AirTrunk Adds $1 Billion to Japan Data Centre Expansion for AI Workloads
Blackstone-backed data centre operator AirTrunk is committing an additional $1 billion to expand its TOK1 hyperscale campus in Inzai, eastern Japan, as demand for infrastructure capable of supporting AI workloads accelerates.
The financing will support the deployment of liquid-cooling technology and the addition of more than 100 MW of IT load at the campus. AirTrunk said construction is already underway to meet near-term demand from cloud and technology customers.
The expansion is being financed through a green loan arranged by major banks including Sumitomo Mitsui Banking Corporation, MUFG Bank and United Overseas Bank.
Liquid Cooling Prepares TOK1 for AI
TOK1 has traditionally supported conventional cloud workloads, but the increasing density of AI computing requires more advanced cooling systems than many traditional data centre deployments.
AirTrunk is therefore introducing liquid cooling to allow the facility to handle higher-density AI workloads. The company expects TOK1 to become one of Japan's first campuses capable of hosting large-scale AI deployments.
The campus already has more than 300 MW of potential capacity. AirTrunk's official site describes TOK1 as a 300+ MW hyperscale campus covering 13 hectares in Inzai, Chiba Prefecture.
Japan Becomes an AI Infrastructure Hub
AirTrunk's expansion reflects growing demand for AI infrastructure across Asia as technology companies require more computing capacity for training and inference.
CEO Robin Khuda said Japan is becoming increasingly important for customers looking for infrastructure in North Asia. He also pointed to constraints on deploying AI infrastructure in the United States and Europe as factors that could benefit Asian markets.
Japan is already a major market for AirTrunk. The company operates four campuses in the country and says its Japanese platform provides more than 430 MW of capacity.
TOK1 Expands Beyond Traditional Cloud
The latest project builds on AirTrunk's earlier investment in TOK1. The campus originally opened in 2021 with more than 60 MW available in its initial phases and was designed to scale beyond 300 MW.
AirTrunk's shift toward liquid-cooled AI infrastructure shows how existing hyperscale facilities are being adapted rather than simply replaced as AI workloads increase. Higher-performance processors generate substantially greater heat density, making cooling technology an increasingly important part of data centre design.
The company now plans to use the expanded TOK1 infrastructure to serve both existing cloud requirements and the next generation of AI workloads, strengthening its position in Japan's rapidly growing data centre market.
