SoftBank Group Corp. is a holding company that engages in the management of its group companies which provides information technology and telecommunication services. It operates through the following segments: Mobile Communications, Sprint, Fixed-line Telecommunications, Internet, and Others. The Mobile Communications segment provides mobile communications services in Japan; distributes and sells mobile devices and accessories, and IT related products; and produces and distributes online games. The Sprint segment offers mobile communications and fixed-line telecommunications services and sells mobile devices and accessories in the United States. The Fixed-line Telecommunications segment covers the fixed-line telephone services and data transmission dedicated line services. The Internet segment includes an internet advertising business, e-commerce business, and membership services. The other segment handles business-related to Fukuoka Softbank Hawks baseball team. The company was founded on September 3, 1981 and is headquartered in Tokyo, Japan.
Their official website can be found here.