AirTrunk OSK2 (East Osaka)
Status: Live / Operational (Initial Phase) | Location: East Osaka, Kansai Region, Japan
Project Overview
The official commissioning of AirTrunk OSK2 in December 2025 marks a massive strategic victory for the Australian hyperscale giant in the Japanese market. Located in East Osaka, OSK2 is a purpose-built 110 MW facility designed to provide regional diversity to the Kansai area, complementing the existing OSK1 site in West Osaka. This launch is a cornerstone of AirTrunk’s broader mission to scale its Japan footprint to over 530 MW, making it one of the largest non-domestic operators in the country. Advanced Cooling for the Generative AI Surge
OSK2 is not merely a capacity play; it is a specialized response to the 2025 surge in Generative AI adoption across Northeast Asia. To accommodate the latest generation of NVIDIA Blackwell and Hopper-based GPU clusters, AirTrunk has deployed a hybrid cooling architecture. The facility is equipped with Direct-to-Chip Liquid Cooling capabilities, allowing it to manage the extreme thermal loads produced by 70kW+ racks. This high-density engineering enables OSK2 to achieve an industry-leading PUE of 1.15, ensuring that massive AI workloads can be processed with minimal energy waste a critical factor given Japan's stringent energy efficiency targets. Regional Resilience and Connectivity
By establishing a major presence in East Osaka, AirTrunk provides much-needed geographic redundancy for global cloud service providers (CSPs) who have historically been concentrated in Tokyo. OSK2 acts as a high-speed gateway, connecting the Kansai region directly to global digital markets via subsea cables landing in the nearby Shima and Toyohashi stations
Quick Facts
| Field | Value |
|---|
| Project Name | AirTrunk OSK2 (East Osaka) |
| Location | East Osaka, Kansai Region, Japan |
| Status | Live / Operational (Initial Phase) |
| Commissioning | December 2025 |
| Total IT Load | 110 MW |
| Total Capacity | 530 MW (AirTrunk Japan Portfolio Total) |
| Tier Level | Tier III+ Equivalent |
| Project Type | Hyperscale / AI-Optimized Colocation |
City Profile
| Header | Details |
|---|
| City Name | Osaka (Kansai Region) |
| Population | ~2.7 Million (City) |
| Urban Agglomeration | ~19 Million (Keihanshin Metro) |
| City GDP | ~$186 Billion (City-wide) |
| Per Capita Income | ~$40,000 |
| City Tier | Global Tier 1 / Regional Tech Hub |
| Key Strengths | Key gateway for Western Japan, subsea cable landing, Society 5.0 initiative. |
Companies Involved
| Header | Details |
|---|
| Developer / Operator | AirTrunk (Backed by Blackstone/CPP Investments) |
| Strategic Infrastructure Partner | NVIDIA (Infrastructure Alliance) |
| Construction Contractor | Obayashi Corporation / Regional Partners |
| MEP Engineering | AECOM / Aurecon |
| Network Connectivity | Equinix Fabric, Colt, NTT Communications |
| Power Infrastructure | Kansai Electric Power Co. (KEPCO) |
Technical Specifications
| Header | Details |
|---|
| Power Capacity | 110 MW (High-Density ready) |
| UPS Redundancy | N+1 / 2N Configurable |
| Cooling System | Direct-to-Chip Liquid Cooling & Air-cooled Chillers |
| Connectivity | Carrier-neutral; Low-latency Osaka Internet Exchange (OIX) |
| PUE Target | 1.15 |
| Energy Mix | 100% Carbon Neutral (via renewable energy certificates) |
Milestones
| Header | Details |
|---|
| Announcement | Q4 2024 |
| Construction Start | Late 2024 |
| Phase 1 Go-Live | December 2025 |
| Full Buildout | 2027 |
Investment Details
| Header | Details |
|---|
| Total Investment | ~US$650 Million (Phase 1 specific) |
| Funding | Blackstone-led Sustainable Financing |