1981

BA in Faculty of Political Science and Economics, Waseda University

2012

Minister of the Environment Minister for the Restoration from and Prevention of Nuclear Accident Minister of State for Nuclear Emergency Preparedness (3rd Reshuffled Noda Cabinet)

2011

Deputy Chief Cabinet Secretary (Noda Cabinet)

2010

Senior Vice Minister of Health, Labour and Welfare (Kan Cabinet)

2009

Senior Vice Minister of Health, Labour and Welfare (Hatoyama Cabinet)

2007

Elected as a member of the House of Councilors (CR) (1st term)
The Minister of Land, Infrastructure, Transport and Tourism in the DPJ Next Cabinet (shadow cabinet) (DPJ)

2005

Re-elected (4th term)
Chiba Prefectural President of the DPJ
The Minister of the Environment in the DPJ Next Cabinet (shadow cabinet) (DPJ)

2003

Re-elected (3rd term)

2000

Re-elected (2nd term)

1993

Elected as a member of the House of Representatives (HR) (1st term)

1992

Participated in founding Ex-Prime Minister Morihiro Hosokawa's Japan New Party

1991

The Matsushita Institute of Government and Management (Director General of the Tokyo Office)

1986

Graduated from The Matsushita Institute of Government and Management (2nd-batch graduate)

Martial arts (Second dans in kendo, First dan in judo),
Play instruments (Piano, Trombone), Chorus