Notice Regarding Approval for Listing of Crasus Chemical Inc. on the Tokyo Stock Exchange Standard Market

September 7, 2026

　Crasus Chemical Inc. (Representative Director and President: Hirotsugu Fukuda) hereby
announces that today, the listing of the Company’s shares of common stock on the Tokyo Stock
Exchange Standard Market has been approved by Tokyo Stock Exchange, Inc. (Securities code:
646A). The listing date on the Tokyo Stock Exchange Standard Market is scheduled for September
29, 2026, and trading of the Company’s shares of common stock on the Tokyo Stock Exchange is
expected to commence on or after that date.

　No public offering or secondary offering will be conducted in connection with this listing. The
Company’s shares will be listed through the direct listing method in the Spin-off. A reference price for trading is expected to be determined and announced on the “New Listings” page of the Japan
Exchange Group website no later than one week prior to the listing date.

　Crasus Chemical Inc. (hereafter, “the Company”) commenced operations in January 2025 following succession of the petrochemical business from Resonac Holdings Corporation and Resonac Corporation. The Company’s roots trace back to 1969, when the former Showa Denko Oita Petrochemical Complex was established. Since then, the Complex has developed alongside local communities and industry as the only petrochemical complex in the Kyushu region.

　The Crasus Chemical Group manufactures and distributes basic chemical products such as
ethylene and propylene by cracking naphtha, a petroleum-derived raw material, as well as organic
chemical products and synthetic resin products mainly made from these basic chemical products and acetic acid. These products are used in wide range of everyday applications, including automobiles, home appliances, clothing, coatings, and food packaging.

　In line with its Purpose, “Chemistry for Tomorrow,” Crasus Chemical Group aims to become a
next-generation petrochemical company that leads the realization of a carbon-neutral and circular
economy, thereby contributing to the sustainable development of society.

　For details regarding the approval for listing, please refer to the “New Listings” page of the Japan Exchange Group website.

“New Listings” page of the Japan Exchange Group website:
https://www.jpx.co.jp/english/listing/stocks/new/index.html
Website of Crasus Chemical Inc.:
https://www.crasus.co.jp/en
Consolidated Financial Forecast for the Fiscal Year Ending December 31, 2026
https://www.crasus.co.jp/en/news/2026/11.html

We sincerely appreciate the kind congratulations and expressions of goodwill from many stakeholders. However, we are unable to accept any gifts, such as floral arrangements, or any other congratulatory offering. We ask for your understanding and thank you for your consideration.

This document is a press release intended solely for public disclosure and has not been prepared for the purpose of soliciting investments or engaging in any similar activities, whether in Japan or overseas. Securities may not be offered or sold in the United States unless they are registered under the U.S. Securities Act of 1933 or an exemption from registration is available. The Company does not intend to register any securities in the United States in connection with this matter.

• For further information, contact
• General Affairs Group, General Affairs & Human Resources Department
  E-mail: CSC_PR@crasus.co.jp