国会議事堂
In 1953, he became an adherent of Soka Gakkai (as one of the lay organizations of Nichiren Shōshū). He attended Tokyo Metropolitan Bunkyo High School (now Tokyo Metropolitan Bunkyo Secondary Education School). He graduated from the University of Tokyo with the Bachelor of Economics degree. According to Soka Gakkai, he was a left-wing protester and a student activist, participating in the demonstration into the National Diet Building in the 1960s. He was the manager of the Student Division and the Youth Division of Soka Gakkai, and one of the Vice-Presidents of Soka Gakkai.