Koyo (Jtekt Corporation) was founded in 1921. Is a research and development of comprehensive function of manufacturing Japan Inc, with 6557 employees. Japan Koyo Seiko KOYOSEIKO as one of Japan's four largest bearing production group, with the production and control of the world's top equipment, have in Tokyo, Nara, hiketa, Toyohashi, Gao Song, Tokushima and Kameyama eight main production plant in Japan, (all through the ISO9001 certification) across Europe, Asia, overseas North and South America, a number of production facilities and research institutions.
The main products are: KOYO bearing rolling bearing, deep groove ball bearings, high precision bearings, self-aligning bearings, bearings, plane ball bearings, cylindrical roller bearing, linear guide bearing, ball screw bearings, miniature linear guide bearing, cross roller guide bearings, ball bearings, bushings reciprocating rotary bearing, slide group cam follower.