| Sep. 2009 | Deputy Chief Cabinet Secretary (The Hatoyama Cabinet) |
| Aug. 2009 | Elected to the House of Representatives (45th General Election) |
| Sep. 2007 | Director of Comittee on Financial Affairs |
| Jan. 2007 | Senior Director of Comittee on Rules and Administration |
| Sep. 2006 | Director of Comittee on Rules and Administration |
| Sep. 2005 | Elected to the House of Representatives (44th General Election)
Director of Comittee on Budget
Senior Vice Secretary General (DPJ) |
| Jan. 2004 | Director of Comittee on Internal Affairs and Communication |
| Nov. 2003 | Elected to the House of Representatives (43th General Election) |
| Sep. 2000 | Vice Chairman of Diet Affairs Comittee (DPJ) |
| Jul. 2000 | Member of Comittee on Commerce and Industry |
| Jun. 2000 | Elected to the House of Representatives (42th General Election) |
| Aug. 1995 | Secretary to Mr. Morihiro Hosokawa, Member of the House of Representatives |