Born:
 April 25, 1967, Shizuoka Prefecture
 
Education:
 1989 studied at Tel Aviv University, Israel, for 1 year
 1991 Graduated from Otterbein University, Ohio, United
    States, Political Science and International Affairs
 1991-93 studied at Graduate School of the Hebrew
      University, Jerusalem, Israel
 
Career:
 1994 Member, Kikugawa Town Assembly (1 term)
 2001 first elected to the Senate
 2007 second elected to the Senate
 2013 third elected to the Senate
 2019 fourth elected to the Senate
 2025 fifth elected to the Senate
 
(Major posts in the Senate)
 2009 Chairman, Committee on Foreign Affairs and Defense
 2013 Chairman, Special Committee on Political Ethics and
    Election System
 2017 Chairman, Committee on Cabinet
 2021 Chairman, Special Committee on Okinawa and
    Northern Problems
 2025 Chairman, Special Committee on Reconstruction after
    the Great East Japan Earthquake
 
(Major posts in the Government)
 2009 State Minister of Defense
 2012 State Minister for Foreign Affairs
 
(Major posts in political parties)
 2013 Chair, Democratic Party of Japan Caucus Diet Affairs
    Committee in the Senate
 2016 Chair, The Democratic Party Caucus Diet Affairs
    Committee in the Senate
 2018 Secretary General, Democratic Party For the People
    (DPFP) Caucus in the Senate
 2020 Secretary General, DPFP
 
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)