23 October 2025Resigned Shibuya, Naoki as Director
23 October 2025Appointed Shimizu, Takahiro as Director
23 October 2025Resigned Miyakuni, Yoichiro as Director
31 May 2025Resigned Eunson, Graham Robert as Director
23 March 2021Resigned Nagase, Takehiro as Director
1 August 2020Resigned Kimura, Mutsumi as Director
1 August 2020Appointed Nagase, Takehiro as Director
1 August 2020Resigned Yamaoka, Toshiya as Director
1 August 2020Appointed Miyakuni, Yoichiro as Director
1 August 2020Resigned Ito, Kazuyoshi as Director
1 August 2020Appointed Shibuya, Naoki as Director
1 August 2020Resigned Uetsuji, Masumi as Director
31 May 2019Resigned Anderson, Robert William as Director
31 May 2019Appointed Eunson, Graham Robert as Director
31 May 2018Appointed Kimura, Mutsumi as Director
31 May 2018Appointed Uetsuji, Masumi as Director
31 May 2018Resigned Kakimoto, Toshio as Director
1 May 2017Resigned Yamada, Hideki as Director
1 May 2017Appointed Mori, Minori as Director
1 May 2017Appointed Yamaoka, Toshiya as Director
1 May 2017Resigned Nakao, Daisuke as Director
30 September 2016Resigned Ogasawara, Yuichi as Director
30 September 2016Appointed Higashino, Satoshi as Director
30 April 2014Resigned Kamada, Hiroshi as Director
30 April 2014Appointed Kakimoto, Toshio as Director
30 April 2014Resigned Omiya, Tadashi as Director
14 May 2013Appointed Yamada, Hideki as Director
25 April 2012Resigned Narita, Ken as Director
25 April 2012Appointed Ogasawara, Yuichi as Director
30 April 2011Resigned Kida, Takemi as Director
30 April 2011Resigned Goto, Isao as Director
27 April 2011Appointed Omiya, Tadashi as Director
27 April 2011Appointed Kamada, Hiroshi as Director
31 August 2010Resigned Mcculloch, Thomas Rowan as Director
28 April 2010Appointed Kida, Takemi as Director
28 April 2010Resigned Kasai, Masayoshi as Director
28 April 2010Appointed Davis, Catherine Anne as Secretary
28 April 2010Resigned Anderson, Robert William as Secretary
29 April 2009Resigned Yoshimura, Masahiko as Director
29 April 2009Appointed Kasai, Masayoshi as Director
29 April 2008Resigned Miyake, Koji as Director
29 April 2008Appointed Ito, Kazuyoshi as Director
29 April 2008Appointed Nakao, Daisuke as Director
29 April 2008Appointed Yoshimura, Masahiko as Director
29 April 2008Resigned Kanauchi, Kazuhiro as Director
30 June 2007Resigned Takahashi, Shin as Director
12 April 2007Appointed Miyake, Koji as Director
12 April 2007Resigned Kida, Takemi as Director
26 April 2006Appointed Narita, Ken as Director
26 April 2006Appointed Goto, Isao as Director
26 April 2006Appointed Kida, Takemi as Director
26 April 2006Resigned Yasuda, Tetsuo as Director
14 April 2005Resigned Morimoto, Kunihuiro as Director
14 April 2005Appointed Ito, Hiroyuki as Director
29 June 2004Appointed Takahashi, Shin as Director
29 June 2004Appointed Kanauchi, Kazuhiro as Director
29 June 2004Resigned Hayashi, Koichi as Director
24 March 2004Appointed Anderson, Robert William as Director
24 March 2004Appointed Morimoto, Kunihuiro as Director
15 May 2003Resigned Shimasaki, Ryuhei as Director
15 May 2003Resigned Matsui, Kenichi as Director
15 May 2002Appointed Yasuda, Tetsuo as Director
21 March 2002Resigned Sasaki, Takeshi as Director
21 March 2002Appointed Mcculloch, Thomas Rowan as Director
21 March 2002Resigned Akiyama, Toshiaki as Director
21 March 2002Appointed Shimasaki, Ryuhei as Director
21 March 2002Appointed Hayashi, Koichi as Director
29 March 2001Appointed Sasaki, Takeshi as Director
29 March 2001Resigned Maruyama, Keiji as Director
15 December 2000Resigned Tanaka, Yutaka as Director
1 June 1999Resigned Ushiki, Atsushi as Director
1 June 1999Appointed Akiyama, Toshiaki as Director
17 March 1999Resigned Kayano, Teiji as Director
17 March 1999Appointed Maruyama, Keiji as Director
25 September 1998Appointed Tanaka, Yutaka as Director
25 September 1998Appointed Ushiki, Atsushi as Director
25 September 1998Appointed Kayano, Teiji as Director
19 March 1998Appointed Matsui, Kenichi as Director
19 March 1998Resigned Nakamura, Teruya as Director
14 October 1997Resigned Fujibayashi, Tsutomu as Secretary
14 October 1997Appointed Anderson, Robert William as Secretary
19 March 1996Appointed Nakamura, Teruya as Director
26 June 1992Resigned Sato, Tadao as Director
14 August 1991Resigned Mitomi, Takeshi as Secretary
14 August 1991Appointed Fujibayashi, Tsutomu as Secretary
7 March 1990Resigned Tanizawa, Hiroshi as Director