|Jupiter Telecommunications (J:COM), 1/2010||$4B|
Tokyo-based KDDI Corporation is a Japanese telecommunications operator. It was created in 2000 through a merger of DDI, KDD and IDO and now employs over 15,000 people.
The company provides a broad range of services, including fixed-line phone communication, mobile phone and web services, and Internet services. It also has a ownership stake in two Japanese cable television companies, Jupiter Telecommunications (J:COM) and Japan Cablenet (JCN).
KDDI’s mobile phone and web arm is branded as “au”. The company is the current No. 2 in Japan’s mobile communications market, trailing NTT DoCoMo and ahead of SoftBank.