25 April 2026Appointed Ogawa, Atsushi as Director
1 April 2025Appointed Hirota, Kazuhisa as Director
1 April 2025Appointed Yusaku, Noboru as Director
1 April 2025Resigned Wada, Takehiro as Director
1 April 2025Resigned Tasaki, Noboru as Director
1 April 2024Resigned Yamamoto, Kensaku as Director
1 April 2024Appointed Kato, Ryutaro as Director
1 April 2023Appointed Wada, Takehiro as Director
1 April 2023Resigned Arie, Shinichi as Director
1 April 2022Appointed Tasaki, Noboru as Director
1 April 2022Resigned Kimura, Akira as Director
1 March 2021Appointed Yamamoto, Kensaku as Director
1 February 2021Resigned Ozawa, Manabu as Director
1 June 2020Resigned Killham, Adrian Charles Franklin as Director
1 April 2020Resigned Hayashi, Hiroki as Director
1 April 2020Appointed Kimura, Akira as Director
1 April 2020Appointed Arie, Shinichi as Director
1 April 2017Appointed Killham, Adrian Charles Franklin as Director
1 October 2016Resigned Suzuki, Mikio as Director
1 October 2016Appointed Hayashi, Hiroki as Director
2 April 2015Appointed Suzuki, Mikio as Director
1 April 2015Appointed Ozawa, Manabu as Director
31 March 2015Resigned Takizawa, Soichiro as Director
31 March 2015Resigned Tsutsui, Tetsuya as Director
31 March 2015Resigned Ichimura, Hiroshi as Director
1 April 2013Appointed Takizawa, Soichiro as Director
1 April 2013Appointed Tsutsui, Tetsuya as Director
1 April 2013Resigned Komura, Hideo as Director
1 March 2013Appointed Ichimura, Hiroshi as Director
1 April 2011Resigned Yamamoto, Yoshiharu as Director
1 April 2011Appointed Komura, Hideo as Director
1 April 2006Resigned Suganuma, Hiroyuki as Director
1 April 2006Appointed Yamamoto, Yoshiharu as Director
1 April 2003Resigned Honda, Masanori as Director
1 April 2002Appointed Suganuma, Hiroyuki as Director
1 June 1998Appointed Honda, Masanori as Director
1 June 1998Resigned Fukatsu, Kensuke as Director
17 November 1992Appointed Fukatsu, Kensuke as Director