() is a Japanese

telecommunications Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than tha ...

operator formed on October 1, 2000 through the

merger Mergers and acquisitions (M&A) are business transactions in which the ownership of companies, other business organizations, or their operating units are transferred to or consolidated with another company or business organization. As an aspect ...

of DDI Corp. (Daini-Denden Inc.), KDD (Kokusai Denshin Denwa) Corp. (itself a former listed state-owned enterprise privatized in 1998), and IDO Corp. It has its headquarters in the Garden Air Tower in Iidabashi, Chiyoda,

Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and List of cities in Japan, largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, ...

. KDDI provides mobile cellular services using the " au by KDDI" brand. ISP network 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 Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. ...

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 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. In 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 Java Platform, Micro Edition or Java ME is a computing platform for development and deployment of portable code for embedded and mobile devices (micro-controllers, sensors, gateways, mobile phones, personal digital assistants, TV set-top ...

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 CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G mobile technology standards for sending voice, data, and Signaling (telecommunication), signaling data between mobile phones and cell sites. It is developed by 3GP ...

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. In January 2007, KDDI announced its ten new 3G models for spring 2007, and a concept of its new designer phone Media Skin by

Tokujin Yoshioka is a Japanese designer and artist. He is active in the fields of design, architecture and contemporary art, and he is internationally acclaimed for his works dealing with light and nature. Many of his works chosen as part of permanent collect ...

which would later be displayed at the

Museum of Modern Art The Museum of Modern Art (MoMA) is an art museum located in Midtown Manhattan, New York City, on 53rd Street (Manhattan), 53rd Street between Fifth Avenue, Fifth and Sixth Avenues. It plays a major role in developing and collecting modern art, ...

New York New York most commonly refers to: * New York City, the most populous city in the United States, located in the state of New York * New York (state), a state in the northeastern United States New York may also refer to: Film and television * '' ...

with the Infobar, Talby and Neon models.

Toshiba , commonly known as Toshiba and stylized as TOSHIBA, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. Its diversified products and services include power, industrial and social infrastructure systems ...

, Casio, Sanyo, Kyocera,

Hitachi () is a Japanese multinational corporation, multinational Conglomerate (company), conglomerate corporation headquartered in Chiyoda, Tokyo, Japan. It is the parent company of the Hitachi Group (''Hitachi Gurūpu'') and had formed part of the Ni ...

Sony Ericsson Sony Mobile Communications Inc. ( ja, ソニーモバイルコミュニケーションズ株式会社) was a multinational telecommunications company founded on October 1, 2001, as a joint venture between Sony Group Corporation and Ericsson. I ...

, Sharp, and

Panasonic formerly between 1935 and 2008 and the first incarnation of between 2008 and 2022, is a major Japanese multinational conglomerate corporation, headquartered in Kadoma, Osaka. It was founded by Kōnosuke Matsushita in 1918 as a lightbulb ...

have manufactured the other models. In March 2007, Media Skin started selling. KDDI announced that it would collaborate with the Taiwanese manufacturer HTC Corp. to sell the mobile phone HTC J in Japan starting May 2012. The HTC J mobile phone featured the Android 4.0 operating system. On October 21, 2011 KDDI buys Content Delivery Network CDNetworks For $167 Million. KDDI together with Sumitomo Group signed an agreement with

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...

State owned Myanmar Post and Telecommunication (MPT) in July 2014 to jointly operate a mobile phone service in Myanmar for next 10 years. 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 PDC may refer to: In science and technology Chemistry, biology and medicine * Phosducin, a human protein and gene in the retina * Pyridinium dichromate (Cornforth reagent), a chromium-based oxidant * Pyruvate dehydrogenase complex, an enzyme ...

cellular operator in three metropolitan areas (Tokyo,

Nagoya is the largest city in the Chūbu region, the fourth-most populous city and third most populous urban area in Japan, with a population of 2.3million in 2020. Located on the Pacific coast in central Honshu, it is the capital and the most p ...

, and Osaka), which did not apply a 3G license. TU-KA was best known for having singer

Ayumi Hamasaki is a Japanese singer, songwriter, record producer, actress, model, spokesperson, and entrepreneur. By 2002, Hamasaki had earned the nickname "Empress of J-pop" due to her popularity in Japan and throughout Asia. Due to her success and relevanc ...

to appear in their commercials. TU-KA was closed on March 31, 2008. DDI Pocket, a

PHS PHS may refer to: Organizations * ''Partido Humanista da Solidariedade'' (Humanist Party of Solidarity), a Brazilian political party * Peninsula Humane Society, for animal welfare in San Mateo County, California, US * Pennsylvania Horticultural ...

operator, was previously owned by KDDI but has now been spun off as Willcom. In August 2014, KDDI announced it was joining forces with five other global companies, including

Google Google LLC () is an American Multinational corporation, multinational technology company focusing on Search Engine, search engine technology, online advertising, cloud computing, software, computer software, quantum computing, e-commerce, ar ...

to build a 60Tbit/s undersea data transmission cable linking the United States West Coast and Japan. The cable started operation in June 2016. KDDI and

Ericsson (lit. "Telephone Stock Company of LM Ericsson"), commonly known as Ericsson, is a Sweden, Swedish multinational networking and telecommunications company headquartered in Stockholm. The company sells infrastructure, software, and services in ...

began working together in December 2015 in order to research and develop 5G technology.

Lawsuits

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. The parties agreed on a $4.4 million settlement in 2006.

References and footnotes

{{DEFAULTSORT:Kddi Companies listed on the Tokyo Stock Exchange Japanese brands Japanese companies established in 1953 Mobile phone companies of Japan Telecommunications companies based in Tokyo Telecommunications companies established in 1953

History

Lawsuits

See also

References and footnotes