KDDI Corporation(Customer Care, Toll-Free Helpline Phone Number, Office Address) – KDDI Corporation is a Japanese media communications administrator was founded on 1st October 2000, through the merger of DDI Corp. (Daini-Denden Inc.), KDD (Kokusai Denshin Denwa) Corp., and IDO Corp. This company has its central station in the Garden Air Tower in Iidabashi, Chiyoda, Tokyo. The founder of this company is Kazuo Inamori and the C.E.O of the company is Takashi Tanaka.