Nippon Telegraph and Telephone

Japan Telegraph and Telephone Corporation

NTT Headquarters

Native name

| 日本電信電話株式会社
Type| Public KK

Traded as

| TYO: 9432
OTC Pink: NTTYY
LSE: [Script error: No such module "Stock tickers/LSE". NPN]
TOPIX Core 30 Component
Industry| Telecommunications
Founded| August 1, 1952 (1952-08-01) (as government monopoly)
April 1, 1985 (1985-04-01) (Private Company)
Headquarters| Ōtemachi, Chiyoda, Tokyo, Japan

Key people

| Satoshi Miura
(Chairman)
Jun Sawada
(President and CEO)
Products|

* Fixed line telephone
* Mobile phone
* Broadband
* Digital television
* Internet television
* IT and network services

Revenue|  ¥11.39 trillion (2017)[1]

Operating income

|  ¥1.53 trillion (2017)[1]

Net income

|  ¥800 billion (2017)[1]
Total assets|  ¥21.25 trillion (2017)[1]
Total equity|  ¥9.05 trillion (2017)[1]
Owner| Government of Japan (32.6%)[2]

Number of employees

| 274,844 (2016)[1]
Subsidiaries| NTT Communications
Dimension Data
NTT Data
NTT DoCoMo
NTT i3
NTT Security
Website| www.ntt.co.jp
www.ntt-global.com

The Japan Telegraph and Telephone Corporation (日本電信電話株式会社, Nippon Denshin Denwa Kabushiki-gaisha), commonly known as NTT, is a Japanese telecommunications company headquartered in Tokyo, Japan. Ranked 65th in Fortune Global 500, NTT is the fourth largest telecommunications company in the world in terms of revenue.

The company is incorporated pursuant to the NTT Law (Law Concerning Japan Telegraph and Telephone Corporation, Etc.).[3] The purpose of the company defined by the Law is to own all the shares issued by Japan Telegraph and Telephone East Corporation (NTT East) and Japan Telegraph and Telephone West Corporation (NTT West) and to ensure proper and stable provision of telecommunications services all over Japan including remote rural areas by these companies as well as to conduct research relating to the telecommunications technologies that will form the foundation for telecommunications.

While NTT is listed on Tokyo, Osaka, New York, and London stock exchanges, the Japanese government still owns roughly one-third of NTT's shares, regulated by the NTT Law.

## Contents

* 1 History
* 1.1 Corporate history timeline
* 2 Subsidiaries
* 2.1 Regional
* 2.2 Long distance & international
* 2.3 Mobile
* 2.4 Data (system integration)
* 2.5 Information Security
* 3 Applied R&D laboratories
* 4 Sponsorship
* 5 See also
* 6 References
* 7 External links

## History

NTT was established as a government-owned corporation in 1953

Established as a monopoly government-owned corporation in 1952, Japan Telegraph and Telephone Public Corporation (日本電信電話公社, Nippon Denshin Denwa Kōsha) was privatized in 1985 to encourage competition in the telecom market. In 1987, NTT made the largest stock offering to date, at US$36.8 billion.[4][5]

Because NTT owns most of the last mile (FTTC or FTTB/FTTH), it enjoys oligopolistic control over land lines in Japan. In order to weaken NTT, the company was divided into a holding company (NTT) and three telecom companies (NTT East, NTT West, and NTT Communications) in 1999. The NTT Law regulating NTT East and West requires them to serve only short distance communications and obligates them to maintain telephone service all over the country. They are also obligated to lease their unused optical fiber (dark fiber) to other carriers at regulated rates. NTT Communications is not regulated by the NTT Law.

In July 2010, NTT and South Africa n IT company Dimension Data Holdings announced an agreement of a cash offer from NTT for Dimension Data's entire issued share capital, in £2.12bn ($3.24bn) deal.[6]

In late 2010, NTT's Japan-to-US transpacific network reached 400 Gbit/s. In August 2011, its network capacity was expanded to 500 Gbit/s.[7]

### Corporate history timeline

* 1952 Japan Telegraph and Telephone Public Corporation established
* 1979 INS Concept announced
* 1985 Japan Telegraph and Telephone Corporation (JTT) incorporated as a private company
* 1987 NTT listed on the First Section of the Tokyo Stock Exchange
* 1988 NTT DATA Corporation started operations
* 1990 VI&P Concept announced
* 1992 NTT Mobile Communications Network, Inc. (presently JTT DOCOMO) started operations
* 1994 Basic Concept for the Coming Multimedia Age announced
* 1995 NTT DATA listed on the Second Section of the Tokyo Stock Exchange
* 1996 21st Century R&D Vision announced
* 1996 NTT DATA listed on the First Section of the Tokyo Stock Exchange
* 1997 Digitization of communications network in Japan completed
* 1998 Global Information Sharing Concept announced
* 1998 NTT DOCOMO listed on the First Section of the Tokyo Stock Exchange
* 1999 NTT's operations reorganized into a holding-company structure: businesses transferred to three new wholly owned subsidiaries (NTT East, NTT West, and NTT Communications)
* 2002 prefecture-based subsidiaries of NTT East and NTT West started operations
* 2002 "Vision for a New Optical Generation" announced
* 2004 NTT Urban Development Corporation listed on the First Section of the Tokyo Stock Exchange
* 2004 "NTT Group's Medium-Term Management Strategy" announced
* 2008 announcement of a new Medium-Term Management Strategy: "Road to Service Creation Business Group"

## Subsidiaries

NTT Group consists of the following major companies, divided into five segments. NTT East, NTT West, NTT Communications, NTT DoCoMo, and NTT Data are most major subsidiaries. NTT DoCoMo and NTT Data are listed on the stock markets. NTT Urban Development is a subsidiary involved in real estate.[8]

### Regional

NTT phonebooth

* NTT East (Tokyo)
* NTT West (Osaka)

### Long distance & international

* NTT Communications
* NTT MSC
* Verio Inc
* NTT America
* NTT Europe
* HKNet
* Plala Networks

### Mobile

* NTT DoCoMo

### Data (system integration)

* Dimension Data
* e-shelter [9]
* NTT Data
* NTT Comware
* NTT Software
* NTT IT

### Information Security

* NTT Security (integrating Solutionary (US), NTT Com Security (formerly Integralis), and Earthwave (Australia)).

## Applied R&D laboratories

* NTT Innovation Institute, Inc.
* Service innovation Laboratory Group
* Service evolution Laboratories
* Media intelligence Laboratories (Yokosuka)
* Software innovation center (Yokoska)
* Secure Platform Laboratories
* Information Network Laboratory Group
* Network technology Laboratories (Musashino)
* Network Service Systems Laboratories (Musashino)
* Access Network Service Systems Laboratories (Tsukuba and Yokoska)
* Energy and Environment Systems Laboratories (Atsugi)
* Science and Core Technology Laboratory Group
* Network Innovation Laboratories (Yokoska)
* Microsystem Integration Laboratories (Atsugi)
* Photonics Laboratories (Atsugi)
* Communication Science Laboratories (Keihanna and Atsugi)
* Basic Research Laboratories (Atsugi)

## Sponsorship

* Omiya Ardija and Roasso Kumamoto (Japanese football clubs formerly affiliated with NTT)
* Hitotsuyama Team (Super GT teams affiliated with NTT Docomo)
* Chip Ganassi Racing in the IndyCar Series (affiliated with NTT Data, drivers include Tony Kanaan, Scott Dixon, Ed Jones, and Felix Rosenqvist)
* Turner Scott Motorsports in the NASCAR Nationwide Series with Kyle Larson (formerly affiliated with NTT Data)

## See also

* Telegraph
* Telephone

## References

1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "Financial Results Release for the Fiscal Year ended March 31, 2011" (PDF). Nippon Telegraph and Telephone Corporation. May 13, 2011. https://www.google.com/finance?q=NYSE:NTT&fstype=ii. Retrieved July 29, 2011.
2. ↑ "The Japanese National Property System and Current Conditions" (PDF). Ministry of Finance Japan. March 2013. http://www.mof.go.jp/english/national_property/2013.pdf. Retrieved May 14, 2014.
3. ↑ "English translation of the "Law Concerning Japan Telegraph and Telephone Corporation, Etc."". http://www.soumu.go.jp/joho_tsusin/eng/Resources/laws/NTTLaw.pdf.
4. ↑ Vartan, Vartanig G. (November 9, 1987). "Market Place; Big Stock Sale By Japanese". The New York Times. https://www.nytimes.com/1987/11/09/business/market-place-big-stock-sale-by-japanese.html?pagewanted=1.
5. ↑ "U.S. set to make $8 billion from bailing out Citi". 27 March 2010. http://www.msnbc.msn.com/id/36062775/ns/business-washington_post.
6. ↑ "NTT buys South Africa's Dimension Data". BBC News. July 14, 2010. https://www.bbc.co.uk/news/business-10644327. Retrieved July 14, 2010.
7. ↑ Sean Buckley, Fierce Telecom. "NTT's Japan to U.S. network route reaches 500 Gbps mark." Aug 3, 2011. Retrieved Aug 4, 2011.
8. ↑ Melby, Caleb (March 13, 2018). "Kushner Conflict Cloud Hovers Over Brooklyn Sale Linked to Japan". Bloomberg News. https://www.bloomberg.com/news/articles/2018-03-13/kushner-conflict-cloud-hovers-over-brooklyn-sale-linked-to-japan. "A spokesman for the subsidiary, NTT Urban Development, said the company knew the deal involved Kushner Cos. The subsidiary describes itself as the real estate arm of NTT."
9. ↑ "NTT Communications Acquires 86.7% Stake in e-shelter, Germany’s top data-center operator". http://www.ntt.com/en/about-us/press-releases/news/article/2015/20150623.

## External links

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Links to related articles

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* t
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Telecommunications

History|

* Beacon
* Broadcasting
* Cable protection system
* Cable TV
* Communications satellite
* Computer network
* Data compression
* audio
* DCT
* image
* video
* Digital media
* Internet video
* online video platform
* social media
* streaming
* Drums
* Edholm's law
* Electrical telegraph
* Fax
* Heliographs
* Hydraulic telegraph
* Information Age
* Information revolution
* Internet
* Mass media
* Mobile phone
* Smartphone
* Optical telecommunication
* Optical telegraphy
* Pager
* Photophone
* Prepaid mobile phone
* Radio
* Radiotelephone
* Satellite communications
* Semaphore
* Semiconductor
* device
* MOSFET
* transistor
* Smoke signals
* Telecommunications history
* Telautograph
* Telegraphy
* Teleprinter (teletype)
* Telephone
* The Telephone Cases
* Television
* digital
* streaming
* Undersea telegraph line
* Videotelephony
* Whistled language
* Wireless revolution

Pioneers|

* Nasir Ahmed
* Edwin Howard Armstrong
* Mohamed M. Atalla
* John Logie Baird
* Paul Baran
* John Bardeen
* Alexander Graham Bell
* Tim Berners-Lee
* Jagadish Chandra Bose
* Walter Houser Brattain
* Vint Cerf
* Claude Chappe
* Yogen Dalal
* Donald Davies
* Lee de Forest
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* Reginald Fessenden
* Elisha Gray
* Oliver Heaviside
* Erna Schneider Hoover
* Harold Hopkins
* Internet pioneers
* Bob Kahn
* Dawon Kahng
* Charles K. Kao
* Narinder Singh Kapany
* Hedy Lamarr
* Innocenzo Manzetti
* Guglielmo Marconi
* Robert Metcalfe
* Antonio Meucci
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* Radia Perlman
* Alexander Stepanovich Popov
* Johann Philipp Reis
* Claude Shannon
* Henry Sutton
* Nikola Tesla
* Camille Tissot
* Alfred Vail
* Charles Wheatstone
* Vladimir K. Zworykin

Transmission
media|

* Coaxial cable
* Fiber-optic communication
* optical fiber
* Free-space optical communication
* Molecular communication
* Radio waves
* wireless
* Transmission line
* data transmission circuit
* telecommunication circuit

Network topology
and switching|

* Bandwidth
* Links
* Nodes
* terminal
* Network switching (circuit
* packet)
* Telephone exchange

Multiplexing|

* Space-division
* Frequency-division
* Time-division
* Polarization-division
* Orbital angular-momentum
* Code-division

Networks|

* ARPANET
* BITNET
* Cellular network
* Computer
* CYCLADES
* Ethernet
* FidoNet
* Internet
* Internet2
* ISDN
* LAN
* Mobile
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