Skip to content
水岡 俊一
DietHighCurrently serving

水岡 俊一

みずおか しゅんいち

MIZUOKA Shunichi

代表Leader

立憲民主参議院· House of Councillors比例· Proportional Representation立憲民主・無所属· The Constitutional Democratic Party of Japan and the Independent4 terms

Born 1956-06-13 · 1956年6月13日、兵庫県豊岡市 (June 13, 1956, in Toyooka City, Hyogo Prefecture)

Policy issues

Current positions

Party Positions

  • 代表
    Leader

Career & history

Government Posts

  1. Sep 2, 2011内閣総理大臣補佐官(野田内閣)に就任[1][2][3][4][5]
    Appointed as Special Advisor to the Prime Minister (Noda Cabinet)

Party Posts

  1. Jan 23, 2026立憲民主党代表に就任[1]
    Appointed as President of the Constitutional Democratic Party of Japan
  2. Sep 15, 2020立憲民主党参議院議員会長に就任[1][2][3][4][5]
    Appointed as Chairman of the House of Councillors members of the Constitutional Democratic Party of Japan
  3. Jan 2015民主党総務委員長に就任[1]
    Appointed as Chairperson of the General Affairs Committee of the Democratic Party of Japan

Committee Chairs

  1. Oct 15, 2013参議院内閣委員長に就任[1][2][3][4][5]
    Appointed as Chairman of the Cabinet Committee of the House of Councillors

Professional Career

  1. 2016日本教職員組合教育政策室長に就任[1][2][3][4]
    Appointed as Director of the Education Policy Office of the Japan Teachers' Union
  2. ~ Apr 2004兵庫教育文化研究所副所長に就任[1][2][3][4]
    Appointed as Vice Director of the Hyogo Institute for Education and Culture
  3. Apr 2002兵庫県教職員組合書記次長に就任[1][2][3][4][5]
    Appointed as Deputy Secretary-General of the Hyogo Prefectural Teachers' Union
  4. Apr 2000兵庫教育文化研究所事務局長に就任[1][2][3][4][5]
    Appointed as Executive Director of the Hyogo Institute for Education and Culture
  5. Apr 1995兵庫県学校厚生会次長に就任[1][2][3][4][5]
    Appointed as Deputy Director of the Hyogo Prefecture School Welfare Association
  6. 1992兵庫県教職員組合本部執行委員に就任[1]
    Appointed as a member of the Executive Committee of the Hyogo Prefectural Teachers' Union
  7. 1990兵庫県教職員組合の専従役員に就任[1][2][3][4]
    Appointed as a full-time officer of the Hyogo Prefectural Teachers' Union
  8. Apr 1989三木市立星陽中学校教諭に再転任[1][2][3][4][5]
    Transferred back to Miki Municipal Seiyo Junior High School as a teacher
  9. Apr 1986ニューデリー日本人学校に派遣教諭として勤務[1][2][3][4][5]
    Worked as a dispatched teacher at the New Delhi Japanese School in India
  10. Apr 1981三木市立星陽中学校教諭として転任[1][2][3][4]
    Transferred to Miki Municipal Seiyo Junior High School as a teacher
  11. Apr 1980兵庫県三木市立志染中学校教諭に就任[1][2][3][4][5]
    Appointed as a teacher at Miki Municipal Shizimi Junior High School, Hyogo Prefecture

Education

  1. Mar 1980奈良教育大学教育学部を卒業[1][2][3][4][5]
    Graduated from the Faculty of Education, Nara University of Education
  2. Mar 1975兵庫県立豊岡高等学校を卒業[1][2][3]
    Graduated from Hyogo Prefectural Toyooka High School

Other

  1. Jul 21, 2019第25回参議院議員選挙(比例代表)にて当選[1][2][3][4]
    Elected to the House of Councillors (Proportional representation)
  2. Jul 11, 2010第22回参議院議員選挙(兵庫県選挙区)にて再選[1][2][3][4]
    Re-elected to the House of Councillors (Hyogo At-large district)
  3. Jul 11, 2004第20回参議院議員選挙(兵庫県選挙区)にて初当選[1][2][3][4][5]
    Elected for the first time to the House of Councillors (Hyogo At-large district)
  4. Jun 13, 1956兵庫県豊岡市に生まれる[1][2][3][4][5][6]
    Born in Toyooka City, Hyogo Prefecture

Elections

ElectionDateConstituencyPartyResultVotesRateSource
第27回参議院議員選挙 2025年 比例区全国比例区
27th House of Councillors election 2025 nationwide proportional representation
2025-07-20
PR only
立憲民主党
Constitutional Democratic Party
Elected
第25回参議院議員選挙 比例区全国比例区
25th House of Councillors election nationwide proportional representation
2019-07-21
PR only
立憲民主党
Constitutional Democratic Party
Elected
第24回参議院議員選挙
24th House of Councillors election
2016-07-10
兵庫選挙区
Hyogo Constituency
民進党
The Democratic Party
420,068
第22回参議院議員選挙
22nd House of Councillors election
2010-07-11
兵庫選挙区
Hyogo Constituency
民主党
The Democratic Party of Japan
Elected515,541
第20回参議院議員選挙
20th House of Councillors election
2004-07-11
兵庫選挙区
Hyogo Constituency
民主党
The Democratic Party of Japan
Elected910,114

Committee memberships

常任委員会· Standing Committee

  • 環境委員会
    Committee on Environment
    委員· Member

特別委員会· Special Committee

  • 災害対策及び東日本大震災復興特別委員会
    Special Committee on Disasters Management and Reconstruction after the Great East Japan Earthquake
    委員· Member

Offices

Diet Office

参議院議員会館
参議院議員会館
Room
305
Fax
03-6551-0305

Web & social