NTT Data nears 6.3 billion dollar deal to build Anthropic's first dedicated Japan data center

NTT Data Group is in the final stages of talks to build a large data center in Osaka prefecture in western Japan for Anthropic, the United States artificial intelligence developer behind the Claude family of models, according to a report from Nikkei Asia. Nikkei Asia reported on October 13, 2026 that the facility would be Anthropic's first dedicated data center in Japan and that it would have one of the largest processing capacities in the country. The article, written by Kosuke Shimizu, Katsuyuki Tanimoto and Shugo Tamura, cites multiple unnamed sources and puts the possible construction cost at about 1 trillion yen, which is approximately 6.3 billion United States dollars.

Japan has become one of the most closely watched data center markets in Asia, as cloud providers, chipmakers and model developers compete for land, electricity and construction capacity. The country's installed data center power base stood at roughly 3.57 thousand megawatts in 2026, a figure that market researchers expect to roughly triple by the early 2030s. Demand comes from domestic manufacturers adopting AI tools, from Japanese technology groups building their own large language models, and from United States laboratories that want to serve Japanese enterprise customers from inside the country.

Anthropic has been assembling capacity across Asia throughout 2026. The company announced its first Australian lease in September 2026, a site in Western Queensland targeting 2.16 gigawatts that could come online in 2027. It also confidentially filed for an initial public offering with the United States Securities and Exchange Commission in June, a filing in which it disclosed long term computing and infrastructure commitments worth 518 billion dollars. For a company of that scale, a dedicated site in Osaka would be less an experiment than a piece of industrial plumbing: a fixed base from which to serve Japanese banks, manufacturers and public sector customers under local data rules.

NTT Data Group, the information technology services arm of the Japanese telecommunications giant, already operates more than 2 gigawatts of critical information technology load across more than 20 countries, and its facilities in Japan and the wider Asia Pacific region, Latin America and Europe exceed 1,600 megawatts of combined capacity. Neither NTT Data nor Anthropic would confirm that talks are under way, and no agreement has been signed. The story therefore sits in an unusual space: detailed enough to move supplier expectations and utility planning conversations, but not yet a contract.

Key Facts

The reported numbers are large by Japanese standards. Nikkei Asia puts the construction cost at about 1 trillion yen, or roughly 6.3 billion dollars, and notes that servers and graphics processing units would be paid for separately, pushing total investment into the several trillion yen range. Total power intake capacity is reported at up to 500 megawatts. Reuters reported on October 13, 2026 that the cost and power figures would place the site among the largest data centers in Japan if it is built as described.

Data Centre Magazine reported on October 13, 2026 that NTT Data is in the final stages of talks to build the Osaka prefecture facility for Anthropic, citing multiple unnamed sources via Nikkei Asia, and that the deal would give Anthropic a bespoke base for its Japanese operations. W.Media reported on October 13, 2026 that the project is expected to have 500 megawatts of power capacity and that neither company has made an official statement.

The timetable is tight but not unrealistic. The two companies aim to conclude negotiations by the end of NTT's fiscal 2026, which ends in March 2027, with partial operations targeted for as early as 2028. That sequence implies site preparation, substation work and building construction beginning well before any final paperwork is signed, a pattern that has become common in the AI infrastructure boom, where speed of delivery is itself a competitive asset.

Electricity, not land or capital, appears to be the hardest part. Securing 500 megawatts from the conventional grid in the Kansai region would take considerable time, so on site power generation and fuel cells are being considered as initial alternatives. That detail matters because it suggests the first phase of the site may run on captive generation, with grid interconnection following later as capacity is added.

Other figures frame the moment. The market research firm Mordor Intelligence projects Japan's data center market growing from 11.89 billion dollars in 2026 to 17.66 billion dollars by 2030, with power expanding from 3.57 thousand megawatts toward 11.17 thousand megawatts by 2031. Anthropic's disclosed infrastructure commitments of 518 billion dollars, and its 2.16 gigawatt Australian lease announced in September 2026, show that the Osaka project would be one entry in a much larger global portfolio.

Analysis

What this really means is that the constraint on AI expansion in Japan has shifted decisively from chips to electricity and construction capacity. A 500 megawatt requirement is not a data center specification in the ordinary sense; it is a power purchase problem, an interconnection queue problem and a land assembly problem wrapped together. The reported decision to look at on site generation and fuel cells before grid supply is available tells you that Anthropic and NTT Data would rather run expensive early power than wait for a utility timeline they do not control.

The bigger picture here is the outsourcing of AI capital expenditure to infrastructure incumbents. NTT Data does not build models; it builds buildings, cooling systems and network links, and it has done so in more than 20 countries. Anthropic does not want to become a real estate and power developer. The reported structure, in which NTT Data constructs and operates the site while Anthropic consumes the compute, mirrors arrangements that cloud providers have used for years and that AI laboratories are now adopting because balance sheets and permitting expertise sit with the operators.

There is also a regulatory dimension. A dedicated facility in Osaka prefecture would let an American AI developer keep Japanese data inside Japan, which matters for banks, healthcare providers and government agencies weighing cross border transfer rules.

The judgement has to be qualified, because the talks are not signed. Nikkei Asia's sourcing is anonymous, both companies declined to confirm, and large infrastructure negotiations can collapse over power tariffs, land prices or the terms of the operating contract. Even so, the reported figures are specific enough, down to the fiscal deadline and the 2028 operations target, that suppliers and utilities will start planning around them.

Why It Matters

For Japan, the project would be a test of whether the country can convert its industrial base and grid investment into AI hosting capacity at a time when its electricity system is already being reshaped by the restart of nuclear plants and the build out of renewables. If 500 megawatts cannot be delivered on a commercially sensible schedule, that is a signal about the wider pipeline of announced projects, not just about one site in Osaka.

For Anthropic, a dedicated Japanese site would deepen its presence in a market where enterprise adoption is growing and where local hosting is often a procurement requirement. It would also add another line to the infrastructure commitments disclosed in its June filing, at a moment when investors preparing for a public listing are paying close attention to how much the company has promised to spend on computing.

For NTT Data, the deal would extend an already large footprint and tie a services business more tightly to AI demand. Operators that can deliver power and capacity quickly are becoming strategic suppliers to the model developers, and that relationship carries pricing power that traditional outsourcing contracts do not.

Next Up

The first thing to watch is confirmation. A signed agreement is targeted by the end of NTT's fiscal 2026, which ends in March 2027, and any official statement from either company would settle the outstanding questions about scope, ownership and power procurement. Watch also for announcements about generation equipment, fuel cell suppliers and substation work in Osaka prefecture, because those would indicate that construction is moving ahead before the contract is finalised.

Beyond this project, the wider question is whether other AI developers follow the same route into Japan and whether Anthropic's Australian site in Western Queensland, announced in September 2026, progresses toward its targeted 2027 online date. Both projects will be read as evidence about how quickly 500 megawatt class facilities can actually be built in the Asia Pacific region.