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NTT DoCoMo was incorporated in August 1991 as NTT Mobile Communications Planning Co Ltd. It was later renamed as NTT Mobile Communications Network Inc in April 1992. The company assumed its present name, NTT DoCoMo, in April 2000.
DoCoMo is Japan's leading wireless telecommunications services provider and one of the largest telephone service operators in the world as measured by total number of cellular subscribers, with an aggregate cellular subscriber base of approximately 48.82 million and an estimated domestic market share of 56.1% as of March 31, 2005. The company conducts its business together with its 94 subsidiaries and nine affiliates. The company's most significant subsidiaries are its eight regional subsidiaries, each of which operates in a region of Japan.
DoCoMo offers a range of mobile telecommunications services, including 2G (mova) and 3G (FOMA) services, Personal Handyphone System (PHS), and other specialised wireless telecommunications services, including Quickcast services (paging) and satellite mobile communications services. The company ceased accepting new subscribers for its PHS services as of April 30, 2005. The company also ceased accepting new subscribers for Quickcast services as of June 30, 2004 and announced plans to terminate the services as of March 31, 2007.
Although the company's basic services continue to be voice services, the company is increasingly focusing on the development of wireless data transmission and mobile multimedia services, such as its i-mode Internet service and its 3G services. The company introduced i-mode services in February 1999.
NTT Corporation, being the parent company of NTT DoCoMo, owned 62.99% of DoCoMo's voting rights as of March 31, 2005.
(NTT Corporation is covered in depth in a separate briefing as part of the Network Operators Worldwide (NOW) service.)
