J-Star Holding Co Ltd is engaged in the research, development, and manufacturing of carbon fiber for a wide variety-of-products including carbon bicycles, carbon rackets, automotive parts, outdoor sports gears, and healthcare products. The company has five segments: Bicycle frame, Racket, Crank, Service provision, and Others. The majority of its revenue is generated from the Bicycle frame segment. Geographically, the company operates in Taiwan, China, and other regions.