Nippon Piston Ring. 

Nippon Piston Ring Co., Ltd. produces and sells automobile engine parts, marine engine parts, and other products in Japan and internationally. The company offers automobile products, including piston rings for motorcar, motorcycle, and other internal combustion engine use valve seat inserts; other automobile engine parts, including composite camshafts, cylinder liners, alloy cast iron, and camshafts. It also provides marine and industrial piston rings; and industrial large size piston rings and metal injection molding parts for industrial equipment, office automation equipment, and leisure goods. In addition, the company offers compressor parts; and medical equipment parts, such as dental implants. Nippon Piston Ring Co., Ltd. was founded in 1931 and is headquartered in Saitama, Japan.