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is the predominant mobile phone operator in Japan. The name is officially an abbreviation of the phrase, "''do communications over the mobile network''", and is also from a compound word ''dokomo'', meaning "everywhere" in Japanese. Docomo provides phone, video phone (FOMA and Some PHS), i-mode (internet), and mail (i-mode mail, Short Mail, and SMS) services. The company has its headquarters in the Sanno Park Tower, Nagatachō, Chiyoda, Tokyo.〔"(Headquarters Location )." NTT Docomo. Retrieved on March 7, 2010.〕 At the beginning of 2015, it was the fourth largest public company in Japan when measured by market capitalization.〔(【引用サイトリンク】title=Historical market caps of the largest Japanese companies )〕 Docomo was spun off from Nippon Telegraph and Telephone (NTT) in August 1991 to take over the mobile cellular operations. It provides 2G (mova) PDC cellular services on the 800 MHz band, and 3G FOMA W-CDMA services on the 2 GHz (UMTS2100) and 800 MHz (UMTS800 (Band VI)) and 1700 MHz (UMTS1700 (Band IX)) bands, and 4G LTE services. Its businesses also included PHS (Paldio), paging, and satellite. Docomo ceased offering a PHS service on January 7, 2008. == Customers == NTT Docomo is a subsidiary of Japan's incumbent telephone operator NTT. The majority of NTT Docomo's shares are owned by NTT (which is 33.71% government-owned). While some NTT shares are publicly traded, control of the company by Japanese interests (Government and civilian) is guaranteed by the number of shares available to buyers. It provides wireless voice and data communications to subscribers in Japan. NTT Docomo is the creator of W-CDMA technology as well as mobile i-mode service. In late 1995, Docomo CEO hired Price Waterhouse consulting firm for strategy development and at that time the Chief Visionary Technologist Keyur Patel worked on the first design of data services on mobile for NTT Docomo CEO. NTT Docomo has more than 53 million customers (as of March 2008), which is more than half of Japan's cellular market. The company provides a wide variety of mobile multimedia services. These include i-mode which provides e-mail and internet access to over 50 million subscribers, FOMA, which was launched in 2001 as the world's first 3G mobile service based on W-CDMA, Xi, a 4G LTE mobile service which was launched on December 24, 2010, and Premium 4G, a LTE Advanced service which was launched on March 27, 2015. In addition to wholly owned subsidiaries in Europe and North America, the company is expanding its global reach through strategic alliances with mobile and multimedia service providers in Asia-Pacific and Europe. NTT Docomo is listed on the Tokyo (9437), London (NDCM), and New York (DCM) stock exchanges. On April 19, 2008, it was announced that Ryuji Yamada, the current co-president of NTT Docomo, will be promoted as the president of NTT Docomo in June 2008. Masao Nakamura will stay in NTT Docomo as a director and also the senior adviser. Since October 2006, when the introduction to the service which allows the user to carry their original phone number with a new provider was made, NTT Docomo has lost many users to KDDI and SoftBank. This promotion was made in order to get more users for NTT Docomo. The company was the last major global mobile carrier to offer Apple's iPhone, which it finally did with the release of the iPhone 5s and 5c. This has been cited as one of the reasons for the steady stream of its customers switching for competing networks.〔(【引用サイトリンク】title=Japan's DoCoMo holds out to iPhone mania, but at what cost? )〕 In June 2011, the company announced that they were teaming up with McAfee to provide McAfee VirusScan Mobile for its Android mobile users. In July 2012, NTT Docomo acquired Italy's Buongiorno in a deal worth 209 million euros.〔(【引用サイトリンク】title=NTT Docomo acquires Italy's Buongiorno )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「NTT DoCoMo」の詳細全文を読む スポンサード リンク
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