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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

◆30th
　AWAI Kazuo
　Apr. 1, 2020～Mar. 31, 2024
　Apr. 1, 2024～Jun. 30, 2024（Acting Director）

◆31st
　SHIME Nobuaki
　Jul. 1, 2024～