◆1st
　Jiro Urashiro
　Apr. 1, 1965～Aug. 31, 1965

◆2nd
　Yoshio Shima
　Sep. 1, 1965～Mar. 31, 1973

◆3rd
　Tokio Inoue
　Apr. 1, 1973～Mar. 31, 1977

◆4th
　Takafumi Moriyama
　Apr. 1, 1977～Mar. 31, 1980

◆5th
　Ichiji Imanishi
　Apr. 1, 1980～Apr. 1, 1982

◆6th
　Hiromichi Tsuru
　Apr. 2, 1982～Apr. 1, 1986

◆7th
　Akira Tsujimoto
　Apr. 2, 1986～Apr. 1, 1988

◆8th
　Kazuo Yamauchi
　Apr. 2, 1988～Apr. 1, 1990

◆9th
　Hiroshi Okamoto
　Apr. 2, 1990～Mar. 31, 1992

◆10th
　Hiromasa Nikai
　Apr. 1, 1992～Mar. 31, 1994

◆11st
　Hidekazu Suginaka
　Apr. 1, 1994～Mar. 31, 1996

◆12nd
　Yoshifumi Iwamoto
　Apr. 1, 1996～Mar. 31, 1997

◆13rd
　Nobuo Nagasaki
　Apr. 1, 1997～Mar. 31, 2000

◆14th
　Kazuo Tanne
　Apr. 1, 2000～Mar. 31, 2004

◆15th
　Hidemi Kurihara
　Apr. 1, 2004～Mar. 31, 2008

◆16th
　Takashi Takata
　Apr. 1, 2008～Mar. 31, 2012

◆17th
　Motoyuki Sugai
　Apr. 1, 2012～Mar. 31, 2016

◆18th
　Koichi Kato
　Apr. 1, 2016～Mar. 31, 2020

◆19th
　Kotaro Tanimoto
　Apr. 1, 2020～Mar. 31, 2024

◆20th
　Naoya Kakimoto
　Apr. 1, 2024～