As of October 1, 2023
| Takeshi Nagata | 1973.9.29 - 1984.11.30 |
| Tatsuro Matsuda | 1984.12.1 - 1988.11.30 |
| Takao Hoshiai | 1988.12.1 - 1994.11.30 |
| Takeo Hirasawa | 1994.12.1 - 2000.11.30 |
| Okitsugu Watanabe | 2000.12.1 - 2004.11.30 |
| Hideki Shimamura | 2004.12.1 - 2005.4.30 |
| Masaki Ejiri | 2005.3.19 - 2005.9.30 *acting director |
| Yoshiyuki Fujii | 2005.10.1 - 2011.9.30 |
| Kazuyuki Shiraishi | 2011.10.1 - 2017.9.30 |
| Takuji Nakamura | 2017.10.1 - 2023.9.30 |