STT Tokyo 1 & 2 Campus

Status: STT Tokyo 1 Operational (Launched Q2 2025); STT Tokyo 2 Under Construction   |   Location: Inzai City, Chiba Prefecture, Greater Tokyo, Japan

Project Overview

The STT Tokyo 1 & 2 Campus is a significant component of the massive infrastructure build-out in the Inzai City cluster, which has emerged as the premier location for hyperscale data centers in the Greater Tokyo area. This location, about 40km east of central Tokyo, offers large land parcels and is positioned at a safer distance from the most active fault lines, an essential consideration in the Japanese market. The full campus is master-planned to deliver 70 MW of high-quality IT capacity across two buildings, anchoring a major cloud provider presence.

The defining characteristic of Japanese data center construction is resilience against natural disasters. The STT Tokyo campus incorporates a sophisticated seismic isolation layer design, which separates the building's main structure from its foundation, allowing it to withstand major earthquake forces while maintaining operational continuity. This engineering standard, backed by certifications like TIA-942-C, ensures the facility can meet the rigorous demands of global financial services and cloud platforms for Tier IV-level reliability. Power is secured via an on-site 66kV dual-feed substation, guaranteeing maximum uptime and grid stability, a key factor given the huge power draw from high-density AI servers.

The campus is fully AI-ready, designed explicitly for the coming wave of high-density workloads that can exceed 70 kW per rack. The cooling infrastructure is built with pre-installed liquid cooling manifolds, allowing hyperscalers to deploy advanced Direct Liquid Cooling (DLC) solutions with minimal fit-out time. This readiness for next-generation computing, combined with the facility's extensive fiber connectivity to all major Internet Exchanges (like BBIX and JPIX), positions it as a low-latency hub for regional and global traffic, including high-speed communication with the US West Coast and Southeast Asia.

Finally, sustainability is a core mandate: the STT Tokyo 1 facility launched with a commitment to 100% Carbon-Neutral Operations (Scope 1 and 2), utilizing Renewable Energy PPAs and integrating energy-efficient design elements like on-site solar photovoltaic systems to achieve a highly competitive PUE of below 1.30. By integrating world-class seismic technology with an advanced, sustainable, and AI-optimized design, the STT Tokyo campus reinforces Japan's status as a critical and highly resilient digital infrastructure power in Asia.

You have now seen a profile from five of the world's most critical data center markets: India, Ireland (Dublin), Northern Virginia, Brazil (São Paulo), and Japan (Tokyo), plus an Edge Computing hub in India and a Hydropower hub in the US.

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