http://www.spk-cuspa.jp/alpinestars/

Alpinestars Inc. is a racing suit manufacturer with headquarters in Asolo, Treviso, Veneto, Italy, and headquartered in Torrance, California, USA. Sante Mazzarolo was founded in 1963. Started manufacturing ski boots and hiking boots, but soon began manufacturing motocross boots. He has also been manufacturing boots for motorcycle racing in general, including road racing boots. In the 1990s, he began manufacturing various types of protectors, racing suits, racing gloves and full leather suit jackets, establishing his current position as a comprehensive motorsport apparel manufacturer. Until 1996, they also made mountain bikes.
Japan's total importer is SPK Corporation (4 wheels)