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Governance: Composition of the Board of Directors and Audit & Supervisory Board Members

Contents

Composition of the Board of Directors and Audit & Supervisory Board Members

As of June 26, 2026

Board of Directors

  • photo: Fumio Akiya

    Representative Director-Chairman of the Board Meeting

    Fumio Akiya

    In charge of Semiconductor Materials and Technologies
    Representative Director & President of Shin-Etsu Handotai Co., Ltd.

  • photo: Yasuhiko Saitoh

    Representative Director-President

    Yasuhiko Saitoh

    Director & President of Shintech Inc.
    Director & President of Shin-Etsu Handotai America, Inc.

  • photo: Susumu Ueno

    Director, Senior Managing Corporate Officer

    Susumu Ueno

    In charge of Silicone Chemical Technologies & Magnetic Materials Division

  • photo: Masahiko Todoroki

    Director, Senior Managing Corporate Officer

    Masahiko Todoroki

    In charge of Semiconductor Materials Dept.,
    Senior Managing Director of Shin-Etsu Handotai Co., Ltd.

  • photo: Kuniharu Nakamura

    Director

    Kuniharu Nakamura*1

    Special Adviser, SUMITOMO CORPORATION
    Outside Director

  • photo: Michael H. McGarry

    Director

    Michael H. McGarry*1

    Former Director & Chairman, Chief Executive Officer, PPG Industries, Inc.
    Director, Holcim AG
    Director, C. H. Robinson Worldwide, Inc.

  • photo: Mariko Hasegawa

    Director

    Mariko Hasegawa*1

    Former President, National University Corporation, the Graduate University for Advanced Studies, SOKENDAI
    President, Independent Administrative Agency, the Japan Arts Council

  • photo: Takashi Hibino

    Director

    Takashi Hibino*1

    Adviser, Daiwa Securities Group Inc.
    Chairman and CEO, Japan Securities Dealers Association
    Outside Director, Mitsui Fudosan Co., Ltd.

  • photo: Atsuko Oka

    Director

    Atsuko Oka*1

    Former Executive Vice President, NIPPON
    TELEGRAPH AND TELEPHONE CORPORATION
    (currently "NTT, Inc.")

    Representative Member of the Board, President and CEO, NTT TechnoCross Corporation

*1 Indicates an Outside Director as defined in Item 15, Article 2, of the Corporations Law.

The Company’s basic policy is to structure the Board of Directors in a way that facilitates accurate and swift decision-making and adequate supervision of business activities. To that end, the Company elects internal directors with specialized expertise in areas such as sales, manufacturing, and R&D, along with multiple outside directors who can actively express their opinions on growth strategies and the enhancement of governance from a broad perspective. An appropriate number of directors, regardless of nationality or gender, are appointed to the Board based on the scale of the Company’s business.

The Company has elected five outside directors, including one foreign national and two female directors, all of whom have a wealth of experience and proven track records in a wide range of industries. The expertise and areas of involvement of the directors are as follows.

Name Growth strategy Production technology/Productivity Product development Risk management Capital policy Human capital Sustainability
Fumio Akiya ● ● ● ● ● ●
Yasuhiko Saitoh ● ● ● ● ● ●
Susumu Ueno ● ● ● ● ●
Masahiko Todoroki ● ● ● ●
Kuniharu Nakamura ● ● ● ●
Michael H. McGarry ● ● ● ● ● ●
Mariko Hasegawa ● ● ●
Takashi Hibino ● ● ● ●
Atsuko Oka ● ● ● ● ●

As of June 26, 2026

Note:The above list represents the most specialized expertise of each Director and is not meant to be an exhaustive list of their knowledge and experience.
Risk management and Sustainability are areas in which the Company expects all Directors to be involved.

An overview of each area of expertise shown in the table above is as follows.

Expertise Overview
Growth strategy Skills and experience in formulating policies from a longer-term perspective for the purpose of enhancing corporate value and ensuring sustained business growth, and in executing or overseeing various measures for realizing such policies.
Production technology/Productivity Skills and experience in executing or overseeing various measures aimed at transforming production technology from the perspectives of mainly productivity improvements, safe and stable operations, and the reduction of environmental impacts.
Product development Skills and experience in executing or overseeing product development activities aimed at further strengthening competitiveness and achieving early commercialization.
Risk management Skills and experience in anticipating all kinds of risks that may arise in business activities in general, and in executing or overseeing various measures related to the prevention and mitigation of such risks.
Capital policy Skills and experience in examining and executing capital policies for making the Company’s financial base more resilient, for growth investments, and for enhancing shareholder returns, or in overseeing the execution of such policies.
Human capital Skills and experience in executing or overseeing human capital management, including securing and developing talent, building a corporate culture that embodies organizational diversity, and enhancing individual employee engagement.
Sustainability Skills and experience in executing or overseeing corporate governance, addressing global environmental issues such as climate change, and implementing activities that respect human rights, all of which form the foundation for the sustained enhancement of corporate value.

As of June 26, 2026

Audit & Supervisory Board Members

  • photo: Hidenori Onezawa

    Full-time Audit & Supervisory Board Member

    Hidenori Onezawa

  • photo: Yoshimitsu Takahashi

    Full-time Audit & Supervisory Board Member

    Yoshimitsu Takahashi

  • photo: Mitsuko Kagami

    Audit & Supervisory Board Member

    Mitsuko Kagami*2

    Lawyer, Partner Lawyer, KAGAMI Law Office

  • photo: Hiroko Kaneko

    Audit & Supervisory Board Member

    Hiroko Kaneko*2

    C.P.A., Member of the Business Accounting Council, Financial Services Agency
    Outside Director/Audit & Supervisory Committee Member, Mitsubishi HC Capital Inc.
    Outside Audit & Supervisory Board Member, Development Bank of Japan Inc.

  • photo: Shunichi Kuryu

    Audit & Supervisory Board Member

    Shunichi Kuryu*2

    Former Commissioner General, the National Police Agency

*2 Indicates an Outside Audit & Supervisory Board Member as defined in Item 16, Article 2, of the Corporations Law.