic Party (LDP) |
| 2006 Sep. | Chairman, Diet Affairs Committee, LDP |
| 2005 Oct. | Minister of Economy, Trade and Industry (third Koizumi Reshuffled Cabinet) |
| 2005 May | Chairman, Special Committee on Postal Privatization, House of Representatives (HR) |
| 2004 Sep. | Director-General, Election Bureau, LDP |
| 2002 Dec. | Secretary-General and Representative, New Conservative Party |
| 2001 Sep. | Secretary-General and Diet Affairs Committee Chairman, Conservative Party |
| 2000 Jul. | Acting Secretary-General and Diet Affairs Committee Chairman, Conservative Party |
| 2000 Apr. | Minister of Transport and Director-General of Hokkaido Development Agency (Mori Cabinet) |
| 1999 Oct. | Minister of Transport and Director-General of Hokkaido Development Agency (second Obuchi Cabinet) |
| 1998 Jan. | Chairman, Diet Affairs Committee, Liberal Party |
| 1997 Sep. | Chairman, Standing Committee on Construction, HR |
| 1995 Sep. | Director, Election Strategy Division, New Frontier Party |
| 1993 Aug. | The 50th State Secretary of Transportation (Hosokawa Cabinet) |
| 1990 Feb. | The 46th State Secretary of Transportation (second Kaifu Cabinet) |
| 1983 Dec. | Elected as a Member of HR (has been elected consecutively eight times since then) |
| 1975 Apr. | Elected as a Member of Wakayama Prefectual Assembly (served two terms) |
| 1961 Apr. | Secretary to the late Saburo Endo (former HR member and former Minister of Construction) |
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