Daicel Corporation, Polyplastics Co., Ltd.

As announced on October 16, 2025, in “Polyplastics to split under Daicel Group’s reorganization plan,” Daicel Corporation (Head office: Kita-ku, Osaka; President and CEO: Yasuhiro Sakaki; hereinafter “Daicel”) has resolved to succeed to the entire business of Polyplastics Co., Ltd. (Head office: Minato-ku, Tokyo; President and CEO: Takashi Miyamoto; hereinafter “Polyplastics”) excluding the business of holding and administering shares of its subsidiaries and affiliates (hereinafter “Polyplastics Group subsidiaries”) through an absorption-type company split effective April 1, 2026.

Under this split, Polyplastics (Japanese entity) will be divided into (1) the engineering plastics business (including incidental businesses; hereinafter “the Target Business”) and (2) the business of holding and administering shares of Polyplastics Group subsidiaries.

Daicel will comprehensively succeed to the Target Business and operate it as the “High Performance Polymers SBU.”

Following the split, Polyplastics will remain as a shareholding company managing Polyplastics Group subsidiaries. At the same time, it has been resolved to change its corporate name to HPP Holdings Co., Ltd., effective April 1, 2026. In line with this change, the names of Polyplastics Group subsidiaries in Japan and overseas will also be sequentially updated to include the High Performance Polymers (HPP) designation, with April 1, 2026, as the target date.

This split is based on the concept of creating a “New Daicel.” By integrating Polyplastics’ engineering plastics business into Daicel, we aim to maximize corporate value through:
Sharing know-how in technical services and solutions, Polyplastics’ area of strength
Strengthening closer coordination with Daicel’s Safety SBU and Materials SBU
Leveraging talent for the growth of the entire Daicel Group
Improving efficiency of corporate functions

The supply of products and services in the engineering plastics business will continue under Daicel, maintaining and enhancing quality and content, while striving to deliver even greater value to all stakeholders. We sincerely appreciate your continued and unwavering support.

For inquiries regarding this release, please contact:
Corporate Communication Team, Corporate Communication Division, Corporate Support Headquarters
Daicel Corporation
TEL: +81 3 6711 8121

General Administration Department, Corporate Support Division,
Polyplastics Co., Ltd.
TEL: +81 3 6711 8614