Sumitomo Riko Co. Ltd. (住友理工株式会社 Sumitomo Rikō Kabushiki-gaisha) is a Japanese company which produces rubber and other synthetic resin products. In June 2014, the company changed its corporate name from Tokai Rubber Industries to Sumitomo Riko to clarify that it is a part of the Sumitomo Group. Through its subsidiaries in 24 countries, the company claims to hold the largest market share of automotive anti-vibration products. Automotive products account for nearly 80 per cent of sales.