Past officers etc.
(As of June 2025, 8)
Honorary chairman
- October 1994 - March 11
Masamitsu Oshima (passed away in May 2010)
Chairman/Representative Director, Vice Chairman/Vice Representative Director
- October 1983 - March 4
Chairman: Masamitsu Oshima
Vice President: Mitsuharu Okajima - October 1994 - March 11
Chairman: Kaiyuan Chengyuan (passed away in January 2011)
Vice Chairman: Michitoshi Inoue - October 1997 - March 11
Chairman: Yoichi Satomura
Vice Chairman: Michitoshi Inoue
Vice Chairman: Takahashi Takashi - October 2000 - March 11
Chairman: Michitoshi Inoue
Vice Chairman: Hiroshi Tanaka
Vice Chairman: Kazunobu Yamauchi - November 2003 to June 11 (2004st period)
Chairman: Hiroshi Tanaka
Vice Chairman: Michio Kimura
Vice Chairman: Kazunobu Yamauchi - June 2004 to June 6 (2007nd to 6th period)
Chairman: Hiroshi Tanaka
Vice Chairman: Michio Kimura
Vice Chairman: Kazunobu Yamauchi - June 2007 to June 6 (2010nd to 6th period)
Chairman: Ryuichi Yamamoto
Vice Chairman: Michio Kimura
Vice Chairman: Kotaro Sakurai - June 2010 to June 6 (2013nd to 6th period)
Chairman: Michio Kimura
Vice Chairman: Kazuhiko Oe
Vice President: Mihoko Okada - June 2013 to June 6 (2016nd to 6th period)
Representative Director: Mihoko Okada
Vice Representative Director: Naoki Nakajima
Vice Representative Director: Masaki Miyamoto - June 2016 to June 6 (2019nd to 6th period)
Representative Director: Kazuhiko Oe
Vice Representative Director: Tomohiro Sawa
Vice Representative Director: Yasushi Matsumura - June 2019 to June 6 (2022nd to 6th period)
Representative Director: Naoki Nakajima
Vice Representative Director: Katsuyuki Kondo
Vice Representative Director: Tomohiro Sawa - June 2022 to June 6 (2025nd to 6th period)
Representative Director: Katsuhiko Ogasawara
Vice Representative Director: Ken Imai
Vice Representative Director: Hideto Yokoi