SoftBank Corp. (ソフトバンク株式会社 Sofutobanku Kabushiki-gaisha?) is a Japanese telecommunications and Internet corporation, with operations in broadband, fixed-line telecommunications, e-commerce, Internet, broadmedia, technology services, finance, media and marketing, and other businesses.
SoftBank was established in Tokyo, Japan on September 3, 1981, and had a market capitalization of approximately US$43.52 billion at March 2011.
SoftBank's corporate profile includes various other companies such as Japanese broadband company SoftBank BB, data center company IDC Frontier, gaming company GungHo Online Entertainment, and the publishing company SoftBank Creative. Additionally, it has various partnerships in Japanese subsidiaries of foreign companies such as Yahoo!, E-Trade, Ustream.tv, EF Education First and Morningstar. SBI Group is a Japanese financial services company that began in 1999 as a branch of SoftBank.
SoftBank was the only official carrier of the iPhone in Japan until the release of iPhone 4S when it became available on au by KDDI as well.
On October 14, 2012, it announced that it will acquire 70 percent of the U.S. telecommunications company Sprint Nextel Corporation (now Sprint Corporation) (NYSE: S) for $20.1 billion. The deal officially was approved by the FCC on July 5, 2013 for $21.6 billion of 78 percent shares which $5 billion of it is for the capital. On August 6, 2013, SoftBank enacted a transaction that purchased approximately 2 percent more shares of Sprint Corporation which now has SoftBank having an 80 percent stake in Sprint Corporation.
A SoftBank marketing campaign, beginning in June 2007, featuring a dog named "Otosan" who acts as patriarch for a human family known as the "Shiratos", has been one of Japan's most successful ad campaigns during that time.

Type:    Public
Traded as:    TYO: 9984, OTC Pink: SFTBF
Industry:    Telecommunications
Founded:    September 3, 1981
Headquarters:    Tokyo, Japan
Key people:    Masayoshi Son (Chairman & CEO)
Products:    Fixed line and mobile telephony, Internet services, digital television
Revenue:    Increase ¥3.202 trillion (2012)
Operating income:    Increase ¥625.3 billion (2012)
Net income:    Increase ¥313.7 billion (2012)
Total assets:    Increase ¥4.899 trillion (2012)
Total equity:    Increase ¥937.5 billion (2012)
Employees:    62,710 (2012)
Subsidiaries:    SoftBank Mobile, SoftBank Telecom, SoftBank Creative, SoftBank BB, Sprint Corporation, (80% as of August 6, 2013), Yahoo! Japan (~35%), GungHo Online Entertainment (58.5%)
Website:    www.softbank.co.jp