| Sep. 2008 | Minister of Defense |
| Sep. 2007 | Chairman, Research Commission on Fishery Policies of the Liberal Democratic Party (LDP)
|
| Oct. 2006 | Deputy Chairman, Research Commission on Security, LDP |
| Sep. 2006 | Chairman, Special Committee on Prevention of International Terrorism and Japan's Cooperation and Support, Humanitarian Assistance for Reconstruction in Iraq, the House of Representatives (HR)
|
| Sep. 2005 | Chairman, Standing Committee on Security, HR |
| Sep. 2004 | Deputy Chairman, Diet Affairs Committee, LDP |
| Sep. 2003 | Senior Vice Minister for Defense |
| Oct. 2002 | Director, National Defense Division, LDP |
| May 2001 | Deputy Chairman, Policy Research Council, LDP |
| Dec. 2000 | Deputy Secretary-General, LDP |
| Jun. 2000 | Senior Director, Standing Committee on Security, HR |
| Jul. 1998 | Parliamentary Vice Minister for Defense |
| Jul. 1993 | Elected as a Member of House of Representatives |
