◆1st
　Kunio Kawaishi
　Aug. 1, 1953～Apr. 1, 1956

◆2nd
　Kazuyoshi Nishimaru
　Apr. 1, 1956～Oct. 22, 1956

◆3rd
　Naokichi Suzuki
　Oct. 22, 1956～Mar. 31, 1958

◆4th
　Susumu Watanabe
　Mar. 31, 1958～Mar. 31, 1960

◆5th
　Hiroshi Tsukamoto
　Mar. 31, 1960（Acting Director）
　Apr. 1, 1960～Mar. 31, 1962

◆6th
　Masayuki Nakatsuka
　Apr. 1, 1962～Mar. 31, 1964

◆7th
　Jiro Uraki
　Apr. 1, 1964～Mar. 31, 1966

◆8th
　Masayuki Nakatsuka
　Apr. 1, 1966～May 6, 1969

◆9th
　Jiro Uraki
　May 7, 1969～May 21, 1969（Acting Director）
　May 22, 1969～Oct. 13, 1969

◆10th
　Hiroshi Kobayashi
　Oct. 13, 1969～Mar. 12, 1970（Acting Director）
　Mar. 12, 1970～Mar. 11, 1974

◆11th
　Juzo Sawano
　Mar. 12, 1974～Apr. 1, 1977

◆12th
　Takuso Yamura
　Apr. 2, 1977～Apr. 1, 1979

◆13th
　Hiromi Nihira
　Apr. 2, 1979～Apr. 1, 1981

◆14th
　Takuso Yamura
　Apr. 2, 1981～Apr. 1, 1982

◆15th
　Yukio Nishimoto
　Apr. 2, 1982～Sep. 10, 1985

◆16th
　Yoshiyasu Matsuo
　Sep. 10, 1985～Oct. 1, 1985（Acting Director）
　Oct. 1, 1985～Mar. 31, 1986

◆17th
　Shoji Tokuoka
　Apr. 1, 1986～Mar. 31, 1988

◆18th
　Michio Morio
　Apr. 1, 1988～Mar. 31, 1990

◆19th
　Yasuo Harada
　Apr. 1, 1990～May 20, 1993

◆20th
　Takeshi Kawasaki
　May 21, 1993～Mar. 31, 1994

◆21st
　Kanji Choshi
　Mar. 31, 1994～Mar. 31, 1996

◆22th
　Fumitaka Yoshinaga
　Apr. 1, 1996～Mar. 31, 1998

◆23rd
　Yuichirio Matsuura
　Apr. 1, 1998～Mar. 31, 2000

◆24th
　Kozo Ohama
　Apr. 1, 2000～Mar. 31, 2002

◆25th
　Koki Inai
　Apr. 1, 2002～Mar. 31, 2006

◆26th
　Nobuoki Kono
　Apr. 1, 2006～Mar. 31, 2010

◆27th
　Masao Yoshizumi
　Apr. 1, 2010～Mar. 31, 2014

◆28th
　Yasuki Kihara
　Apr. 1, 2014～Mar. 31, 2016

◆29th
　Michihiro Hide
　Apr. 1, 2016～Mar. 31, 2020

◆30th
　Kazuo Awai
　Apr. 1, 2020～Mar. 31, 2024

◆31st
　Kazuo Awai
　Apr. 1, 2024～（Acting Director）