Digital Realty has opened NRT14, the third data center at its NRT campus in Inzai City, Chiba Prefecture, and says the addition takes the campus's total IT power capacity to close to 100 megawatts.
The building was developed by MC Digital Realty, the 50/50 joint venture the company runs in Japan with Mitsubishi Corporation. It follows NRT10, which opened in 2021, and NRT12, which opened in 2024, on the same site.
Cooling is the part buyers will look at first. NRT14 is built so that liquid cooling and air cooling coexist in the same facility rather than committing the whole hall to one approach, and it is rated for high-density colocation of up to 150kW per rack. Digital Realty says the design supports workloads above 100kW and names high-performance computing, machine learning and virtual reality alongside AI training and inference.
The facility is one of the first in Japan to hold the DGX-Ready Data Center certification, a third-party check that a hall can host dense GPU systems.
"The country's rapidly increasing demand for AI training and inference deployments requires scalable, flexible, and highly connected data centers in the Tokyo metropolitan area," said Serene Nah, Managing Director and Head of Asia Pacific at Digital Realty. What the statement leaves out is the building's own IT capacity, which is not broken out from the campus figure, and its floor area, which is not published at all.
Kohei Yamashita, Representative Director and Chief Executive Officer of MC Digital Realty, said: "The rapid adoption of generative AI and cloud services is driving significant demand for data centers with high-density power capacity, advanced cooling, and reliable operations."
Timing deserves a closer read. The announcement is framed as an opening, but Yamashita's own words in it are "We are pleased to announce the upcoming opening of NRT14, which will be our third facility at the NRT campus," and several of the platform features are described in the future tense. No ready-for-service date is given. A signed commissioning date, or a first-customer move-in, would settle whether capacity can be contracted now or later this year.
Other specifications a shortlist would normally turn on are also absent. Digital Realty has not published the rack count, a design PUE, pricing, or the liquid cooling method at the rack, which matters because direct-to-chip and rear-door heat exchangers impose very different plumbing and different obligations on the tenant's own hardware.
On energy, the claim is a matching claim rather than on-site supply. Electricity used in the colocation data hall will be matched with 100 percent renewable energy through the purchase of non-fossil fuel certificates, which is the same arrangement MC Digital Realty applies at its existing sites.
Interconnection is the argument for taking space here rather than in a standalone building. Racks can be expanded across the whole NRT campus over the Campus Connect service without regard to which building they sit in, and Digital Realty says NRT14 will be enabled for ServiceFabric, its orchestration platform, which reaches the KIX campus in Osaka and the rest of its estate.
For buyers sizing GPU deployments in the Tokyo metropolitan area, NRT14 is one of the few halls in that market quoting 150kW per rack without requiring a whole-room commitment to liquid. The specifications that will decide whether it fits a given deployment are precisely the ones still missing from the announcement: the building's own IT capacity, the liquid cooling method at the rack, and a firm service-ready date.
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