Nippon Telegraph and Telephone Corporation operates as a telecommunications company in Japan and internationally. It operates through Integrated ICT Business, Regional Communications Business, Global Solutions Business, and Others segments. The Integrated ICT Business segment offers mobile phone, domestic inter-prefectural communications, international communications, solutions, and system development and related services. The Regional Communications Business segment provides intra-prefectural communications and related ancillary services. The Global Solutions Business segment offers consulting, system and software development, network system, cloud, global data center, and related services. The Others segment engages in the real estate, energy, and other businesses. The company was founded in 1952 and is headquartered in Tokyo, Japan.