Tranche Update on NPR-Riken Corporation's Equity Buyback Plan announced on May 15, 2024.

NPR-Riken Corp is a Japan-based company engaged in the management and administration of its subsidiaries and group companies, as well as other businesses incidental or related to such management and administration. The Company conducts its business through subsidiaries such as RIKEN and Nihon Piston Ring. The Riken Group is mainly engaged in the manufacture and sale of automotive and industrial machinery parts, anechoic chambers, industrial furnaces and heating materials, construction-related parts, construction contracting, environmental maintenance, and factory repair and maintenance. Nippon Piston Ring Group is mainly engaged in the manufacture and sale of automotive-related products, marine and other products, as well as logistics, services, and other business activities related to each business.