Japan KDDI TELECOM CORPORATION (ケイディ ーディーアイ,KDDI CORPORATION) is a Japanese telecommunications company, formerly known as the second electricity (DDI), founded in 1984, merged in 2000 with the International Telecommunication Telephone (KDD), Japan Mobile Communications (IDO) into KDDI, headquartered in Tokyo, Japan. KDDI Telecom was ranked 233rd in the 2013 World Top 500.