ball and roller bearings - NTN Bearing Corporation of - Yum
6. HISTORY. 1918 Began research and manufacture of ball bearings. at Nishizono Ironworks (Uchibori, Kuwana-cho, Kuwanagun, Mie Pref.) 1923 Nishizono Ironworks and Tomoe Trading Co. (Nishiku,. Osaka) inaugurated joint manufacture and sale of. bearings under the brand name NTN.. 1927 NTN Mfg. Co., Ltd. established with capital of ~50, 000.