1 April 2025Resigned Kimoto, Junichi as Director
1 April 2025Appointed Saito., Kurahito as Director
1 April 2023Appointed Hagiwara, Takaaki as Director
31 March 2023Resigned Takasawa, Tsukasa as Director
1 April 2021Appointed Kimoto, Junichi as Director
1 April 2021Resigned Ishizaki, Masahiro as Director
1 October 2019Appointed Takasawa, Tsukasa as Director
1 April 2018Appointed Ishizaki, Masahiro as Director
1 April 2018Resigned Miura, Susumu as Director
1 October 2017Resigned Kawashima, Tsuyoshi as Director
1 April 2017Appointed Miura, Susumu as Director
1 April 2016Resigned Nakata, Yoshihide as Director
1 April 2015Resigned Nakano, Takatoshi as Director
1 April 2015Appointed Nakata, Yoshihide as Director
26 November 2013Appointed Kawashima, Tsuyoshi as Director
26 November 2013Resigned Takahashi, Hiroaki as Director
31 December 2012Appointed Nakano, Takatoshi as Director
1 April 2011Appointed Takahashi, Hiroaki as Director
1 April 2002Resigned Shimizu, Keisuke as Director
6 October 1999Appointed Shimizu, Keisuke as Director
1 December 1993Resigned Kozakai, Akira as Director
12 February 1993Resigned Kozakai, Akira as Secretary
20 May 1991Resigned Yae, Kamiaki as Director