 | This article has multiple issues. Please helpimprove it or discuss these issues on thetalk page.(Learn how and when to remove these messages) (Learn how and when to remove this message)
|
 | |
 Headquarters inIidabashi,Chiyoda, Tokyo | |
Native name | KDDI株式会社 |
|---|---|
Romanized name | Keidīdīai kabushiki gaisha |
| Formerly | DDI Corporation (1984–2000) |
| Company type | Public |
| TYO:9433 TOPIX Core 30 Component | |
| Industry | Telecommunications |
| Predecessor | KDD Corporation IDO Corporation |
| Founded | 1953; 72 years ago (1953) (establishment of Kokusai Denshin Denwa or KDD as a state-owned enterprise)[1][2] June 1, 1984; 41 years ago (1984-06-01) (as DDI) |
| Founder | Government of Japan (for the KDD branch) Kazuo Inamori (for the DDI branch) |
| Headquarters | Iidabashi,, Japan |
Key people | Takashi Tanaka (businessman) [jp] (CEO) Makoto Takahashi (businessman) [jp] (president & CEO) |
| Products | |
| Revenue |  JP¥ 5.24 trillion (2020)[3] |
| JP¥ 639.77 billion (2020)[3] | |
Number of employees | 44,952 (2020)[3] |
| Subsidiaries | List
|
| Website | www |
KDDI Corporation (KDDI株式会社,KDDI Kabushiki Gaisha) is a Japanesetelecommunications operator. It was established in 2000 through the merger of DDI (第二電電,Daini Denden), KDD (ケイディディ), and IDO (日本移動通信,Nippon Idō Tsūshin). In 2001, it merged with a subsidiary namedAu, which was formed through the merger of seven automotive and mobile phone companies from the DDI-Cellular Group. As of 2020, it is the second-largest mobile telecommunications provider in Japan in terms of the number of contracts, followingNTT Docomo.
KDDI provides mobile cellular services using the Au brand. ISP network services are provided under theau one net brand, while "au Hikari" is the name under which long-distance and international voice and data communications services andFiber 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 launched3G networks usingCDMA2000 1x technology.[citation needed]
On November 28, 2003, au by KDDI launchedEV-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.[citation needed]
In December 2006, au by KDDI became the first carrier to provide anEV-DO Rev A service at a data rate of 3.1Mbit/s (downlink), 1.8 Mbit/s (uplink).[citation needed]
au by KDDI has been very successful with its EZ wireless data services, EZweb, EZweb@mail, EZappli, EZchakuuta, ezmovie, and EZnaviwalk (GPS), using the advancedWAP technology. It supports bothJava ME andBREW application environments.[citation needed]
In November 2004 au by KDDI introduced the music include ringtone download serviceChaku 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 lengthChaku Uta Full songs.[citation needed]
As of end of June 2005, au by KDDI has 20,122,700 customers, among which 18,723,200 (93%) are3GCDMA2000 subscribers. It is Japan's second-largest cellular operator with an increasing 20.0% market share.[citation needed]
On January 26, 2006, the first pointing local search application, Mapion Local Search - Powered byGeoVector, was launched on the KDDI network on their GPS and compass equipped handsets.[4] In January 2007, KDDI announced its ten new 3G models for spring 2007, and a concept of its new designer phone Media Skin byTokujin Yoshioka which would later be displayed at theMuseum of Modern Art inNew York with the Infobar, Talby and Neon models.Toshiba,Casio,Sanyo,Kyocera,Hitachi,Sony Ericsson,Sharp, andPanasonic have manufactured the other models.[5] In March 2007, Media Skin started selling.[6]
KDDI announced that it would collaborate with the Taiwanese manufacturerHTC Corp. to sell the mobile phoneHTC J in Japan starting May 2012. The HTC J mobile phone featured the Android 4.0 operating system.[7][8]
On October 21, 2011, KDDI buys Content Delivery NetworkCDNetworks For $167 Million.[9]
KDDI together withSumitomo Group signed an agreement withMyanmar State ownedMyanmar Post and Telecommunication (MPT) in July 2014 to jointly operate a mobile phone service in Myanmar for next 10 years.[10]
Consumer showroom is set inHarajuku called, "KDDI Designing Studio".
TU-KA (TU-KA by KDDI), a subsidiary company of KDDI, was a 2GPDC cellular operator in three metropolitan areas (Tokyo,Nagoya, and Osaka), which did not apply a 3G license. TU-KA was best known for having singerAyumi Hamasaki to appear in their commercials. TU-KA was closed on March 31, 2008.
DDI Pocket, aPHS operator, was previously owned by KDDI but was spun off asWillcom which is now incorporated intoY!Mobile.
In August 2014, KDDI announced it was joining forces with five other global companies, includingGoogle to build a 60 Tbit/s undersea data transmission cable linking the United States West Coast and Japan.[11] The cable started operation in June 2016.[12]
KDDI andEricsson began working together in December 2015 in order to research and develop5G technology.[13]
In 2003, several class action complaints were filed against DDI for misrepresenting and/or failing to disclose material facts about the company's financial results.[14] The parties agreed on a $4.4 million settlement in 2006.[15]
| Divisions and subsidiaries |
| ||||
|---|---|---|---|---|---|
| Joint ventures and shareholdings | |||||
| Services | |||||
| Other | |||||
| International | |
|---|---|
| National | |
| Other | |
