Notice Concerning Changes of Directors and Officers

Tokyo, Japan—The Board of Directors of Tosoh Corporation passed a resolution concerning the changes of directors and officers of the company, as detailed below, at the Board of Directors meeting on May 13, 2024.

1. Changes of directors and auditors (effective June 21, 2024)

    (1) New candidate for external director
            External director of Nissha Co., Ltd.            Yukiko Hashitera
            Representative director and president of Phoenixi Co., Ltd.

    (2) Retiring external director

             External director                                          Tsutomu Abe

2. Changes of officers (effective May 13, 2024)

     (1) New vice presidents

           Tetsuro Hachimura
           Yoshiyuki Shigeoka
           Masato Tani
           Keiji Sako
           Yoshiro Shibasaki
           Kunihiko Nakayama

3. Changes of officers (effective June 21, 2024)

     (1) New candidates for vice presidents

           Kiyofumi Fukuda
           Kazutoyo Kawahara
           Akira Hashimoto
           Seiji Matsumoto

     (2) Retiring vice presidents

           Senior vice president                         Hidetoshi Horiuchi
           Senior vice president                         Mitsutaka Sugata
           Vice president                                    Masaki Nomura
           Vice president                                    Tetsuro Hachimura
           Vice president                                    Yoshiyuki Shigeoka
           Vice president                                    Masato Tani
           Vice president                                    Keiji Sako
           Vice president                                    Yoshiro Shibasaki
           Vice president                                    Kunihiko Nakayama

Additionally, Mitsutaka Sugata is scheduled to take on the role of director and president at Tosoh Silica Corporation in mid-June.
Yoshiyuki Shigeoka is scheduled to take on the role of director and executive vice president at Asia Industry Co., Ltd. in mid-June.
Masato Tani is scheduled to take on the role of executive director at Taiyo Vinyl Corporation in mid-June.
Yoshiro Shibasaki is scheduled to take on the role of director and president at Tosoh Hyuga Corporation in mid-June.
Kunihiko Nakayama is scheduled to take on the role of director and president at Seiwakouki Co., Ltd. in mid-June.

    (3) Candidate officers to be promoted

       (1 Candidate for senior executive vice president

            Executive vice president                Toru Adachi

       (2 Candidate for senior vice president

            Vice president                                Sousuke Matsushima


Who We Are

Tosoh Corporation is the parent of the Tosoh Group, which comprises over 100 companies worldwide and a multiethnic workforce of over 14,000 people. It generated net sales of ¥1005.6 billion (US$7.0billion at the average rate of ¥144.6 to the US dollar) in fiscal 2024, ended March 31, 2024.

What We Do

Tosoh is one of the largest chlor-alkali manufacturers in Asia. The company supplies the plastic resins and an array of the basic chemicals that support modern life. Tosoh’s petrochemical operations supply ethylene, polyethylene, and functional polymers, while its advanced materials business serves the global semiconductor, display, and solar industries. Tosoh has also pioneered sophisticated bioscience systems that are used for the monitoring of life-threatening diseases. In addition, Tosoh demonstrates its commitment to a sustainable future in part by manufacturing a variety of eco-products.

Stock Exchange Ticker Symbol: 4042


This document may contain forward-looking statements, including, without limitation, statements concerning product development, objectives, goals, and commercial introductions, which involve certain risks and uncertainties. Forward-looking statements are identified through the use of the word anticipates and other words of similar meaning. Actual results may differ significantly from the results expressed in forward-looking statements.

For more information, please contact


Lisa Lee
International Public Relations
Tosoh Corporation 

[email protected]
Tel: +81 3 5427 5118
Fax: +81 3 5427 5198