After his resignation from that position, he became the chairman of the Supreme Leader Meeting of Soka Gakkai in November 2006.

He also had responsibilities in many Soka Gakkai's satellites (supreme advisor of Sōka University, honorary director of Tokyo Fuji Art Museum, and president of Soka Gakkai International (SGI).

degree in French Literature, he went to work at the Seikyo Shimbun company, Soka Gakkai's newspaper.

His brother-in-law, Kōshirō Ishida, is a former member of the House of Representatives in the National Diet and the former president of the New Komeito Party.

His older brother, Tsuguo Ishida, is a former member of the House of Councillors in the National Diet.