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Offering up the usual gamut of fixed-line , mobile , internet and television services , KDDI Japan was formed in 2000 via the merger of three companies with similarly initialed names : DDI , KDD and IDO . Its mobile services are provided through the “ au by KDDI ” brand . The company is working on bringing 5G networks to Japan , in collaboration with both Samsung and Ericsson , with whom they have been working since 2015 . 5G service is expected to begin in March 2020 .

Takashi Tanaka , Chairman

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