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Telecommunications

11, 01. 2004
Companies
Cell phone carriers
NTT DoCoMo
Leading telecommunication company of NTT group. It maintains overwhelming market share of 60% in mobile phones, maintaining strong brand name.
http://www.nttdocomo.co.jp/english/ (English)
http://www.nttdocomo.com/ (Global)
KDDI
The company with the 2nd largest market share in mobile phone business (known as its brand name au). Taking over another telecommunications company TU-KA Cellular Tokyo and two other related companies in 2005.
http://www.kddi.com/english/
http://www.au.kddi.com/english/index.html (au website)
WILLCOM
Major PHS (Personal Handy-phone System) operator in Japan, with 3.65 million subscribers (as of Dec. 2005). Launched industry's first fixed-rate voice service in May 2005.
http://www.willcom-inc.com/en/
Home/Office phone carriers
NIPPON TELEGRAPH AND TELEPHONE (NTT)
Japan's telecommunication giant. The largest share of regional telecommunication service, which is divided into two companies: NTT East and NTT West.
http://www.ntt.co.jp/index_e.html (NTT Group)
http://www.ntt-east.co.jp/index_e.html (NTT East)
http://www.ntt-west.co.jp/index_e2.html(NTT West)
KDDI
The second largest carrier next to NTT.
http://www.kddi.com/english/
SOFTBANK
The company that acquired JAPAN TELECOM in 2004.
http://www.softbank.co.jp/en/index.html
http://www.japan-telecom.co.jp/english/ (JAPAN TELECOM website)
The competent authorities
Ministry of Internal Affairs and Communications (MIC)
The ministry offers information on telecommunication policies, applicable laws and statistics.
http://www.soumu.go.jp/english/
Telecommunications industry organizations
Telecommunications Carriers Association (TCA)
TCA offers database on the industry, including the number of subscribers to mobile phone services. It also publishes annual reports of the industry.
http://www.tca.or.jp/index-e.html
National Institute of Information and Communications Technology (NICT)
The organization offers data obtained from ionosphere sounding and solar observations. Public institution to determine the standard values for time and frequency.
http://www.nict.go.jp/overview/
Communications and Information network Association of Japan (CIAJ)
Policy recommendations and statistics on the industry are available on the website.
http://www.ciaj.or.jp/e.htm
Research Institute of Telecommunications and Economics (RITE)
The institute conducts researches in telecommunications, postal services, logistics and financial services.
http://www.rite-i.or.jp/english/

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