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Fumiya Kokubu is Chairman at Marubeni Corp. In his past career he held the position of President & Chief Executive Officer of Marubeni America Corp. Mr. Kokubu received an undergraduate degree from Graduate School of Economics, Keio University.

Fumiya Abe worked as a Director and Deputy General Manager-Operations at SOLXYZ Co., Ltd.
from 1990 to 2014.
He also worked as a Director at Teco KK.

Fumiya Yamamoto currently works as a Director & Executive Officer at JTC, Inc.

Fumiya Kato is currently working as a Director at ReYuu Japan, Inc. and as an Operating Officer at Showcase, Inc. (Japan).

Fumiya Yazaki currently works as a Director at Zenkoku Chintai Kanri Business Kyokai.

Fumiya Haraguchi has a current job as an Outside Director at Softfront Holdings.

Akio Kokubu is currently a Representative Director at Hyakugo Leasing Co., Ltd.
He was previously a Managing Director at The Hyakugo Bank, Ltd.
in 1978.

Tatsuo Kokubu currently works at Kokubu Group Corp., as Auditor from 2016.

Joe Kokubu is currently working as a Manager at Asahi Kasei Corporate Venture Capital.
He completed his undergraduate degree from Waseda University.

Issei joined GB in 2022, focusing on HR support for portfolio startups including talent hiring.
He first worked at Rakuten, where he later specialized in headhunting for startups.
Prior to GB, he worked at a startup as the sole HR personnel, recruiting members in various positions ranging from the business side to back office.
Issei loves watching baseball games and making cakes and cookies.

Nobuaki Kokubu has worked as a Director at Washington Hotel Corp.
since 2018.

Mikio Kokubu currently works at Tokyo Broadcasting System Television, Inc., as MD, Head-Accounting & General Affairs from 2018 and TBS Holdings, Inc., as Group Senior Executive Officer from 2020.

Hiroshi Kokubu currently works at Shandong Guangyin DKK Environment Technology Co., Ltd., as Vice Chairman from 2014, Shandong Guangyin DKK New Materials Co., Ltd., as Vice Chairman from 2014, Suihua Shanghai Trading Co. Ltd., as Chairman from 2017, Daiichi Kigenso Kagaku Kogyo Co., Ltd., as President & Representative Director from 2022, and IDU Co. Ltd., as Director from 2016.

Akira Kokubu is currently the President, COO & Representative Director of Kokubu Group Corp.

Hidetaka Kokubu currently works at Animax Broadcast Japan, Inc., as Director.

Kanbei Kokubu is the Chairman & Chief Executive Officer of Kokubu Group Corp.

Yasutaka Kokubu currently works at Kokubu Group Corp., as Director & Executive Vice President from 2016.

Fumiya Akai was an Independent Outside Director at Keisei Electric Railway Co., Ltd.

Fumiya Kawai is currently the Chief Executive Officer & Representative Director at Modelmap KK.
Prior to this, he worked as a Quants Analyst at Daiwa Securities Capital Markets Co., Ltd.
and Daiwa Securities Co. Ltd.
(Broker).

Fumiya Nakamura is currently working as a Senior Executive Officer & Manager-Finance at Premium Group Co., Ltd.

Fumiya Ito currently works at J Frontier Co., Ltd., as Independent Outside Director from 2018, Triumfield Holdings Co., Ltd., as Outside Director from 2018, and Aqua CPA Office, as Representative Director from 2009.