| 2011 | Deputy Chief Cabinet Secretary (2nd Reshuffled Kan Cabinet) |
| 2010 | Deputy Chief Cabinet Secretary (Reshuffled Kan Cabinet) |
| 2010 | Deputy Chief Cabinet Secretary (Kan Cabinet) |
| 2009 | Senior Vice Minister of Foreign Affairs (Hatoyama Cabinet) |
| 2008 | Secretary General of the Global Warming Countermeasures Headquarters, DPJ |
| 2007 | Chair, Policy Research Committee of the House of Councillors, DPJ
Deputy Chair, Policy Research Committee, DPJ |
| 2005 | Chair of the Committee on Environment, House of Councillors
Director-General, Research Department, DPJ
Chairman of 2nd subcommittee, Constitusion Research Committee, DPJ
Director of Manifesto draft committee, DPJ |
| 2004 | Elected as a Member of the House of Councillors on Kyoto District (2nd) |
| 2003 | Put together DPJ Manifesto for general election as Director of Manifesto preparatory committee. |
| 2002 | Director-General, Local Organization Department, DPJ, Chairman of the Democratic Party Kyoto Prefecture total branch federation |
| 2001 | Visiting Professor, Kyoto University of Art and Design (Politics) |
| 1999 | Devoted to pass the Act on Special Measures against Dioxins |
| 1998 | Elected as a Member of the House of Councillors on Kyoto District (1st) |
| 1997 | Participated as a coodinator of DPJ, COP3 Kyoto |
| 1995 | Finished Masters Program, Graduate School of Law, Kyoto University |
| 1991 | Experienced Sarvodaya Movement, met Dr. Ariyaratne, nominee of Novel Peace Prize |
| 1990 | Entered The Matsushita Institute Government and Management |
| 1986 | Joined Daiwa Securities Co., Ltd. |
