Organization of Nippon Telegraph and Telephone Corporation

• Chairman
• President

• Corporate Strategy Planning Office
• Reorganization Office
• Transitional Accounts Office

• NTT-Holding Provisional Headqarters
  • Department 1
  • Department 2
  • Department 3
  • Department 4
  • Department 5
  • Cyber Communications Laboratory Group
    • Cyber Solutions Laboratories
    • Cyber Space Laboratories
  • Information Sharing Laboratory Group
    • Service Integration Laboratories
    • Information Sharing Platform Laboratories
    • Network Service Systems Laboratories
    • Access Network Service Systems Laboratories
  • Science & Core Technology Laboratory Group
    • Network Innovation Laboratories
    • Lifestyle and Environmental Technology Laboratories
    • Telecommunications Energy Laboratories
    • Photonics Laboratories
    • Communication Science Laboratories
    • Basic Research Laboratories
  • Intellectual property Center

• NTT-East Provisional Headqarters
  • Corporate Strategy Planning Department
  • Technology Department
  • Legal and Internal Audit Department
  • General Affairs Department
  • Personnel Department
  • Accounts and Finace Department
  • Interconnection Promotion Department
  • Marketing and Support Department
  • Customer Service Department
  • Plant Planning Department
  • Maintenance and Service Operation Department
  • Leased Circuit Services Center
  • Engineering and Technology Suppourt Center
  • Research and Development Center
  • Network Operation Center
  • Procurement and Supply Center
  • Training Institute
  • Payroll Operations Center
  • Medical & Health Administration Center
  • Pension and Health Insurance Center
  • Branch
    • Tokyo Branch
    • Kanagawa Branch
    • Chiba Branch
    • Saitama Branch
    • Ibaraki Branch
    • Tochigi Branch
    • Gunma Branch
    • Yamanashi Branch
    • Nagano Branch
    • Niigata Branch
    • Miyagi Branch
    • Fukushima Branch
    • Iwate Branch
    • Aomori Branch
    • Yamagata Branch
    • Akita Branch
    • Hokkaido Branch
  • Business Communications Headqarters
  • Public Telephone Services Division
  • Customer Promises Equipment Business Division
  • Telegram Services Division

• NTT-West Provisional Headqarters
  • Corporate Strategy Planning Department
  • Technology Department
  • Legal and Internal Audit Department
  • General Affairs Department
  • Personnel Department
  • Accounts and Finace Department
  • Interconnection Promotion Department
  • Marketing and Support Department
  • Customer Service Department
  • Plant Planning Department
  • Maintenance and Service Operation Department
  • Leased Circuit Services Center
  • Engineering and Technology Suppourt Center
  • Research and Development Center
  • Netowrk Operation Center
  • Procurement and Supply Center
  • Training Institute
  • Payroll Operations Center
  • Medical & Health Administration Center
  • Branch
    • Osaka Branch
    • Kyoto Branch
    • Kobe Branch
    • Nara Branch
    • Shiga Branch
    • Wakayama Branch
    • Nagoya Branch
    • Shizuoka Branch
    • Gifu Branch
    • Mie Branch
    • Kanazawa Branch
    • Toyama Branch
    • Fukui Branch
    • Hiroshima Branch
    • Tottori Branch
    • Shimane Branch
    • Okayama Branch
    • Yamaguchi Branch
    • Ehime Branch
    • Kagawa Branch
    • Tokushima Branch
    • Kochi Branch
    • Fukuoka Branch
    • Saga Branch
    • Nagasaki Branch
    • Kumamoto Branch
    • Oita Branch
    • Miyazaki Branch
    • Kagoshima Branch
    • Okinawa Branch
  • Business Communications Headqarters
  • Public Telephone Services Division
  • Customer Promises Equipment Business Division
  • Telegram Services Division

• NTT-Long Distance and Global Provisional Headqarters
  • Corporate Planning Department
  • Technology Department
  • Legal and Internal Audit Department
  • General Affairs Department
  • Personnel Department
  • Accounts and Finace Department
  • Advanced Business Works
  • Media Technology Factory
  • Training Institute
  • Grobal Business Division
  • Solution Business Division
  • Corporate Users Business Division
  • Consumer & Office Users Business Division
  • Network Business Division