The financing will support the continued development of the TOK1 facility, which is designed to scale to more than 300MW of capacity to support cloud and AI workloads. The deal highlights the growing importance of hyperscale digital infrastructure as Japan accelerates the adoption of cloud computing and AI technologies.

The loan was structured under AirTrunk’s Green Financing Framework and will refinance existing facilities while funding further development phases at the campus. The company recently began construction to add more than 100MW of additional IT load at TOK1 to meet near-term customer demand.

The transaction was led by Sumitomo Mitsui Banking Corporation, MUFG Bank, Crédit Agricole CIB and Société Générale as global coordinators. In total, 12 banks participated as mandated lead arrangers and bookrunners, reflecting strong lender appetite for large-scale digital infrastructure projects in Japan.

AirTrunk founder and CEO, Robin Khuda, said: “Japan is one of the world’s most important cloud and AI markets, and we’re committed to building the digital infrastructure that enables its long-term growth. AirTrunk has been investing deeply in Japan for this reason – to build the hyperscale platform that will underpin the country’s digital future and connect it to the broader region. This landmark financing enables us to accelerate the expansion of TOK1 and continue delivering the capacity our customers need today, while preparing Japan for the extraordinary compute demands ahead.”

The financing forms part of AirTrunk’s broader expansion in Japan. The company recently announced OSK2, its second hyperscale data centre in Osaka, alongside a new national headquarters. With these developments, AirTrunk’s total investment in Japan has exceeded US$8bn (approximately JP¥1.2tn).

At full build-out, AirTrunk’s four Japanese campuses, TOK1, TOK2, OSK1 and OSK2, are expected to deliver around 530MW of total capacity for cloud and AI workloads, creating one of the country’s largest hyperscale platforms.

AirTrunk associate vice president, treasury Japan, Masato Hori, said: “This is the largest data centre financing ever completed in Japan and a testament to the deep collaboration between AirTrunk and our banking partners. We’re especially grateful for the strong support from Japan’s leading financial institutions, including SMBC, MUFG, Chiba Bank and Mizuho Bank.”

The facility also aligns with Japan’s Green Transformation (GX) strategy, which aims to mobilise ¥150tn in public and private investment to accelerate decarbonisation and next-generation infrastructure development. AirTrunk said the financing supports energy-efficient data centre operations and contributes to its goal of reaching net zero Scope 1 and 2 emissions by 2030.

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