Nippon Telegraph and Telephone Corporation and its subsidiaries (NTT Group) is a provider of wireline and wireless voice, data, Internet and related telecommunications services in Japan. The Company also operates a telephone network. Its predominant business is providing nationwide telecommunications services. These services fall into seven major classes: telephone services, telegraph services, leased circuit services, data communications facility services, integrated services digital network (ISDN) services, sale of telecommunications equipment and other services.
