Nippon Telegraph and Telephone Corporation (NTT) is a provider of fixed and mobile voice related services, Internet protocol/packet communications services, sales of telecommunications equipment, system integration and other telecommunications-related services in Japan. NTT's five segments include regional communications business, long distance and international communications business, mobile communications business, data communications business, and other businesses. Its regional communications business includes intra-prefectural communications and ancillary services. The long distance and international communications includes inter-prefectural communications services, international communications business and solution business. The mobile communications business includes mobile telephone and related services. The data communications business offers system integration and network system services. The other segment consists of real estate and finance business.