SoftBank Group Corp: Tokyo Data Center

The Tokyo Data Center is one of the cornerstone facilities in SoftBank Group Corp.’s national digital infrastructure network, operated by SoftBank Corp. in Japan’s capital region. Strategically located in the Tokyo metropolitan area, this facility provides mission-critical infrastructure for SoftBank’s telecommunications, cloud, and AI computing services, supporting enterprise and government clients that require high-availability, low-latency, and secure connectivity.

As Japan’s leading telecom and cloud operator, SoftBank has invested heavily in expanding its Tokyo data center footprint — including the Tokyo No.4 Data Center and other sites across the city’s western suburbs — to meet the country’s growing demand for AI computing, hybrid cloud, and 5G-edge workloads. These facilities also connect directly to SoftBank’s nationwide optical backbone, linking with sister campuses in Osaka (Sakai) and Hokkaido, forming a distributed and resilient data center ecosystem designed for business continuity and digital transformation.

The Tokyo Data Center exemplifies SoftBank’s approach to combining reliability, security, and energy efficiency within Japan’s most competitive and interconnected technology market.

⚙️ Facility Highlights

• Operator: SoftBank Group Corp. (through SoftBank Corp.)
• Location: Tokyo, Japan (exact sites undisclosed; includes “Tokyo No.4 Data Center” per public registry).
• Facility Role: Central hub in SoftBank’s AI, cloud, and network infrastructure network across Japan.
• Power Capacity: Estimated multi-megawatt-class facility (exact figures not disclosed).
• Design Standards: Built to Tier III+ redundancy levels with independent power and cooling paths.
• Cooling Systems: Precision air and liquid cooling optimized for high-density compute racks.
• Energy Efficiency: Implements free-cooling, high-efficiency CRAC systems, and energy reuse designs to minimize PUE.
• Resilience: Seismic isolation and redundant mechanical, electrical, and network systems ensure continuous uptime.
• Integration: Connected to SoftBank’s AI infrastructure network, interlinking Tokyo with Osaka, Hokkaido, and upcoming overseas facilities.

🔐 Security & Compliance

• 24/7 Facility Security: On-site monitoring and surveillance managed by SoftBank’s dedicated security operations team.
• Multi-Layered Access Controls: Biometric authentication, mantrap systems, and restricted floor-level access zones.
• Advanced Surveillance: Continuous CCTV coverage, intrusion detection, and AI-based incident analytics.
• Network & Data Protection: Encrypted backbone connections and integrated DDoS mitigation across SoftBank’s network.
• Power & Cooling Redundancy: Dual power feeds, N+1 UPS architecture, and multi-generator backup.
• Certifications:
• ISO/IEC 27001 — Information Security Management
• ISO 22301 — Business Continuity
• ISO 14001 — Environmental Management
• Operational Resilience: Designed to comply with Japan’s disaster-prevention standards and metropolitan BCP frameworks.

🌐 Connectivity & Carrier Access

• Carrier-Neutral Connectivity: Direct access to Japan’s leading carriers, ISPs, and cloud exchange platforms.
• Network Backbone: Connected via SoftBank’s nationwide optical fiber ring, linking Tokyo, Osaka, and Hokkaido.
• Peering & IX Access: High-speed connections to Tokyo’s major Internet Exchanges — JPIX, BBIX, and Equinix TY sites.
• Cloud On-Ramps: Direct integration with SoftBank Cloud, Oracle Cloud Infrastructure (OCI), AWS, Google Cloud, and Microsoft Azure.
• AI Infrastructure Integration: Supports SoftBank’s domestic AI computing clusters and distributed model training systems.
• Edge & 5G Ecosystem: Key node in SoftBank’s 5G edge computing network providing ultra-low-latency connectivity for IoT and mobile applications.

👥 Who It Serves

The Tokyo Data Center serves as a central hub for SoftBank’s enterprise, AI, and telecom customers — delivering secure, scalable, and high-performance infrastructure.

• Financial Institutions & Enterprises: Mission-critical hosting for regulated and high-availability workloads.
• Cloud & AI Providers: Partners using SoftBank’s backbone for distributed AI model training and cloud compute.
• Government & Public Sector: Secure and compliant infrastructure for data sovereignty and digital services.
• Telecom & Edge Providers: 5G and edge compute deployments requiring low-latency proximity to Japan’s capital.
• Research & Technology Firms: AI development, data analytics, and simulation workloads hosted on GPU-enabled clusters.