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（End of March, 2022）
Nippon Telegraph and Telephone Corporation
For NTT Group as a whole, formulation of management strategies and promotion of basic research
Integrated ICT Business
Mobile phone services, domestic inter-prefectural communications services, international communications services, solutions services, and system development services and related services.
Mobile telecommunications services, docomo Hikari, etc.
Regional Communications Business
Domestic intra-prefectural communications services and related ancillary services.
FLET'S Hikari, Hikari Collaboration Model, etc.
Global Solutions Business
NTT DATA, Inc.
System integration services, network system services, cloud services, global data center services, and related services, etc.
Cloud services, global data center services, managed services, and System integration services, etc.
Others (Real Estate, Energy and Others)
NTT Urban Solutions
NTT Anode Energy
Real estate business, energy business and others.
NTT is the first telecommunications operator to become a member of global initiatives to make smarter use of energy, “EP100” and “EV100” (Oct. 2018)
Established a council to promote secure digital economy together with multi-national companies
WEB media that thinks about the future with NTT