KDDI

KDDI Corporation
Native name
KDDI株式会社
Keidīdīai kabushiki gaisha
Company typePublic KK
TYO: 9433
TOPIX Core 30 Component
IndustryTelecommunications
Founded1953; 71 years ago (1953) (establishment of Kokusai Denshin Denwa or KDD as a state-owned enterprise)[1][2]
FounderGovernment of Japan (for the KDD branch)
Kazuo Inamori (for the DDI branch)
HeadquartersChiyoda, Tokyo, Japan
Key people
Takashi Tanaka(businessman) [jp], CEO
Makoto Takahashi(businessman) [jp], President & CEO
ProductsFixed line and mobile telephony, Internet services, digital television
RevenueIncrease JP¥ 5.24 trillion (2020)[3]
Increase JP¥ 639.77 billion (2020)[3]
Number of employees
44,952 (2020)[3]
Subsidiaries
List
  • Okinawa Cellular Telephone Company (53.9%)
  • JCOM (50%)
  • UQ Communications (32.3%)
  • BIGLOBE
  • Aeon Holdings
  • Chubu Telecommunications
  • Wire and Wireless
  • Telasa (50%)
  • au Financial Holdings
  • Supership Holdings
  • au Energy Holdings
  • KDDI Matomete Office
  • KDDI Digital Divergence Holdings
  • KDDI Engineering
  • KDDI Research
  • KDDI Cableships & Subsea Engineering
  • Japan Telecommunication Engineering Service
  • KDDI America
  • KDDI China
  • KDDI Asia Pacific
  • Telehouse Holdings
  • Kyocera Communication System (23.4%)
  • Mobaoku (33.4%)
  • Kakaku.com (17.4%)
  • Lac (32.4%)
Websitewww.kddi.com

KDDI Corporation (KDDI株式会社, KDDI Kabushiki Gaisha) (TYO: 9433) is a Japanese telecommunications 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 named Au, 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, following NTT Docomo.

KDDI provides mobile cellular services using the Au 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 broadband services carry the brand name "ADSL One", and IP telephony over copper is branded as "Metal Plus".

  1. ^ "KDDI Corporation: Private Company Information". bloomberg.com. Retrieved 6 May 2018.
  2. ^ "History | About KDDI". kddi.com. Retrieved 6 May 2018.
  3. ^ a b c "KDDI Annual Report" (PDF) (Press release). Retrieved February 17, 2021.