9433 on Tokyo Stock Exchange

KDDI

Logo: 鉄之介, Public domain, via Wikimedia Commons3

Japanese telecommunications operator

KDDI Corporation (Japanese: KDDI株式会社, Hepburn: Keidīdīai kabushiki gaisha) is a Japanese telecommunications operator. It was established in 2000 through the merger of DDI Corporation (第二電電, Daini Denden), a long-distance communications company; KDD Corporation (ケイディディ), Japan's former state-monopoly international telecommunications provider; and IDO Corporation (日本移動通信, Nippon Idō Tsūshin), a mobile network operator.2 From Wikipedia, CC BY-SA 4.0

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Last updated Oct 16, 2026.

Overview

1984Founded1

Compare with another stock.

  • Ticker9433 on Tokyo Stock Exchange1
  • Industrymobile phone industry, telecommunications industry1
  • HeadquartersChiyoda1
  • Websitewww.kddi.com
  • Legal formkabushiki gaisha1
Garden Air Tower
Photo: Akonnchiroll, CC BY-SA 4.0, via Wikimedia Commons4

KDDI Corporation (Japanese: KDDI株式会社, Hepburn: Keidīdīai kabushiki gaisha) is a Japanese telecommunications operator. It was established in 2000 through the merger of DDI Corporation (第二電電, Daini Denden), a long-distance communications company; KDD Corporation (ケイディディ), Japan's former state-monopoly international telecommunications provider; and IDO Corporation (日本移動通信, Nippon Idō Tsūshin), a mobile network operator.2

The story

Founded by Kazuo Inamori in 1984.1

Leadership

Who has led KDDI, and when. Pick a name to see everywhere that person has worked.

Products and brands

  • telephone

Listed on Wikidata.1

Subsidiaries and ownership

Parent company

Owners

Subsidiaries

  • A-Sketch
  • Chubu Telecommunications
  • KDDI Mobile
  • KDDI Museum
  • Okinawa Cellular Telephone
  • TELASA Corporation
  • Telehouse America
  • Telehouse Europe
  • h2o Wireless
  • Natasha,Inc. since Aug 21, 2014
  • Mobicom Corporation since Mar 2016
  • BIGLOBE since Jan 31, 2017

Also owns

  • GREE, Inc. 4.5%
  • Lawson
  • au
  • povo
  • UQ mobile since Oct 1, 2020

From Wikidata.1

Acquisitions

  1. Oct 1, 2020Acquired UQ mobile1
  2. Jan 31, 2017Acquired BIGLOBE1
  3. Mar 2016Acquired Mobicom Corporation1
  4. Aug 21, 2014Natasha,Inc. became a subsidiary1
  5. 2006Acquired GREE, Inc.1

Employees over time

  • 201018,4181

Timeline

  1. Oct 1, 2020Acquisition Acquired UQ mobile1
  2. 1984Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
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