KDDI
Encyclopedia
is a Japan
ese telecommunications operator formed in October 2000 through the merger of DDI Corp., KDD Corp., and IDO Corp. It has its headquarters in the Garden Air Tower in Iidabashi
, Chiyoda
, Tokyo
.
KDDI provides mobile cellular services using the "au by KDDI" brand. ISP network and solution services are provided under the au one net
brand, while "au Hikari" is the name under which long-distance and international voice and data communications services and Fiber to the Home (FTTH) services are marketed. ADSL broadband services carry the brand name "ADSL One", and IP telephony over copper is branded as "Metal Plus".
networks using CDMA2000 1x technology.
On November 28, 2003, au by KDDI launched EV-DO Rev 0
service in the "CDMA 1X WIN" brand, and revolutionized Japan's mobile telecommunication industry by introducing fixed rate data subscription plans at a data rate of 2.4 Mbit/s.
On December, 2006, au by KDDI became the first carrier to provide an EV-DO Rev A service at a data rate of 3.1Mbit/s (downlink), 1.8Mbit/s (uplink).
au by KDDI has been very successful with its EZ wireless data services, EZweb, EZweb@mail, EZappli, EZchakuuta, ezmovie, and EZnaviwalk (GPS), using the advanced WAP
technology. It supports both Java ME and BREW application environments.
In November 2004 au by KDDI introduced the music include ringtone download service Chaku Uta Full (music ringtone full), for download of full length songs to mobile phones. Within six months from introduction, on June 15, 2005, customers had downloaded 10 million full length Chaku Uta Full songs.
As of end of June 2005, au by KDDI has 20,122,700 customers, among which 18,723,200 (93 %) are 3G
CDMA2000
subscribers. It is Japan's second-largest cellular operator with an increasing 20.0% market share.
On January 26, 2006 the first pointing local search application, Mapion Local Search - Powered by GeoVector
, was launched on the KDDI network on their GPS and compass equipped handsets. http://www.geovector.com/press/mls.html
Consumer showroom is set in Harajuku
called, "KDDI Designing Studio".
TU-KA (TU-KA by KDDI), a subsidiary company of KDDI, was a 2G PDC
cellular operator in three metropolitan areas (Tokyo, Nagoya, and Osaka), which did not apply a 3G license. TU-KA was best known for having singer Ayumi Hamasaki
to appear in their commercials. TU-KA was closed on March 31, 2008.
DDI Pocket, a PHS
operator, was previously owned by KDDI but has now been spun off as Willcom
.
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
ese telecommunications operator formed in October 2000 through the merger of DDI Corp., KDD Corp., and IDO Corp. It has its headquarters in the Garden Air Tower in Iidabashi
Iidabashi, Tokyo
is a district of Chiyoda, Tokyo, Japan. It was in the former ward of Kōjimachi, which existed in Tokyo until 1947. Its postal code is 102-0072.-Etymology:...
, Chiyoda
Chiyoda, Tokyo
is one of the 23 special wards in central Tokyo, Japan. In English, it is called Chiyoda ward. As of October 2007, the ward has an estimated population of 45,543 and a population density of 3,912 people per km², making it by far the least populated of the special wards...
, Tokyo
Tokyo
, ; officially , is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family...
.
KDDI provides mobile cellular services using the "au by KDDI" brand. ISP network and solution services are provided under the au one net
Au one net
is a Japanese internet service provider run by KDDI Corporation and founded in July, 1997. The service name was dion until September 2007.-External links:*...
brand, while "au Hikari" is the name under which long-distance and international voice and data communications services and Fiber to the Home (FTTH) services are marketed. ADSL broadband services carry the brand name "ADSL One", and IP telephony over copper is branded as "Metal Plus".
History
On April 1, 2002, au by KDDI launched 3G3G
3G or 3rd generation mobile telecommunications is a generation of standards for mobile phones and mobile telecommunication services fulfilling the International Mobile Telecommunications-2000 specifications by the International Telecommunication Union...
networks using CDMA2000 1x technology.
On November 28, 2003, au by KDDI launched EV-DO Rev 0
Evolution-Data Optimized
Evolution-Data Optimized or Evolution-Data only is a telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access...
service in the "CDMA 1X WIN" brand, and revolutionized Japan's mobile telecommunication industry by introducing fixed rate data subscription plans at a data rate of 2.4 Mbit/s.
On December, 2006, au by KDDI became the first carrier to provide an EV-DO Rev A service at a data rate of 3.1Mbit/s (downlink), 1.8Mbit/s (uplink).
au by KDDI has been very successful with its EZ wireless data services, EZweb, EZweb@mail, EZappli, EZchakuuta, ezmovie, and EZnaviwalk (GPS), using the advanced WAP
Wireless Application Protocol
Wireless Application Protocol is a technical standard for accessing information over a mobile wireless network.A WAP browser is a web browser for mobile devices such as mobile phones that uses the protocol.Before the introduction of WAP, mobile service providers had limited opportunities to offer...
technology. It supports both Java ME and BREW application environments.
In November 2004 au by KDDI introduced the music include ringtone download service Chaku Uta Full (music ringtone full), for download of full length songs to mobile phones. Within six months from introduction, on June 15, 2005, customers had downloaded 10 million full length Chaku Uta Full songs.
As of end of June 2005, au by KDDI has 20,122,700 customers, among which 18,723,200 (93 %) are 3G
3G
3G or 3rd generation mobile telecommunications is a generation of standards for mobile phones and mobile telecommunication services fulfilling the International Mobile Telecommunications-2000 specifications by the International Telecommunication Union...
CDMA2000
CDMA2000
CDMA2000 is a family of 3G mobile technology standards, which use CDMA channel access, to send voice, data, and signaling data between mobile phones and cell sites. The set of standards includes: CDMA2000 1X, CDMA2000 EV-DO Rev. 0, CDMA2000 EV-DO Rev. A, and CDMA2000 EV-DO Rev. B...
subscribers. It is Japan's second-largest cellular operator with an increasing 20.0% market share.
On January 26, 2006 the first pointing local search application, Mapion Local Search - Powered by GeoVector
GeoVector
GeoVector Corporation began conducting research into augmented reality in early 1990s. The company, co-founded by John Ellenby who also founded laptop pioneer GRiD Systems Corporation, devised a method to use sensors in a device to associate relevant digital information with places on earth.The...
, was launched on the KDDI network on their GPS and compass equipped handsets. http://www.geovector.com/press/mls.html
Consumer showroom is set in Harajuku
Harajuku
Harajuku is the common name for the area around Harajuku Station on the Yamanote Line in the Shibuya ward of Tokyo, Japan....
called, "KDDI Designing Studio".
TU-KA (TU-KA by KDDI), a subsidiary company of KDDI, was a 2G PDC
Personal Digital Cellular
Personal Digital Cellular is a 2G mobile telecommunications standard developed and used exclusively in Japan.After a peak of nearly 80 million subscribers to PDC, it had 46 million subscribers in December 2005, and is slowly being phased out in favor of 3G technologies like W-CDMA and CDMA2000...
cellular operator in three metropolitan areas (Tokyo, Nagoya, and Osaka), which did not apply a 3G license. TU-KA was best known for having singer Ayumi Hamasaki
Ayumi Hamasaki
is a Japanese singer-songwriter, record producer, model, lyricist, and actress. Also called "Ayu" by her fans, Hamasaki has been dubbed the "Empress of Pop" because of her popularity and widespread influence in Japan and throughout Asia. Born and raised in Fukuoka, she moved to Tokyo at fourteen to...
to appear in their commercials. TU-KA was closed on March 31, 2008.
DDI Pocket, a PHS
Personal Handy-phone System
The Personal Handy-phone System , also marketed as the Personal Access System and commercially branded as Xiaolingtong in China, is a mobile network system operating in the 1880–1930 MHz frequency band, used mainly in Japan, China, Taiwan, and some other Asian countries and...
operator, was previously owned by KDDI but has now been spun off as Willcom
Willcom
is a Japanese PHS operator, offering flat-rate wireless network data transmission and flat-rate voice calls for its subscribers.The company was formerly known as DDI Pocket, a subsidiary of KDDI. In 2004, the Carlyle Group acquired a majority stake from KDDI and changed the name of the company in...
.
See also
- au
- KDDI MobileKDDI MobileKDDI Mobile is a mobile phone service operated in the United States. The brand was established under KDDI America — local branch of Japanese telecommunication company KDDI — to meet the needs of Japanese people living in the United States. The service operates on the Sprint network as a MVNO...
- G-BOOKG-BookG-Book is a telematics subscription service currently provided by Toyota Motor Corporation in Japan for its Toyota- and Lexus-branded vehicles. G-Book allows users to link with cellphones , personal digital assistants 's, personal computers and G-Book equipped cars across Japan...
, a telematicsTelematicsTelematics typically is any integrated use of telecommunications and informatics, also known as ICT...
service provided by Toyota in Japan only