Katsumi Nakata

NTT Communications Corp. provides domestic and international telecommunications services. It offers cloud, data center, networking, voice and video communications, managed security, operations management, and customer portal services. The company was founded on July 1, 1999 and is headquartered in Tokyo, Japan.

NTT Global Data Centers, Inc. engages in the provision of information technology services and solutions. It offers data center deployment, cloud connect, carrier connect, and dedicated project management. The company was founded by George C. Macricostas and Constantine S. Macricostas in 2000 and is headquartered in Sacramento, CA.

NTT Security (US), Inc. provides managed security services. It offers managed and professional security services, and threat intelligence. The firm's solutions include ActiveGuard, compliance, industry, and customer service. The company was founded by Steve A. Idelman, Michael Hrabik, Christopher C. Rehberg, Diamond Sheila, and Sheri Idelman in 2000 and is headquartered in Omaha, NE.

NTT DoCoMo, Inc. engages in the mobile communications business. It operates through the following segments: Telecommunications, Smart Life, and Other Businesses. The Telecommunications Business segment provides mobile communication services, optical-fiber broadband and other telecommunications services. The Smart Life Business segment handles the finance or payment services, shopping services, and life-related services. It also manages the d market services that include video and music distribution, electronic book store service, and online shopping service. The Other Businesses segment covers the mobile device protection service, machine to machine, system development, sales and maintenance. The company was founded in August 1991 and is headquartered in Tokyo, Japan.