Notice Regarding Merger Between Consolidated Wholly-Owned Subsidiaries

Zeon Corporation (Head Office: Chiyoda-ku, Tokyo; Representative Director and President: Tetsuya Toyoshima; hereinafter, "the Company") hereby announces that, effective July 1, 2026, an absorption-type merger will be conducted, with Zeon North Co., Ltd., a consolidated subsidiary of the Company, as the surviving company, and Zeon Yamaguchi Co., Ltd., also a consolidated subsidiary of the Company, as the absorbed company.

1. Purpose of the Merger

By integrating the two companies, which possess similar businesses in some business areas, we aim to maximize synergy effects through business integration, establish a higher quality service provision system, and pursue further business growth and new value creation centered on the engineering business.

2. Outline of the Merger

(1) Merger Method

Absorption-type merger with Zeon North as the surviving company and Zeon Yamaguchi as the absorbed company.

(2) Merger Schedule

Date of Merger Agreement: December 23, 2025 Effective Date of Merger: July 1, 2026 (planned)

3. Overview of the Merging Parties

Surviving Company

Absorbed Company

(1) Trade Name

Zeon North Co., Ltd.

Zeon Yamaguchi Co., Ltd.

(2) Head Office Location

1061-2 Yoneshima, Takaoka City, Toyama Prefecture

2-1 Nachi-cho, Shunan City, Yamaguchi Prefecture

(3) Representative

Hajime Matsuzaki, Representative Director and President

Hiroshi Kasamoto, Representative Director

(4) Capital

100 million yen (100% owned by the Company)

50 million yen (100% owned by the Company)

(5) Business Activities

Design, procurement, construction, and maintenance of various plants and aluminum melting facilities, procurement and sales of industrial chemicals, materials, equipment, and petroleum products, environmental measurement certification, work environment measurement, various analyses

Sales of sewage treatment facilities and various equipment, design, construction, and contracting of various works, environmental measurement certification, work environment measurement, various analyses, shipping and customs clearance services

4. Post-Merger Status

All rights and obligations of the absorbed company will be succeeded by the surviving company as a result of this merger.

5. Future Outlook

Since this merger is between consolidated subsidiaries of the Company, its impact on the Company's consolidated performance will be minor.