Shunichi Mizuoka

Shunichi Mizuoka
水岡 俊一
Official portrait, 2011
President of the Constitutional Democratic Party
Assumed office
19 January 2026
DeputyMasayo Tanabu
Preceded byYoshihiko Noda
Special Advisor to the Prime Minister
(Political and Parliamentary Affairs)
In office
2 September 2011 – 1 October 2012
Prime MinisterYoshihiko Noda
Member of the House of Councillors
Assumed office
29 July 2019
ConstituencyNational PR
In office
26 July 2004 – 25 July 2016
Preceded byShōji Motooka
Succeeded byTakae Itō
ConstituencyHyōgo at-large
Personal details
Born (1956-06-13) 13 June 1956
PartyCDP (since 2018)
Other political
affiliations
DPJ (2004–2016)
DP (2016–2018)
Alma materNara University of Education
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Shunichi Mizuoka (水岡 俊一, Mizuoka Shun'ichi; born June 13, 1956) is a Japanese politician of the Constitutional Democratic Party of Japan, a former member of the House of Councillors in the Diet (national legislature).