NPR-RIKEN Corporation

Engine Components, Precision Parts & Industrial Equipment · Chiyoda, Tokyo

NPR-RIKEN, established in October 2023, manufactures piston rings for engines used in cars, motorcycles, trucks, construction and agricultural equipment, generators and ships. Rings seal combustion gases, control oil consumption and transfer heat. Other engine products include cylinder liners, valve-seat inserts, camshafts, valve lifters and turbocharger seal rings.

Its precision-parts range includes resin seal rings and gears, metal injection-molded products and cast suspension and steering components. Piping products support water, gas and air-conditioning systems. Other businesses supply industrial furnaces and heater units, alongside anechoic chambers and related facilities for electromagnetic compatibility testing.