NTT

NTT, short for Nippon Telegraph and Telephone Corporation, is a Japanese multinational telecommunications holding company. It is headquartered in Tokyo and one of the largest telecom groups in the world by revenue and assets. The company traces its origins to the Nippon Telegraph and Telephone Public Corporation, a government-owned monopoly established in 1952 to operate Japan’s national telecommunications networks. In 1985, the government privatized the entity, forming NTT as a holding company and creating a number of regional affiliates. Over the following decades the group reorganized into specialized units, including those responsible for domestic fixed-line services (NTT East and NTT West) and other lines of business.

The NTT Group operates across fixed-line and mobile communications, data services, network infrastructure, and IT services. Its major publicly recognized subsidiaries include NTT DoCoMo, a leading mobile operator in Japan, NTT Data, which provides information technology services, and NTT Communications, which offers international networking, cloud, and managed services. The group also comprises cybersecurity, systems integration, and data center offerings, among others. Globally, NTT operates through affiliates and subsidiaries that provide cloud, security, and IT delivery services to corporate and public-sector customers.

NTT is subject to Japanese regulatory oversight by the Ministry of Internal Affairs and Communications and participates in national policy discussions related to telecommunications, spectrum allocation, and digital infrastructure. The company has pursued investments in next-generation networks, data centers, and cybersecurity to support digital transformation in Japan and worldwide.