
Born:
March 7, 1956, Oita Prefecture
Education:
1979 Kyushu University, School of Agriculture
Career:
1979 joined Oita Prefectural Government
2000 Member, Oita Prefectural Assembly (3 terms)
2010 first elected to the Senate
2019 second elected to the Senate
2025 third elected to the Senate
(Major posts in the Senate)
2021 Chairman, Committee on Oversight of Administration
2026 Chairman, Research Committee on Natural Resources
and Energy, Sustainable Society
(Major posts in a political parties)
2013 Leader, Social Democratic Party (SDP)
2020 Secretary General, SDP
2026 Chair of Board Meetings, The Constitutional Democratic
Party of Japan
Note: The Sangiin, which had been known as the House of Councillors, is called the Senate in English as of August 2026.
(as of October 26,2026)