1 October 2026Appointed Kamiya, Akihiro as Director
1 April 2026Appointed Ishikawa, Yoshinori as Secretary
31 March 2026Resigned Otani, Shuhei as Secretary
1 April 2025Appointed Yanagida, Takashi as Director
1 April 2025Appointed Otani, Shuhei as Secretary
1 April 2025Resigned Otaki, Toshiya as Secretary
1 April 2025Resigned Yamada, Hiroyuki as Director
1 January 2025Appointed Otaki, Toshiya as Secretary
1 January 2025Resigned Makino, Yuki as Secretary
31 March 2024Resigned Kikawa, Shinichi as Director
31 March 2024Appointed Yamada, Hiroyuki as Director
31 October 2023Resigned Sugano, Daisuke as Secretary
31 October 2023Appointed Makino, Yuki as Secretary
1 January 2023Resigned Shimizu, Masaaki as Secretary
1 January 2023Appointed Sugano, Daisuke as Secretary
2 October 2020Resigned Tsurui, Teruo as Secretary
2 October 2020Appointed Shimizu, Masaaki as Secretary
20 May 2019Appointed Kikawa, Shinichi as Director
20 May 2019Resigned Minamide, Toshiomi as Director
15 August 2017Appointed Tsurui, Teruo as Secretary
15 August 2017Resigned Nagahama, Kazuhiro as Secretary
2 November 2015Appointed Minamide, Toshiomi as Director
2 November 2015Resigned Takaoka, Yoshikazu as Director
1 November 2014Appointed Nagahama, Kazuhiro as Secretary
1 November 2014Resigned Hirose, Yoshinori as Secretary
1 November 2012Appointed Hirose, Yoshinori as Secretary
1 November 2012Resigned Abe, Shinichiro as Secretary
1 May 2012Appointed Takaoka, Yoshikazu as Director
1 May 2012Resigned Machii, Koji as Director
1 April 2011Resigned Kuwayama, Tomohiro as Secretary
1 April 2011Appointed Abe, Shinichiro as Secretary
25 January 2010Appointed Machii, Koji as Director
25 January 2010Resigned Tanigawa, Masayuki as Director
12 March 2007Resigned Idemitsu, Kiyoaki as Director
12 March 2007Appointed Tanigawa, Masayuki as Director
18 June 2004Appointed Kuwayama, Tomohiro as Secretary
18 June 2004Resigned Nishii, Mikio as Director
18 June 2004Resigned Nishii, Mikio as Secretary
18 November 2003Resigned Nishimura, Yoshimasa as Secretary
18 November 2003Appointed Nishii, Mikio as Secretary
4 December 2000Appointed Idemitsu, Kiyoaki as Director
6 October 2000Appointed Nishii, Mikio as Director
6 October 2000Resigned Murakami, Kazuhiro as Director
6 October 2000Resigned Nishii, Mikio as Secretary
6 October 2000Appointed Nishimura, Yoshimasa as Secretary
1 December 1999Resigned Kasahara, Katsura as Director
1 December 1999Appointed Murakami, Kazuhiro as Director
2 August 1999Appointed Nishii, Mikio as Secretary
2 August 1999Resigned Idemitsu, Kiyoaki as Secretary
27 January 1998Appointed Idemitsu, Kiyoaki as Secretary
27 January 1998Appointed Kasahara, Katsura as Director