Sumitomo Rubber Industries, Ltd., doing business as Dunlop, is a global tire and rubber company based in Japan. It is part of the Sumitomo Group. The company makes a wide range of rubber based products, including automobile tires, golf balls, and tennis balls. Sumitomo tire brands include Dunlop and Falken. Sumitomo also manufactures and sells sport equipment under the Dunlop Sport, Srixon, and Cleveland Golf brands. Wikipedia