Tsubakimoto Chain Co. is a Japanese manufacturer of power transmission and roller chain products. It was founded in Osaka in 1917 as a bicycle chain manufacturer. Later it became the first roller chain manufacturer in Japan approved by Japanese Industrial Standards. Tsubakimoto Chain has the world's largest market share for steel chains for general industrial applications and enjoys the world's top market share for timing drive systems for automobiles. The company is headquartered in Osaka, with its main manufacturing base in Kyotanabe, Kyoto. Wikipedia