Data Centers in Japan

Note: We are not affiliated with the data centers or companies listed below. Listings are compiled from public sources and have not been independently confirmed by us — please verify directly with the company before relying on this information.

Japan hosts roughly 110-120 operational colocation data centers as of 2025, with over 1 GW of operational capacity concentrated among major operators including AT TOKYO, NTT Global Data Centers, Equinix, MC Digital Realty, AirTrunk, Colt Data Centre Services, and IDC Frontier. About 90% of the country’s data center capacity is concentrated in Greater Tokyo and Greater Osaka, with Tokyo alone accounting for roughly 74 existing facilities and dozens more planned. Tokyo’s dominance is anchored by hyperscale campuses such as AirTrunk’s TOK1, which was being expanded by around 40 MW toward a 300 MW campus total as of late 2025, alongside newer entrants like Stack Infrastructure’s TOK01 campus in Inzai and Tokyo Corporation’s 40 MW CC3 facility in Shibaura-Shinagawa. Osaka has been gaining prominence as a secondary hub due to Tokyo’s land, power, and grid-connection constraints — commercial power connections in Tokyo can reportedly take 8-10 years to secure. Since 2024, hyperscalers have committed roughly $27 billion in capital to Japan, and government initiatives such as the ‘Digital Infrastructure Development Plan 2030’ and ‘Regional Revitalization’ program are pushing investment toward Hokkaido, Kyushu, Nagoya, and Yokohama.

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AI Data Centers in Japan

Japan has moved quickly into AI-dense, GPU-heavy infrastructure. SoftBank has built what it describes as Japan's most powerful AI supercomputers on NVIDIA's Blackwell platform, including a DGX SuperPOD using DGX B200 systems, while KDDI is planning a liquid-cooled data center built around GB200 NVL72 racks with Grace Blackwell Superchips. Highreso's dedicated Highreso Kagawa facility runs on NVIDIA H200 GPUs for its GPUSOROBAN AI supercomputer cloud, and SAKURA internet is scaling its Koukaryoku cloud toward roughly 10,800 GPUs, adding HGX B200 Blackwell capacity at its Ishikari data center, which is slated to run on renewable power by 2027. Google Cloud has also introduced Vera Rubin-generation GPUs and Blackwell-based A4/A4X VMs at its first company-owned Japan data center in Inzai, Chiba.

Common Questions

How many data centers are there in Japan and where are they concentrated?

As of 2025, Japan has around 110-120 existing colocation data centers, with a further 46-50 upcoming. Roughly 90% of total capacity sits in Greater Tokyo and Greater Osaka, with Tokyo alone hosting about 74 existing facilities.

Who are the major data center operators in Japan?

Leading operators collectively holding over 1 GW of operational capacity include AT TOKYO, NTT Global Data Centers, Equinix, MC Digital Realty, AirTrunk, Colt Data Centre Services, and IDC Frontier, alongside colocation players like KDDI Telehouse and Digital Edge.

Is Japan building AI-optimized, GPU-dense data center infrastructure?

Yes. SoftBank has deployed NVIDIA Blackwell-based DGX SuperPOD systems, KDDI is planning a liquid-cooled facility built around NVIDIA GB200 NVL72 racks, and Highreso's dedicated Kagawa AI data center runs on NVIDIA H200 GPUs. SAKURA internet is also expanding its Ishikari facility with NVIDIA HGX B200 Blackwell infrastructure and roughly 10,800 GPUs, targeting full renewable power by 2027.

Why is Osaka becoming a bigger data center market?

Osaka's growth is driven by constraints in Tokyo — including land scarcity, power grid limits, and long connection lead times — pushing hyperscalers and colocation developers toward Osaka's more available land and power capacity, with Tokyo and Osaka together accounting for over 60% of Japan's upcoming power capacity pipeline as of 2025.

What government support exists for Japan's data center industry?

Japan's METI has allocated roughly ¥114.6 billion ($740 million) to six local cloud providers to build domestic capacity, while broader programs like the 'Digital Infrastructure Development Plan 2030' aim to redistribute data center growth toward regions such as Hokkaido and Kyushu to reduce disaster-risk concentration in Tokyo and Osaka.

Are there colocation providers in Japan?

Yes — we've identified 19 colocation providers with a presence in Japan. See the company list above, and contact a provider directly to confirm current availability.

Are there cloud providers in Japan?

Yes — we've identified 8 cloud providers with a presence in Japan. See the company list above, and contact a provider directly to confirm current availability.

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Disclaimer: This page was compiled with a structured research and verification process from publicly available sources. A human decides whether each page is published, but individual facts — addresses, contact details, and whether a company operates in a given location — are not independently fact-checked by us. Where you see a “Verified” badge, it means multiple independent sources agreed, not that we personally confirmed it. Companies open, close, relocate, and change contact details without always updating public records, so treat everything here as a starting point, not a confirmed source. If you're making a business decision, verify directly with the provider. Notice something outdated or incorrect? You're welcome to let us know — this site is updated periodically.

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