KDDI Corporation
Type Public (TYO: 9433)
Industry Telecommunications
Founded March 24, 1953 as Kokusai Denshin Denwa Co., Ltd. (KDD)
June 1, 1984 as Daini-Denden Planning, Inc. (DDI)
November 16, 1984 as Teleway Japan Corporation
March 9, 1987 as Nippon Idou Tsushin Corporation (IDO)[1]
Headquarters Chiyoda, Tokyo, Japan
Key people Takashi Tanaka, President
Tadashi Onodera, Chairman
Products Telephone, Internet, Mobile Phone (CDMA Network)
Revenue increase$35.950 billion USD (2009)[2]
Net income increase$2.758 billion USD (2009)[2]
Employees 18,566 (2010)[2]
Parent Kyocera (12.76%)
Toyota (11.09%)
TEPCO (7.97%)
Subsidiaries KDDI R&D Labs
KDDI Network & Solutions
Kokusai Cable Ship
Okinawa Cellular Telephone
KDDI America
KDDI Building in Shinjuku, which used to be the headquarters of KDD.

KDDI Corporation (KDDI株式会社 KDDI Kabushiki Gaisha?) (TYO: 9433) is a Japanese telecommunications operator formed in October 2000 through the merger of DDI Corp., KDD Corp., and IDO Corp.[3] It has its headquarters in the Garden Air Tower in Iidabashi, Chiyoda, Tokyo.[4]

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".



On April 1, 2002, au by KDDI launched 3G 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. [1]

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.

See also

References and footnotes

  1. ^ History of KDDI KDDI Corporate Information
  2. ^ a b c "2010 Form 10-K, KDDI". Hoover's. 
  3. ^ Merger of DDI, KDD and IDO
  4. ^ "Corporate Data." KDDI. Retrieved on February 21, 2010.

External links

Portal icon Tokyo portal
Portal icon Companies portal

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