Cosmo Energy Holdings Co., Ltd.TSE: 5021

Announcement of Changes in Directors and Executive Officers

· Issued by Cosmo Energy Holdings Co., Ltd.


February 6, 2026 Cosmo Energy Holdings Co., Ltd.

Cosmo Oil Co., Ltd. Cosmo Energy Exploration & Production Co., Ltd.

Cosmo Oil Marketing Co., Ltd.

Announcement of Changes in Directors and Executive Officers

Cosmo Energy Holdings Co., Ltd. (hereafter, "Cosmo Energy Holdings"), together with Cosmo Oil Co., Ltd. (hereafter, "Cosmo Oil"), Cosmo Energy Exploration & Production Co., Ltd. (hereafter, "Cosmo Energy Exploration & Production"), and Cosmo Oil Marketing Co., Ltd. (hereafter, "Cosmo Oil Marketing"), is pleased to announce the following changes in the appointment of Directors and Executive Officers for FY2026 (April 1, 2026, to March 31, 2027).

Changes in the appointment of Cosmo Energy Holdings' Directors, effective June 26, 2026, will be formally approved at the General Meeting of Shareholders and the subsequent Board of Directors' meeting scheduled for the same day. Other changes will be formally approved at the upcoming General Meetings of Shareholders and Board of Directors' meetings of each respective company, and will take effect on April 1, 2026.

  1. Cosmo Energy Holdings

    1. Change in Representative Director (Effective April 1, 2026)

      Name

      New Position

      Current Position

      Junko Takeda

      Director

      Representative Director, Senior Executive Officer

    2. Change in Director (Effective June 25, 2026, excluding Directors who are Audit and Supervisory Committee Members)

      Name

      New Position

      Current Position

      Tadashi Okada (Newly Appointed)

      Director,

      Senior Executive Officer

      Director, Senior Executive Officer Cosmo Oil Marketing.

    3. Changes in Directors who are Audit and Supervisory Committee Members (Effective June 25, 2026)

      Name

      New Position

      Current Position

      Takayuki Uematsu

      (Resigned)

      Director,

      Audit and Supervisory Committee Member

      Junko Takeda (Newly Appointed)

      Director,

      Audit and Supervisory Committee Member

      Representative Director, Senior Executive Officer

    4. Changes in Executive Officers (Effective April 1, 2026)

      Name

      New Position

      Current Position

      Tadashi Okada (Newly Appointed)

      Senior Executive Officer

      Director, Senior Executive Officer Cosmo Oil Marketing.

      Takahiro Kudo (Newly Appointed)

      Executive Officer, General Manager Corporate Planning Dept.

      President, Representative Director,

      Cosmo Oil Lubricants Co., Ltd.

      Kazuo Nakaya (Newly Appointed)

      Executive Officer, General Manager IT Initiative Dept.

      General Manager IT Initiative Dept.

  2. Cosmo Oil

    (1) Change in Director (Effective April 1, 2026) Changes in Executive Officers (Effective April 1, 2026) Changes in Executive Officers (Effective April 1, 2026)

    Name

    New Position

    Current Position

    Koji Kusakari (Newly Appointed)

    Director, Executive Officer

    General Manager, Supply Dept.

  3. Cosmo Energy Exploration & Production

    (1) Change in Director (Effective April 1, 2026) None

  4. Cosmo Oil Marketing

(1) Change in Director (Effective April 1, 2026)

Name

New Position

Current Position

Hirotsugu Mizuki (Newly Appointed)

Director, Executive Officer

General Manager,

Dealer Sales Marketing Dept.

Reference: Other Personnel Change

Name

New Position

Current Position

Hirokatsu Harui

President, Representative Director, Cosmo Matsuyama Oil Co., LTD.

Director, Senior Executive Office General Manager, Sakai Refinery

(End)

(The official language for Cosmo Energy Group's filings with the Tokyo Stock Exchange and Japanese authorities, and for communications with our shareholders, is Japanese. We have posted English versions of some of this information on this website. While these English versions have been prepared in good faith, Cosmo Energy Group does not accept responsibility for the accuracy of the translations, and reference should be made to the original Japanese language materials.)

February 6, 2026 Cosmo Energy Holdings Co., Ltd.

Cosmo Oil Co., Ltd. Cosmo Energy Exploration & Production Co., Ltd.

Cosmo Oil Marketing Co., Ltd.

Cosmo Energy Holdings Responsibilities of Executives (Effective April 1, 2026)

Executive Officers

Position

Name

Areas of Responsibility

Chief Executive Officer

Shigeru Yamada

Group CEO

Senior Executive Officer

Taisuke Matsuoka

Corporate Planning Dept., Finance Dept.

Senior Executive Officer (Newly Appointed)

Tadashi Okada

Business Portfolio Management Dept.,

Sustainability Initiative Dept., Human Resource Dept.

Senior Executive Officer Chief Digital Officer

Noriko Rzonca

AX Strategy Dept., Corporate Communication Dept., IT Initiative Dept.

Senior Executive Officer

Hiroaki Ohtsuka

Power Business Management Dept., New Business Development Dept.

Senior Executive Officer

Tomoki Iwai

Legal & General Affairs Dept., Accounting Dept.

Executive Officer

Hideyuki Wakao

General Manager, Internal Auditing Office.

Executive Officer (Newly Appointed)

Takahiro Kudo

General Manager, Corporate Planning Dept.

Executive Officer (Newly Appointed)

Kazuo Nakaya

General Manager, IT Initiative Dept.

*The Internal Auditing Office and Secretariat Office are under the supervision of the Group CEO.

February 6, 2026 Cosmo Energy Holdings Co., Ltd.

Cosmo Oil Co., Ltd. Cosmo Energy Exploration & Production Co., Ltd.

Cosmo Oil Marketing Co., Ltd.

Cosmo Energy Holdings Responsibilities of Executives (Effective June 25, 2026)

Directors

Position

Name

Areas of Responsibility

Director,

Group Chairperson

Hiroshi Kiriyama

Chair of Board of Directors

Representative Director, Group CEO

Shigeru Yamada

Representative Director

Taisuke Matsuoka

Director

(Newly Appointed)

Tadashi Okada

Director

Shigeki Iwane

Independent Outside Director

Ryuko Inoue

Independent Outside Director

Takuya Kurita

Independent Outside Director

Takako Suzuki

Director,

Audit and Supervisory Committee Member (Newly Appointed)

Junko Takeda

(Concurrently serves as Audit and Supervisory Board Member of Cosmo Oil Co., Ltd., Cosmo Energy Exploration & Production Co., Ltd., and Cosmo Oil Marketing Co., Ltd.)

Independent Outside Director, Audit and Supervisory

Committee Member

Yasuko Takayama

Independent Outside Director, Audit and Supervisory

Committee Member

Keiichi Asai

Independent Outside Director, Audit and Supervisory

Committee Member

Toshihiro Kuriyama

February 6, 2026 Cosmo Energy Holdings Co., Ltd.

Cosmo Oil Co., Ltd. Cosmo Energy Exploration & Production Co., Ltd.

Cosmo Oil Marketing Co., Ltd.

Cosmo Oil Responsibilities of Executives (Effective April 1, 2026)

Position

Name

Areas of Responsibility

President, Representative

Director, Chief Executive Officer

Nishi Katsushi

Director,

Senior Executive Officer

Satoshi Iwase

Management Dept., Procurement Dept., Mechanical Reliability Dept., Refining & Technology Dept., Chiba Refinery, Yokkaichi Refinery, Sakai Refinery.

Director,

Senior Executive Officer

Hajime Nakashima

General Manager, Chiba Refinery.

Director, Executive Officer

Takeshi Takada

New Business Development Dept., Risk Management Dept.

Director, Executive Officer

Yasuhito Ohnishi

Planning Dept., Research & Development Center.

Director,

Executive Officer (Newly Appointed)

Koji Kusakari

Supply Dept., Crude Oil & Tanker Dept., Petroleum Products Dept.

Audit and Supervisory Board

Member Audit and Supervisory Board Member

Tadashi Kuroda

Audit and Supervisory Board

Member Audit and Supervisory Board Member

Yuzuru Ojima

Audit and Supervisory Board Member

Kumi Tabata

Audit and Supervisory Board Member

Takayuki Uematsu