The all the past director

Ryohei Sugiura
　April, 1971 - June, 1971
Hisamichi Matsushita
　July, 1971 - March, 1972
Nobuo Katayama
　April, 1972 - March, 1973
Shozo Misumi
　April, 1973 - March, 1974
Ryohei Takahashi
　April, 1974 - March, 1978
Ryukichi Sawada
　April, 1978 - February, 1980
Ryohei Takahashi
　February, 1980 - July, 1980
Tsugio Sudo
　July, 1980 - July, 1982
Ryohei Takahashi
　July, 1982 - March, 1986
Kazuya Ohta
　April, 1986 - March, 1998
Sadaomi Suzuki
　April, 1998 - March, 2004
Hiroshi Shimizu
　April, 2004 -