◆1st
　Susumu Watanabe
　April 1, 1961 － March 31, 1967

◆2nd
　Kiyoshi Shimizu
　April 1, 1967 － March 31, 1970

◆3rd
　Naomasa Okamoto
　April 1, 1970 － March 31, 1977

◆4th
　Takeshi Ohkita
　April 1, 1977 － March 31, 1981

◆5th
　Kenjiro Yokoro
　April 1, 1981 － March 31, 1985

◆6th
　Minoru Kurihara
　April 1, 1985 － March 31, 1987

◆7th
　Takao Hattori
　April 1, 1987 － March 31, 1989

◆8th
　Atsushi Kuramoto
　April 1, 1989 － March 31, 1995

◆9th
　Yukio Sato
　April 1, 1995 － March 31, 1996

◆10th
　Tetsuya Toge
　April 1, 1996 － March 31, 1997

◆11th
　Nanao Kamada
　April 1, 1997 － March 31, 1999

◆12th
　Norihiko Hayakawa
　April 1, 1999 － March 31, 2001

◆13th
　Kenji Kamiya
　April 1, 2001 － March 31, 2005

◆14th
　Fumio Suzuki
　April 1, 2005 － March 31, 2009

◆15th
　Kenji Kamiya
　April 1, 2009 － March 31, 2013

◆16th
　Toshiya Inaba
　April 1, 2013 － October 31, 2015

   Shinya Matsuura
   November 1, 2015 － December 31, 2015（Acting Director）

◆17th
　Shinya Matsuura
　January 1, 2016 － March 31, 2019

◆18th
　Satoshi Tashiro
　April 1, 2019 － March 31, 2023

◆19th
　Yukihito Higashi
　April 1, 2023 －