| Inauguration Day |
President |
Vice President |
Chairman of the Board |
Representative Director |
Director |
| December 10, 1958 |
Shinji Yoshino |
Saburou Kojima |
Hamao Umezawa |
Masao Shimizu |
Hamao Umezawa |
| March 27, 1962 |
Shinji Yoshino |
Aaburou Kojima |
Hamao Umezawa |
Masao Shimizu |
Hamao Umezawa |
| December 14, 1964 |
Shinji Yoshino |
Tokuji Ichikawa |
Hamao Umezawa |
Tomio Takeuchi |
Hamao Umezawa |
| June 7, 1971 |
Tokuji Ichikawa |
Sumio Umezawa |
Hamao Umezawa |
Tomio Takeuchi |
Hamao Umezawa |
| February 3, 1987 |
Tokuji Ichikawa |
Sumio Umezawa |
Tomio Takeuchi |
Kenji Maeda |
Tomio Takeuchi |
| January 17, 1994 |
Sumio Umezawa |
Den-ichi Mizuno |
Tomio Takeuchi |
Kenji Maeda |
Tomio Takeuchi |
| July 5, 2000 |
Shigeo Morioka |
Den-ichi Mizuno |
Tomio Takeuchi |
Kenji Maeda |
Tomio Takeuchi |
| July 8, 2000 |
Tamio Yamakawa |
Teruhiko Beppu |
Yoshiaki Nonomura |
Yuzuru Akamatsu |
Yuzuru Akamatsu |
| April 1, 2010 |
Tamio Yamakawa |
Teruhiko Beppu |
Akio Nomoto |
Masakatsu Shibasaki |
Akio Nomoto, Masakatsu Shibasaki |
After reincorporation as a public-interest foundation
| Inauguration Day |
Chairman of the Board |
Representative Director |
Director |
| April 1, 2011 |
Akio Nomoto |
Masakatsu Shibasaki |
Akio Nomoto, Masakatsu Shibasaki |