Board of Directors

Representative Director, President and Chief Executive Officer

Yoshiya OkadaApril 25, 1957

April 1984	Joined KBK
April 2003	General Manager, Information & Environment Systems Department
June 2005	Managing Director, KBK Europe GmbH
October 2009	General Manager, Industrial Systems Department
April 2011	Executive Officer General Manager, Industries & Resources Group General Manager, Industrial Systems Department
April 2013	Executive Officer General Manager, Industries & Resources Group General Manager, Domestic Subsidiaries Management Group
June 2013	Director and Executive Officer General Manager, Industries & Resources Group General Manager, Domestic Subsidiaries Management Group
April 2017	Director and Managing Executive Officer General Manager, Industries & Resources Group General Manager, Domestic Subsidiaries Management Group
April 2019	President and Chief Executive Officer General Manager, Sales Administration Office
April 2023	President and Chief Executive Officer General Manager, Sales Administration Office General Manager, Industrial Systems Division
April 2025	President and Chief Executive Officer General Manager, Sales Administration Office(to present)

Executive Vice President; General Manager

Shinji SakumaMay 22, 1963

April 1986	Joined KBK
July 2009	General Manager, Kyokuto Trading (Shanghai) Co.,Ltd.
May 2013	General Manager, Industrial Systems Department
April 2019	Executive Officer Deputy General Manager, Sales Administration Office General Manager, Basic Industry Division
June 2020	Director and Executive Officer Deputy General Manager, Sales Administration Office General Manager, Basic Industry Division
April 2021	Director and Executive Officer Deputy General Manager, Sales Administration Office General Manager, Mechanical Parts Division
June 2021	Director and Managing Executive Officer Deputy General Manager, Sales Administration Office General Manager, Mechanical Parts Division
June 2024	Director and Executive Vice President Deputy General Manager, Sales Administration Office General Manager, Mechanical Parts Division(to present)

Director and Managing Executive Officer

Tadamichi HattaDecember 9, 1965

April 1988	Joined Mitsubishi Kasei Corporation (currently Mitsubishi Chemical Corporation)
April 2018	Senior Associate Director Mitsubishi Chemical Corporation; General Manager, Tax Accounting Department, Mitsubishi Chemical Holdings Corporate Staff, Inc.
April 2019	Senior Associate Director, General Manager, Corporate Management Department, Mitsubishi Chemical Corporation
November 2020	Executive Director; General Manager, Corporate Management Department, Mitsubishi Chemical Corporation
April 2021	General Manager, Finance and Accounting Department, Life Science Institute, Inc.
September 2022	Joined BRIDGESTONE CORPORATION
July 2023	Joined the Company
January 2024	Executive Officer; General Manager, Corporate Division
June 2024	Director and Executive Officer; General Manager, Corporate Division
April 2025	Director and Managing Executive Officer; General Manager, Corporate Division (to present)

Director

Takashi FujinoFebruary 12, 1956

April 1979	Joined Asahi Glass Co., Ltd. (currently AGC Inc.)
January 2009	Executive Officer General Manager, Corporate Planning Office
January 2010	Senior Executive Officer CFO General Manager, President Office
March 2010	Director Senior Executive Officer CFO General Manager, President Office
January 2015	Director Senior Executive Officer Assistant to President
January 2015	Advisor, ISE CHEMICALS CORPORATION
March 2015	President and Chief Executive Officer
June 2021	Director, KBK (to present)
June 2023	Outside Audit & Supervisory Board Member, TDK Corporation (to present)

Director; Audit and Supervisory Committee Member

Hidehiko MaedaJuly 30, 1960

April 1984	Joined KBK
April 2012	General Manager, Personnel & General Affairs Department
April 2019	Senior General Manager General Manager, Personnel & General Affairs Department
April 2020	Exective Officer General Manager, Personnel & General Affairs Department
June 2020	Exective Officer General Manager, Sales Support Group General Manager, Personnel & General Affairs Department
April 2021	Exective Officer Deputy General Manager, Corporate Administration Office General Manager, Sales Support Group General Manager, Personnel & General Affairs Department
April 2022	Exective Officer Deputy General Manager, Corporate Administration Office General Manager, Corporate Division General Manager, Personnel & General Affairs Department
April 2023	Exective Officer (to present)

Director; Audit and Supervisory Committee Member

Mitsuharu KaizukaJune 14, 1970

October 2001	Registered as an attorney (Member, Dai-Ichi Tokyo Bar Association)
October 2001	Joined Tanabe & Partners (to present)
June 2019	Director (Audit and Supervisory Committee Member), KBK　(to present)

Director; Audit and Supervisory Committee Member

Mariko HidakaMay 4, 1961

April 1984	Joined Chuo Accounting Office
April 1987	Registered as certified public accountant (to present)
July 2000	Partner, Chuo Audit Corporation
July 2006	Senior Partner, ChuoAoyama Audit Corporation
August 2007	Senior Partner, Shin Nihon & Co.
June 2020	External Director, Tosoh Corporation (to present)
August 2020	Established Hidaka Certified Public Accountant Office (to present)
January 2021	Outside Auditor, SBI Sumishin Net Bank, Ltd. (to present)
June 2021	Director (Audit and Supervisory Committee Member), KBK　(to present)