NPR-Riken Corporation manufactures and sells automobile and marine engine parts and other products in Japan and internationally. It operates through the Automotive & Industrial Machinery Parts Business and Plumbing & Construction Equipment Business segments. Its products include piston rings, camshafts, valve seat inserts, cylinder liners, casting parts, seal rings, piping products, metal injection molding products, thermal engineering products, electromagnetic compatibility products, medical equipment, and exterior parts for recreational vehicles and infrastructure. Incorporated in 2023, the company is headquartered in Tokyo, Japan, and operates as a subsidiary of Npr-Riken Corporation.