SoftBank Group Corp. (ソフトバンクグループ株式会社,Sofutobanku Gurūpu Kabushiki-gaisha)  is a Japanese multinational conglomerate holding company headquartered in Tokyo, Japan. The company wholly owns Softbank Corp., Softbank Vision Fund, Arm Holdings, Fortress Investment Group, Boston Dynamics, and also owns stakes in Sprint (ca.85%), Alibaba (29.5%), Yahoo Japan (42%), Bright Star (87.1%), Uber (15%), Didi Chuxing (ca.20%), Ola (ca.30%), Grab (ca.60%), Renren (42.9%), InMobi (45%), Hike (25.8%), Snapdeal (ca.30%), Brain, Fanatics (ca.22%), Flipkart (ca.20%), Guardant Health, Improbable Worlds (ca.50%), Mapbox, Nauto, Nvidia (ca.5%), One97 Communications (ca.20%), Oravel Stays (42%), OSIsoft, PingAn Heath Cloud (7.41%), Plenty United, Roviant Sciences, Slack Technologies (ca.5%), Vir Biotechnology, WeWork (ca.22%), Zhongan Online P&C Insurance (5%), Compass (ca.22%), Auto1 (ca.20%), Wag (45%), Kattera (ca.28%).
The company is known for its vision and leadership by founder Masayoshi Son.  It now owns operations in broadband; fixed-line telecommunications; e-commerce; internet; technology services; finance; media and marketing; semiconductor design; and other businesses.
Founding and early years
In 2000, SoftBank made its most successful investment ever – $20 million to a then fledgling Chinese Internet venture Alibaba.  This investment turned into $60 billion when Alibaba went public in September 2014.  
On January 28, 2005, SoftBank became the owner of the Fukuoka SoftBank Hawks, a Nippon Professional Baseball team. On March 17, 2006, SoftBank announced its agreement to buy Vodafone Japan, giving it a stake in Japan's $78 billion mobile market. In April 2006, they bought a 23% stake of Betfair, an Internet betting exchange. In August 2006, SoftBank sold all its shares of SBI Group to a subsidiary of SBI's holding company, making SBI independent. On October 1, 2006, Vodafone Japan changed its corporate name, mobile phone brand name, and its mobile phone domain name to SoftBank Mobile, SoftBank, and [mb.softbank.jp], respectively. 
On January 28, 2008, it was announced that SoftBank and Tiffany & Co. collaborated in making a limited 10 model-only cellphone. This cellphone contains more than 400 platinum diamonds, totaling more than 20 carats. The cost is said to be more than 100,000,000 yen. 
On October 3, 2012, the take over of competitor eAccess was announced, and was completed in January 2013.  On July 1, 2013, SoftBank announced that Willcom became a wholly owned subsidiary effective July 1, 2013, after termination of rehabilitation proceedings. eAccess was merged with Willcom, which resulted in a new subsidiary and brand from Yahoo! Japan, Ymobile Corporation.
On October 15, 2012, SoftBank announced plans to take control of American Sprint Nextel by purchasing a 70% stake for $20 billion.  On July 6, 2013, the United States Federal Communications Commission approved SoftBank’s acquisition of the Sprint Corporation for $22.2 billion for a 78% ownership interest in Sprint. The acquisition involved payment of $17.2 billion in cash to Sprint shareholders, with the balance $5 billion as capital contribution. The transaction was financed by way of cash and a bridge loan from a consortium of banks.  On August 6, 2013, SoftBank bought 2% more shares of Sprint Corporation, increasing its ownership stake in the company to 80%.
In October 2013, SoftBank acquired 51% stake in Supercell for a reported $2.1 billion. Later on October 25, 2014, they invested $210 million in OlaCabs,  $627 million in Snapdeal with 30% stake in the company on October 28, 2014, and a $100 million investment in Housing.com with 30% stake in the company in November 2014. 
In 2015, SoftBank acquired DramaFever.  In May 2015, Masayoshi Son said he would appoint Nikesh Arora, a former Google executive, as Representative Director and President of SoftBank. Arora has been heading SoftBank's investment arm.  On June 1, 2015, SoftBank acquired additional 22.7% stake in Supercell, increasing its total stake to 73.2% and becoming the sole external shareholder of the company. In June 2015, SoftBank announced it would invest US$1 billion in the Korean e-commerce website Coupang as part of its overseas expansion plans. 
In July 2015, SoftBank announced the renaming of the company from SoftBank Corp. to SoftBank Group Corp. Meanwhile, SoftBank Mobile was renamed to SoftBank Corp., the now former name of the company as a whole.  On February 16, 2016, SoftBank announced they would repurchase a record 14.2% of shares, valued at $4.4bn, in order to boost investor confidence.  On March 31, 2016, they announced they would sell shares worth $7.9 billion of their stake in Alibaba Group. On June 21, 2016, SoftBank sold its 84% stake in Supercell for reported US$7.3 billion to Tencent.  On June 3, 2016, Softbank agreed to sell most of its stake in GungHo Online Entertainment (approximately 23.47%) for about $685 million, which would thus end Softbank's majority ownership of the company, resulting in Gungho no longer being an associate of Softbank.    The offer was accepted by Gungho and completed by June 22, thus allowing Gungho to become an independent company.  
In June 2016, Nikesh Arora stepped down as president of SoftBank amidst pressure from investors. Board member Ron Fisher and Baer Capital Partners founder Alok Sama stepped in to manage Arora's overseas investment duties.  Just a month later, Son announced the company's largest deal ever to buy British chip designer ARM Holdings for more than US$32 billion.   This acquisition was completed on September 5, 2016. 
On December 6, 2016, after meeting with US President-elect Donald Trump, chief executive Masayoshi Son announced SoftBank will be investing US$50 billion in the United States toward businesses creating 50,000 new US jobs.   
On January 30, 2017, the Wall Street Journal wrote that SoftBank Group was "weighing an investment of well over $1 billion in shared-office space company WeWork Cos., in what could be among the first deals from its new $100 billion technology fund."  On March 20th SoftBank bought a $300m stake in WeWork.  On February 14, 2017, SoftBank Group agreed to buy Fortress Investment Group LLC for $3.3 billion. In February 2017, it was announced that Social Finance Inc. was close to raising $500 million from an investor group led by Silver Lake, and also including Softbank.  On March 28, 2017, the Wall Street Journal reported that SoftBank Group Corporation had approached Didi Chuxing Technology Co. about investing $6 billion to help the ride-hailing firm expand in self-driving car technologies," with the bulk of the money to come from SoftBank's planned $100 billion Vision Fund. 
On May 18, 2017, it was reported that Softbank had completed its single largest investment in India to date, investing $1.4 billion in Paytm. At the time, Softbank was also working on a takeover of Flipkart's Snapdeal.  On August 10, 2017, Softbank invested $2.5 billion into Flipkart.
On 8 June 2017, Alphabet Inc. announced the sale of Boston Dynamics to Japan's SoftBank Group for an undisclosed sum.
On November 14, 2017, Softbank finally agreed to invest $10 billion into Uber.  On December 29, 2017, it was reported that SoftBank-led consortium of investors had secured a $9 billion investment into Uber. The deal, to close in January 2018, will leave SoftBank as Uber's biggest shareholder, with a 15 percent stake.  The deal was secured after Uber shareholders voted to "sell their shares to the Japanese conglomerate at a discounted price." Beyond SoftBank, consortium members included Dragoneer, Tencent, TPG and Sequoia. 
On 14 January 2018, Softbank's Vision Fund announced to invest $560 million in the German used-car sales portal Auto1. 
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 SB Creative. SBI Group is a Japanese financial services company that began in 1999, as a branch of SoftBank.  Ymobile Corporation is another telecommunications subsidiary of SoftBank, established in 2014. In 2010, SoftBank founded Wireless City Planning (WCP), a subsidiary that will see the development of TD-LTE networks throughout Japan.  SoftBank also operate SoftBank Capital, a US-based venture capital company. The COMDEX expo in the US was owned by SoftBank from 1995 to 2001. Since 2005, SoftBank also owns the Fukuoka SoftBank Hawks professional baseball team. SoftBank also operates in the eco-power industry through its SB Energy subsidiary.
Additionally, it has various partnerships in Japanese subsidiaries of foreign companies such as Yahoo! (which has resulted in Yahoo! Japan), E-Trade, Ustream.tv, EF Education First and Morningstar. It also has stakes in Alibaba Group and Sprint Corporation. 
SoftBank Corp. (ソフトバンク株式会社,Sofutobanku Kabushikigaisha) is SoftBank's telecommunications subsidiary, providing both mobile and fixed-line services. It was previously called SoftBank Mobile until July 2015, with the Group's merger of SoftBank BB Corp., SoftBank Telecom Corp. and Ymobile Corporation to reflect its new status of providing fixed-line and ISP operations. 
The company was founded in 1981, as the mobile phone division of Japan Telecom under the name Digital Phone (デジタルホン). J-PHONE Co., Ltd. (J-フォン) was formed in 1999, by the merging of Digital Phone Group (DPG, three local companies) and Digital TU-KA Group (DTG, six local companies, not to be confused with TU-KA). Japan Telecom owned a stake of 45.1%.
J-PHONE grew steadily for a decade by continuously introducing new services and enhancements such as SkyWalker for PDC, SkyMelody ringtone download, the famous Sha-Mail picture mail introduced on the basis of camera phones developed by SHARP, the mobile multimedia data service J-Sky modeled after NTT DoCoMo's i-mode, and advanced Java services based on JSCL, modeled after NTT DoCoMo's DoJa based i-appli.
In October 2001, the British mobile phone group Vodafone increased its share to 66.7% of Japan Telecom and 69.7% of J-Phone. On October 1, 2003, the name of the company and the service brand was officially changed to Vodafone, with the division called Vodafone K.K. or Vodafone Japan. The growth and success of the company during this period is due in large part to then president Bill Morrow. 
However, in January 2005, Vodafone Japan lost 58,700 customers and in February 2005 lost 53,200 customers, while competitors NTT DoCoMo gained 184,400 customers, au by KDDI gained 163,700, and Willcom gained 35,000. While as of February 2005, DoCoMo's FOMA 3G service had attracted 10 million subscribers and KDDI's 3G service had attracted over 17 million subscribers, Vodafone's 3G service only attracted 527,300 subscribers. Vodafone 3G failed to attract subscribers because Vodafone cut back investments in 3G services in Japan in 2002/3; handsets did not fully match needs and preferences of Japanese customers. At the end of February 2005, Vodafone Japan had 15.1 million customers, and by end of October 2005, the number of subscribers had fallen by 103,100 to 14.996 million, while during the same period NTT DoCoMo had gained 1.65 million customers and KDDI/AU had gained 1.82 million customers. At the end of October 2005, NTT DoCoMo had 17.6 million 3G customers, KDDI/AU had 19.8 million 3G customers, and Vodafone-Japan had 1.9 million 3G customers, i.e. Vodafone-Japan gained about 4.8% of Japan's 3G market.
Vodafone changed the name of its multimedia data services from J-Sky to Vodafone live!, and used J-Sky's principles and technologies and business models to introduce the WAP -based Vodafone live! in Vodafone's other markets. Thus Vodafone live! has its origin in J-Phone's J-Sky. At the end of February 2005, Vodafone live! had 12.907 million subscribers in Japan. By end of October 2005 the number of Vodafone live! subscribers had fallen by 138,000 to 12,769,600.
In March 2006, Vodafone began discussing the sale of the Vodafone Japan unit to SoftBank. Vodafone was unable to satisfy customers, as Japanese users tend to have preferences not seen in other markets. Handsets had user interfaces that differed too much from the Japanese interface, and did not have as many features as competing companies. This led to the loss of more customers and Vodafone's decision that the market was no longer profitable.
On March 17, 2006, Vodafone Group announced it had agreed to sell its holding of Vodafone Japan (Vodafone K.K.) to SoftBank for about 1.75 trillion Japanese yen (approximately US$15.1 billion). On April 14, 2006, SoftBank and Vodafone K. K. jointly announced, that the name of the company will be changed to a "new, easy-to-understand and familiar" company name and brand. It was announced in a press conference on May 18, 2006, that the new name would be "SoftBank Mobile Corp.", effective October 1, 2006. SoftBank started the rebranding around June 14, 2006.
On June 4, 2008, SoftBank Mobile announced partnership with Apple and brought the iPhone (3G) to Japan later in 2008.  SoftBank Mobile was the only official carrier of the iPhone in Japan until the release of iPhone 4S in 2011 when it became available on au by KDDI as well. 
SoftBank Corp.'s mobile network operates W-CDMA (UMTS 3G) network ("SoftBank 3G"). SoftBank's 3G network is compatible with UMTS and supports transparent global roaming for existing UMTS subscribers from other countries. SoftBank 4G uses TD-LTE / LTE. SoftBank offers 4G speeds of more than 110 Mbit/s. SoftBank Wi-Fi Spots are available almost everywhere in Japan.
- 1984-10: JAPAN TELECOM was founded.
- 1986-08: JAPAN TELECOM launches leased circuit services.
- 1986-12: RAILWAY TELECOMMUNICATION established.
- 1989-05: RAILWAY TELECOMMUNICATION merges with JAPAN TELECOM.
- 1991-07: Tokyo Digital Phone established.
- 1994-04: J-Phone starts PDC cellular service in the 1.5 GHz band, 10 MHz bandwidth.
- 1997-11: J-Phone launches SkyWalker SMS service designed by Aldiscon and Ericsson for PDC
- 1998-11: J-Phone launches SkyMelody ringtone download service
- 1999-12: J-Phone launches J-Sky wireless Internet service ten months after NTT DoCoMo's i-mode, which was launched in February 1999.
- 2000-11: J-Phone launches Sha-Mail (写メール) picture messaging service using the world's first camera phones developed by SHARP
- 2001-06: J-Phone launches Java service with JSCL library
- 2002-12: J-Phone launches W-CDMA 3G service for the first time
- 2002-08: Company name was changed to JAPAN TELECOM HOLDINGS.The fixed-line telecommunications business was also separated to found a new JAPAN TELECOM.
- 2003-10: J-Phone company name is changed to Vodafone K.K., and J-Sky name is changed to Vodafone live!. Vodafone launches a Japan-nationwide Beckham campaign
- 2003-12: Company name was changed to Vodafone Holdings K.K.
- 2004-10: Vodafone K.K. merges with Vodafone Holdings K.K. and company name is changed to Vodafone K.K.
- 2004-10: Vodafone relaunches the 3G services in Japan a second time offering mobile phone handsets designed primarily for the European markets
- 2005 summer: Vodafone changes management and relaunches 3G services in Japan a third time
- 2006-03-17: Vodafone officially announced it had agreed to sell Vodafone Japan (Vodafone KK) to SoftBank for a total of 1.75 trillion Japanese yen (approx US$15.1 billion) in one of the largest M&A transactions in Japan to date
- 2006-04-14: SoftBank and Vodafone K. K. jointly announced, that the name of the company will be changed to a "new, easy-to-understand and familiar" company name and brand. Masayoshi Son became CEO and Representative Director of Vodafone K. K.
- 2006-05-01: Headquarters moved from Atago Hills to Shiodome to integrate operations with other SoftBank group companies.
- 2006-05-18: SoftBank announced that the name of the company will be changed to "SoftBank Mobile Corp." effective October 1, 2006
- 2006-06-16: SoftBank started rebranding "Vodafone" to "SoftBank."
- 2006-10-01: Vodafone Japan company name is changed to "SoftBank Mobile Corp."
- 2008-06-02: SoftBank Mobile releases iPhone in Japan beating NTT DoCoMo.
- 2008-12-09: SoftBank Mobile joins Open Handset Alliance. 
- 2009-05-15: SoftBank Mobile joins TransferJet Consortium.
- 2010: Softbank purchased 100% of the PHS mobile operator Willcom.
- 2012-05-29: SoftBank Mobile unveils the Pantone 5 107SH, a mobile phone with a built-in geiger counter. 
Since May 2006, SoftBank's marketing and commercials have principally revolved around "Otosan sujan karki", the canine patriarch of the otherwise human "Shirason, "Kaito" family.  "Otosan" translates to father, and the character, a Hokkaido dog, indeed acts as the father of the family, along with the son "Kojiro" (starred by Dante Carver), mom "Masako" (Kanako Higuchi), and daughter "Aya" (Aya Ueto).  The advertising series proved to be highly popular: CM Research Center ranked the Otousan adverts as the most popular in Japan between 2007 and 2012, based on monthly surveys of 3,000 randomly selected adults in Japan.  
Softbank was sold a "team" for the America`s Cup. The team was named SoftBank Team Japan, and Yanmar came onboard. SoftBank Team Japan raced in the 2017 races held in Bermuda. The team-members come from various backgrounds, most of whom are not Japanese. 
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