Past officers
2013
- Chairperson：Hiromi Nakaiwa
- Vice-chairperson：Eiichiro Sumita
- Directors：Takenobu Tokunaga, Kentaro Inui, Makoto Yamazaki, Akiko Aizawa, Satoshi Sato, Gen'ichiro Kikui, Manabu Sassano, Satoshi Sekine, Kyoko Ohara, Daigo Taguchi, Susumu Akamine, Takehito Utsuro, Kiyoaki Shirai
- Auditor：Noriyoshi Uratani, Hiroaki Saito
- Principal Editor in Chief：Eiichiro Sumita
- Editor in Chief：Takenobu Tokunaga
2012
- Chairperson：Hiromi Nakaiwa
- Vice-chairperson：Eiichiro Sumita
- Directors：Takenobu Tokunaga, Kentaro Inui, Makoto Yamazaki, Akiko Aizawa, Satoshi Sato, Gen'ichiro Kikui, Manabu Sassano, Satoshi Sekine, Kyoko Ohara, Daigo Taguchi, Takehito Utsuro, Jun'ichi Fukumoto, Kiyoaki Shirai
- Auditor：Noriyoshi Uratani, Hiroaki Saito
- Principal Editor in Chief：Eiichiro Sumita
- Editor in Chief：Takenobu Tokunaga
2011
- Chairperson：Koiti Hasida
- Vice-chairperson：Hiromi Nakaiwa
- Directors：Eiichiro Sumita, Kentaro Inui, Tsunao Ogino, Satoshi Sato, Sadao Kurohashi, Manabu Sassano, Manabu Okumura, Wakako Kashino, Daigo Taguchi, Jin'ichi Murakami, Takehito Utsuro
- Auditor：Akira Kurematsu, Hiroaki Saito
- Principal Editor in Chief：Hiromi Nakaiwa
- Editor in Chief：Eiichiro Sumita
2010
- Chairperson：Koiti Hasida
- Vice-chairperson：Hiromi Nakaiwa
- Directors：Tsunao Ogino, Satoshi Sato, Eiichiro Sumita, Sadao Kurohashi, Manabu Okumura, Wakako Kashino, Jin'ichi Murakami, Manabu Sassano, Daigo Taguchi, Takehito Utsuro, Kentaro Inui
- Auditor：Hiroaki Saito
- Principal Editor in Chief：Hiromi Nakaiwa
- Editor in Chief：Eiichiro Sumita
2009
- Chairperson：Satoru Ikehara
- Vice-chairperson：Koiti Hasida
- Directors：Tsunao Ogino, Hitoshi Isahara, Hiromi Nakaiwa, Satoshi Tojo, Qing Ma, Tsuneaki Kato, Hiroaki Saito, Tatsunori Mori, Eiichiro Sumita, Sadao Kurohashi, Manabu Okumura, Wakako Kashino, Jin'ichi Murakami
- Auditor：Akira Kurematsu, Kikuko Nishina
- Principal Editor in Chief：Koiti Hasida
- Editor in Chief：Hiromi Nakaiwa
2008
- Chairperson：Satoru Ikehara
- Vice-chairperson：Koiti Hasida
- Directors：Tsunao Ogino, Hitoshi Isahara, Hiromi Nakaiwa, Satoshi Tojo, Qing Ma, Tsuneaki Kato, Hiroaki Saito, Tatsunori Mori, Eiichiro Sumita, Sadao Kurohashi, Manabu Okumura, Wakako Kashino, Jin'ichi Murakami
- Auditor：Akira Kurematsu, Kikuko Nishina
- Principal Editor in Chief：Koiti Hasida
- Editor in Chief：Hiromi Nakaiwa
2007
- Chairperson：Shun Ishizaki
- Vice-chairperson：Satoru Ikehara
- Directors：Hitoshi Isahara, Koiti Hasida, Satoshi Kinsui, Hiromi Nakaiwa, Tatsuya Kawahara, Naoyoshi Tamura, Jiro Nagase, Yoshiki Niwa, Satoshi Tojo, Qing Ma, Tsuneaki Kato, Hiroaki Saito, Tatsunori Mori
- Auditor：Hitoshi Iida, Kikuko Nishina
- Principal Editor in Chief：Satoru Ikehara
- Editor in Chief：Koiti Hasida
2006
- Chairperson：Shun Ishizaki
- Vice-chairperson：Satoru Ikehara
- Directors：Hitoshi Isahara, Koiti Hasida, Satoshi Kinsui, Hiromi Nakaiwa, Tatsuya Kawahara, Naoyoshi Tamura, Jiro Nagase, Yoshiki Niwa, Satoshi Tojo, Qing Ma, Tsuneaki Kato, Hiroaki Saito, Tatsunori Mori
- Auditor：Hitoshi Iida, Kikuko Nishina
- Principal Editor in Chief：Satoru Ikehara
- Editor in Chief：Koiti Hasida
2005
- Chairperson：Hiroshi Nakagawa
- Vice-chairperson：Shun Ishizaki
- Directors：Satoru Ikehara, Shigeru Satoh, Tsutomu Endou, Jun-ichi Aoe, Kenji Araki, Hideki Tanaka, Kikuko Nishina, Satoshi Kinsui, Hiromi Nakaiwa, Tatsuya Kawahara, Naoyoshi Tamura, Jiro Nagase, Yoshiki Niwa
- Auditor：Terumasa Ehara, Yutaka Kusanagi
- Principal Editor in Chief：Shun Ishizaki
- Editor in Chief：Satoru Ikehara
2004
- Chairperson：Hiroshi Nakagawa
- Vice-chairperson：Shun Ishizaki
- Directors：Satoru Ikehara, Shigeru Satoh, Tsutomu Endou, Jun-ichi Aoe, Kenji Araki, Hideki Tanaka, Kikuko Nishina, Satoshi Kinsui, Hiromi Nakaiwa, Tatsuya Kawahara, Naoyoshi Tamura, Jiro Nagase, Yoshiki Niwa
- Auditor：Terumasa Ehara, Yutaka Kusanagi
- Principal Editor in Chief：Shun Ishizaki
- Editor in Chief：Satoru Ikehara
2003
- Chairperson：Akira Shimazu
- Vice-chairperson：Hiroshi Nakagawa
- Directors：Takao Gunji, Shuichi Itahashi, Satoshi Sato, Yasuhiko Kato, Yoshihiko Hayashi, Takenobu Tokunaga, Shun Ishizaki, Shigeru Satoh, Tsutomu Endou, Jun-ichi Aoe, Kenji Araki, Hideki Tanaka, Kikuko Nishina
- Auditor：Terumasa Ehara, Yutaka Kusanagi
- Principal Editor in Chief：Hiroshi Nakagawa
- Editor in Chief：Shun Ishizaki
2002
- Chairperson：Akira Shimazu
- Vice-chairperson：Hiroshi Nakagawa
- Directors：Takao Gunji, Shuichi Itahashi, Satoshi Sato, Yasuhiko Kato, Yoshihiko Hayashi, Takenobu Tokunaga, Shun Ishizaki, Shigeru Satoh, Tsutomu Endou, Jun-ichi Aoe, Kenji Araki, Hideki Tanaka, Kikuko Nishina
- Auditor：Terumasa Ehara, Yutaka Kusanagi
- Principal Editor in Chief：Hiroshi Nakagawa
- Editor in Chief：Shun Ishizaki
2001
- Chairperson：Jun'ichi Tsujii
- Vice-chairperson：Akira Shimazu
- Directors：Yukinori Takubo, Satoru Ikehara, Hitoshi Isahara, Noriyoshi Uratani, Naoyuki Okada, Tetsunori Kobayashi, Koiti Hasida, Takao Gunji, Shuichi Itahashi, Satoshi Sato, Yasuhiko Kato, Yoshihiko Hayashi, Takenobu Tokunaga
- Auditor：Akira Kurematsu, Katsuhiko Shirai
- Principal Editor in Chief：Akira Shimazu
- Editor in Chief：Hiroshi Nakagawa
2000
- Chairperson：Jun'ichi Tsujii
- Vice-chairperson：Akira Shimazu
- Directors：Yukinori Takubo, Satoru Ikehara, Hitoshi Isahara, Noriyoshi Uratani, Naoyuki Okada, Tetsunori Kobayashi, Koiti Hasida, Takao Gunji, Shuichi Itahashi, Satoshi Sato, Yasuhiko Kato, Yoshihiko Hayashi, Takenobu Tokunaga
- Auditor：Akira Kurematsu, Katsuhiko Shirai
- Principal Editor in Chief：Akira Shimazu
- Editor in Chief：Hiroshi Nakagawa
1999
- Chairperson：Hitoshi Iida
- Vice-chairperson：Jun'ichi Tsujii
- Directors：Hiroshi Nakagawa, Hiroshi Nakano, Yasuhiro Katagiri, Tsunao Ogino, Satoshi Shirai, Yukinori Takubo, Satoru Ikehara, Hitoshi Isahara, Noriyoshi Uratani, Naoyuki Okada, Tetsunori Kobayashi, Koiti Hasida
- Auditor：Akira Kurematsu, Katsuhiko Shirai
- Principal Editor in Chief：Jun'ichi Tsujii
- Editor in Chief：Akira Shimazu
1998
- Chairperson：Hitoshi Iida
- Vice-chairperson：Jun'ichi Tsujii
- Directors：Hiroshi Nakagawa, Hiroshi Nakano, Yasuhiro Katagiri, Tsunao Ogino, Satoshi Shirai, Yukinori Takubo, Satoru Ikehara, Hitoshi Isahara, Noriyoshi Uratani, Naoyuki Okada, Tetsunori Kobayashi, Koiti Hasida
- Auditor：Akira Kurematsu, Katsuhiko Shirai
- Principal Editor in Chief：Jun'ichi Tsujii
- Editor in Chief：Akira Shimazu
1997
- Chairperson：Hozumi Tanaka
- Vice-chairperson：Hitoshi Iida
- Directors：Akira Kurematsu, Akira Shimazu, Terumasa Ehara, Jun'ichi Nakamura, Yuji Matsumoto, Jun'ichi Tsujii, Hiroshi Nakagawa, Hiroshi Nakano, Yasuhiro Katagiri, Tsunao Ogino, Satoshi Shirai
- Auditor：Toshio Ishiwata, Kazuhiro Fuchi
- Principal Editor in Chief：Akira Kurematsu
- Editor in Chief：Jun'ichi Tsujii
1996
- Chairperson：Hozumi Tanaka
- Vice-chairperson：Hitoshi Iida
- Directors：Akira Kurematsu, Akira Shimazu, Terumasa Ehara, Jun'ichi Nakamura, Yuji Matsumoto, Jun'ichi Tsujii, Hiroshi Nakagawa, Hiroshi Nakano, Yasuhiro Katagiri, Tsunao Ogino, Satoshi Shirai
- Auditor：Toshio Ishiwata, Kazuhiro Fuchi
- Principal Editor in Chief：Akira Kurematsu
- Editor in Chief：Jun'ichi Tsujii
1995
- Chairperson：Makoto Nagao
- Vice-chairperson：Hozumi Tanaka
- Directors：Akira Kurematsu, Akira Shimazu, Terumasa Ehara, Jun'ichi Nakamura, Yuji Matsumoto, Hitoshi Iida
- Auditor：Toshio Ishiwata, Kazuhiro Fuchi
- Editor in Chief：Akira Kurematsu
1994
- Chairperson：Makoto Nagao
- Vice-chairperson：Hozumi Tanaka
- Directors：Akira Kurematsu, Akira Shimazu, Terumasa Ehara, Jun'ichi Nakamura, Yuji Matsumoto, Hitoshi Iida
- Auditor：Toshio Ishiwata, Kazuhiro Fuchi
- Editor in Chief：Akira Kurematsu