Nippon Piston Ring Co Ltd. The Group's principal activity is to manufacture automobile parts. It includes piston rings, cylinder lines (liners and sleeves), valve train parts (camshafts, valve seat inserts, valve lifters, valve rockers, valve guides) and other mechanical parts (electric appliance parts, various engine parts, synchronizer rings, couplings and metal injection molding products). The Group's operations are carried out through the following divisions: Automobile-related (engine parts for automobiles and motorcycles); Others (land-use engine parts, engine parts for ships, home appliance parts, office machine parts, industrial machinery parts). Automobile-related accounted for 86% of fiscal 2002 revenues and Others, 14%.