AirTrunk TOJ1 Inzai Campus
Massive 300 MW hyperscale mega-campus powering Tokyo's AI and cloud growth in Inzai
The story
Located in Inzai City, Chiba Prefecture—Japan's preeminent data center cluster—AirTrunk TOJ1 is a colossal 300 MW hyperscale campus built on a plateau of solid Pleistocene bedrock chosen for its seismic resilience. Designed to support massive cloud availability zones and high-density AI clusters serving the greater Tokyo metropolitan area, TOJ1 deploys modular architecture and water-efficient cooling to achieve a market-leading PUE of 1.15.
Notable
- Largest hyperscale data center campus in Japan with over 300 MW of utility capacity.
- Located on seismically stable solid ground in Inzai City, Chiba, outside Tokyo flood zones.
- Anchors cloud availability zones for major hyperscalers including AWS, Microsoft, and Google.
- Utilizes high-efficiency indirect evaporative cooling to achieve design PUE of 1.15.
Expansions
- 2021: initial 60 MW phase opened in Inzai Chiba data center hub
- 2023: full expansion completed to over 300 MW total campus capacity
Sources
- AirTrunk TOJ1 Tokyo Inzai Hyperscale Campus · AirTrunk · 2023-02-14
- AirTrunk opens first data center in Japan, a 300MW campus in Tokyo · Data Center Dynamics · 2021-11-17
Part of the open famous data centers dataset (CC BY 4.0). Updated 2026-10-15. A correction? da@mustardseedmt.com
What is AirTrunk TOJ1 Inzai Campus famous for?
Massive 300 MW hyperscale mega-campus powering Tokyo's AI and cloud growth in Inzai
Where is AirTrunk TOJ1 Inzai Campus?
AirTrunk TOJ1 Inzai Campus is in Inzai, Chiba Prefecture, Japan (35.808, 140.165). It is operated by AirTrunk.
How much power does AirTrunk TOJ1 Inzai Campus use?
About 250 MW of IT load and 300 MW in total, according to the sources listed on this page.
What is the PUE of AirTrunk TOJ1 Inzai Campus?
1.15, reported.