Chaku-Uta Full
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| Public (K.K.) | |
| Traded as | : TOPIX Core 30 Component |
| Industry | Telecommunications |
| Founded | June 1, 1984 |
| Founder | Kazuo Inamori |
| Headquarters | Chiyoda, Tokyo, Japan |
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Key people
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Takashi Tanaka, CEO |
| Products | Fixed line and mobile telephony, Internet services, digital television |
| Revenue |
 US$ 42.57 billion (2015) |
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US$ 3.1 billion (2012) |
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Number of employees
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18,418 (2010) |
| Parent |
Kyocera (12.76%) Toyota (11.09%) |
| Subsidiaries | KDDI R&D Labs KDDI Network & Solutions Kokusai Cable Ship Okinawa Cellular Telephone KDDI America KDDI Global |
| Website | www.kddi.com |
KDDI Corporation (KDDI株式会社 KDDI Kabushiki Gaisha) (: ) is a Japanese telecommunications operator formed in October 1, 2000 through the merger of DDI Corp. (Daini-Denden Inc.), KDD (Kokusai Denshin Denwa) 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".
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 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.
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Wikipedia