Term 9: April 2016 - March 2018
Term 8: April 2014 - March 2016
| President | Mikiko Siomi |
| Council Officers | Hiroyuki Hori, Kunio Inoue, Yuji Kageyama, Naoyuki Kataoka, Shinichi Nakagawa, Mutsuhito Ohno (Vice Chair), Haruhiko Siomi, Mikiko Siomi (President), Yukihide Tomari, Tohru Yoshihisa |
| General Affairs Secretary | Hidehito Kuroyanagi |
| Finance Secretary | Reiko Sugiura (FY2014), Masato Yano (FY2015) |
| Editorial Secretary | Makoto Kitabatake |
| Meetings Secretaries | Shinichi Hoshino (FY2014), Tetsuro Hirose (FY2015) |
| Financial Auditors | Tsutomu Suzuki, Nono Takeuchi-Tomita |
| Internationalization Officer | Yuka W. Iwasaki |
| Gender Equality Officer | Satomi Kuramochi-Miyagawa |
Term 7: April 2012 - March 2014
| President | Haruhiko Siomi |
| Council Officers | Toshifumi Inada, Kunio Inoue, Toshio Uchiumi, Mutsuhito Ohno, Haruhiko Siomi (President), Tsutomu Suzuki (Vice Chair), Tokio Tani, Yukihide Tomari, Tetsuro Hirose, Tohru Yoshihisa |
| General Affairs Secretary | Naoyuki Kataoka |
| Finance Secretary | Reiko Sugiura |
| Editorial Secretary | Shinichi Nakagawa |
| Meetings Secretaries | Toshifumi Inada, Hiroyuki Hori |
| Financial Auditors | Senya Matsufuji, Kozo Tomita |
| Internationalization Officer | Derek Goto |
| Gender Equality Officer | Satomi Kuramochi-Miyagawa |
Term 6: April 2010 - March 2012
| President | Haruhiko Siomi |
| Council Officers | Toshifumi Inada, Toshio Uchiumi, Haruhiko Siomi (President), Mikiko Siomi, Tsutomu Suzuki (Vice Chair), Tokio Tani, Yukihide Tomari, Yoshikazu Nakamura, Tetsuro Hirose, Tohru Yoshihisa |
| General Affairs Secretary | Naoyuki Kataoka |
| Finance Secretary | Taiichi Sakamoto |
| Editorial Secretary | Akira Nakamura |
| Meetings Secretary | Tsutomu Suzuki |
| Financial Auditors | Hiroji Aiba, Hiroshi Sakamoto |
Term 5: April 2008 - March 2010
| President | Yoshikazu Nakamura |
| Concil Officers | Hiroji Aiba (Vice Chairman), Toshifumi Inada, Kunio Inoue, Yoshikazu Nakamura, Mutsuhito Ohno, Hiroshi Sakamoto, Mikiko Siomi, Tsutomu Suzuki, Tokio Tani, Tetsuro Hirose |
| General Affairs Secretary | Tohru Yoshihisa |
| Finance Secretary | Taiichi Sakamoto |
| Editorial Secretary | Yoshiya Ikawa |
| Meetings Secretaries | Satoshi Naito, Toshio Uchium |
| Financial Auditors | Senya Matsufuji, Naoya Kenmochi |
Term 4: April 2006 - March 2008
| President | Yoshikazu Nakamura |
| Council Officers | Hiroji Aiba, Kiyokazu Agata, Kunio Inoue, Toshio Uchiumi, Yoshikazu Nakamura, Mutsuhito Ohno, Gota Kawai, Haruhiko Siomi (Vice Chairman), Mikiko Siomi, Senya Matsufuji |
| General Affairs Secretary | Tsutomu Suzuki |
| Finance Secretary | Toshifumi Inada |
| Editorial Secretary | Yoshiya Ikawa |
| Meetings Secretaries | Haruhiko Siomi, Hiroji Aiba |
| Financial Auditors | Norihiro Okada, Tohru Yoshihisa |
Term 3: April 2004 - March 2006
| President | Kimitsuna Watanabe |
| Council Officers | Kunio Inoue, Tan Inoue (Vice Chairman), Toshio Uchiumi, Mutsuhito Ohno, Hiroshi Sakamoto, Haruhiko Siomi, Yoshiro Shimura, Tokio Tani, Senya Matsufuji, Kimitsuna Watanabe |
| General Affairs Secretary | Tsutomu Suzuki |
| Finance Secretary | Gota Kawai |
| Editorial Secretary | Tohru Yoshihisa |
| Meetings Secretaries | Tokio Tani, Akira Muto |
| Financial Auditors | Shigeo Ohta, Haruhiko Masaki |
Term 2: April 2002 - March 2004
| President | Yoshiro Shimura |
| Council Officers | Tan Inoue, Toshio Uchiuni, Shigeo Ohta, Hiroshi Sakamoto, Haruhiko Siomi, Kazunari Taira, Tokio Tani, Yoshikazu Nakamura (Vice Chairman), Akira Muto, Yoshiro Shimura |
| General Affairs Secretary | Kunio Inoue |
| Finance Secretary | Gota Kawai |
| Editorial Secretary | Semya Matsufuji |
| Meetings Secretaries | Kazunari Taira, Tokio Tani |
| Financial Auditors | Seiichi Uesugi, Akio Nomoto |
Term 1: August 1999 - March 2002
| President | Yoshiro Shimura |
| Council Officers | Tan Inoue, Shigeo Ohta, Hiroshi Sakamoto, Tokio Tani, Yoshikazu Nakamura, Akio Nomoto, Akira Muto, Shigeyuki Yokoyama, Yoshiro Shimura, Kimitsuna Watanabe (Assistant to President) |
| General Affairs Secretary | Kunio Inoue |
| Finance Secretary | Toshio Uchiumi |
| Editorial Secretary | Horoji Aiba |
| Meeting Secretaries | Yoshikazu Nakamura, Kazunari Taira |
| Financial Auditors | Kiyohisa Mizumoto, Kazuya Nishikawa |