Born:
  June 9, 1960, Tokyo
 
Education:
 1987 Tohoku University, School of Medicine
 
Career:
 1979 joined the Japanese Communist Party (JCP)
 1984 Chairman, All-Japan Federation of
    Medical Students' Self-Governing Associations
 1985 Vice-Chairman, All-Japan Federation of
    Students' Self-Governing Associations
 1987 started practice as a Physician
 1998 Director, Japan Federation of Democratic Medical
    Institutions
 1998 elected as the Senate (1998-2004)
 2013 reelected as the Senate
 
(Major posts in a political party)
 2013 Vice-Chairperson of the Executive Committee, JCP
 2016 Head of the Secretariat, JCP
 
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)