Naigai Rubber Co., Ltd.

Naigai Rubber Co., Ltd. is a Japanese rubber products manufacturer founded in 1913. A pioneer of the rubber industry, the company quickly captured the domestic market for bicycle tires and has since expanded its product range to include tire tubes, industrial rubber goods, sports products and footwear. Its sports line includes the Blue Diamond ball series.

Headquartered with its main plant in Akashi, Hyogo Prefecture, Naigai Rubber maintains sales offices in Kobe, Tokyo, Nagoya and Fukuoka, plus an overseas manufacturing subsidiary, Naigai Gomu Philippines Corporation, in Batangas. The company emphasizes quality, ease of use and reliability built over decades, and continues to develop high value-added rubber products that meet increasingly sophisticated market and environmental demands.