ST Telemedia Global Data Centres (STT GDC) has officially launched STT Tokyo 1, its first data centre facility in Japan. Located in Inzai City, Greater Tokyo, the new development strengthens the company’s presence in Northeast Asia and forms part of its ongoing global expansion.
First phase of a major data centre campus
STT Tokyo 1 is the first of two buildings planned within a campus situated in the Goodman Business Park. Once complete, the full campus will support up to 70 megawatts of IT capacity. STT Tokyo 1 alone will deliver up to 32 megawatts when fully operational, spanning a total gross floor area of 60,000 square metres.
Kiyoshi Maeda, Chief Executive Officer – Japan at ST Telemedia Global Data Centres, said, “STT Tokyo 1 reflects the best of STT GDC’s global expertise that we are bringing to Japan – operational excellence, future-ready infrastructure, and sustainability embedded by design. As Japan’s digital transformation accelerates, this facility will offer customers the performance and reliability they need to unlock the full potential of their applications and data. We are proud to play a role in elevating the country’s digital ambitions to greater heights.”
Sustainability and high performance built in
The facility is designed to meet both operational and sustainability goals, incorporating energy-efficient infrastructure from the outset. It follows the Japan Data Centre Council (JDCC) guidelines, aligning with local requirements for secure and efficient digital infrastructure. STT Tokyo 1 is also targeting carbon-neutral operations from day one for Scope 1 and Scope 2 emissions.
A behind-the-meter solar photovoltaic system powers key functions, including façade lighting, EV charging stations, and water pumps. The site has also implemented a renewable energy purchase programme to support long-term sustainability targets. According to STT GDC, the energy efficiency efforts have enabled the facility to achieve a world-class power usage effectiveness (PUE) rating.
In 2024, STT Tokyo 1 became one of the first data centres worldwide to obtain the TIA-942-C Design Certification. This international standard validates the facility’s redundancy, high availability, and physical security—core criteria for hyperscalers and enterprise customers.
Addressing demand in Japan’s growing data market
To ensure reliability, the facility operates using a 66kV dual-feed utility intake supported by an on-site substation. This setup allows seamless switching between power sources, maintaining continuous service for customers with mission-critical workloads.
The opening of STT Tokyo 1 comes as Japan’s data centre market experiences strong growth. According to IDC Japan, the market is expected to expand from 2.74 trillion yen in 2023 to 5.08 trillion yen (US$34.6 billion) by 2028. This growth is driven by increased adoption of cloud services, rising demand for AI applications, outsourced IT operations, and a broader push for data localisation.
In addition, Japan is set to add eight new submarine cables to its existing 40 between 2025 and 2027. These infrastructure upgrades are expected to further enhance high-speed connectivity, reduce latency, and support the bandwidth needs of Japan’s evolving digital economy—needs that STT Tokyo 1 aims to fulfil.
