NTT Facilities Inc. (株式会社エヌ・ティ・ティ・ファシリティーズ in Japanese) is an architecture firm headquartered in Minato, Tokyo. It started as the old NTT's Architecture and Engineering department and was incorporated as a wholly owned subsidiary of NTT in 1992.

Japan

• NTT Facilities Research Institute (100%)
• NTT Facilities FM Assist (100%)
• NTT Intelligent Planning and Development Corporation (100%)
• NTT GP-ECOcommunication, Inc. (75%)
• Ennet (40%)

USA

• NTT Facilities USA (100%)
• Electronic Environments Corporation (60%)

China

• NTT設施工程設計（北京） (100%)

Singapore

• Pro-Matrix (51%)

Thai

• Unitrio Technology (49%)

• Omiya Ardija (Japanese football clubs formerly affiliated with NTT)
• NHK Symphony Orchestra

NTT and its Group companies:

• NTT Communications (NTT Europe, etc.)
• NTT Docomo
• NTT Data
• NTT Comware

• NTT FACILITIES Company Profile

• NTT FACILITIES