Japan Plans AI Data Center to Rival OpenAI Stargate

Japan is preparing to build one of the world’s largest data center hubs as demand for AI computing power surges. A new project in western Japan could rival OpenAI’s Stargate initiative in scale.

Japan targets AI demand with major data center project

Japan is planning its largest data center development to date to support growing demand for artificial intelligence and cloud computing. The project will be built in Nanto, a city in Toyama prefecture near the Sea of Japan coast.

Local officials are working with private developer GigaStream Toyama. Together, they plan a campus with a total power capacity of 3.1 gigawatts. According to documents seen by Reuters, this would make Nanto Japan’s third major data center hub. Once completed, the facility would rank among the largest data centers globally. Its scale compares to OpenAI’s Stargate project, which targets 10 gigawatts of capacity and carries an estimated cost of $500 billion.

Japan’s data center capacity is currently concentrated in Tokyo and Osaka. Around 85 percent of existing facilities sit in those two regions. The government has pushed to diversify locations to reduce congestion and infrastructure strain.

However, finding suitable sites outside major metro areas has proven difficult. Nanto offers a strategic alternative. The city lies roughly 250 kilometers from both Tokyo and Osaka, close enough to serve major population centers without adding pressure to them.

Why Nanto stands out as a location

One of Nanto’s key advantages is safety. Toyama prefecture ranks among the regions with the fewest major earthquakes, according to the Japan Meteorological Agency.

Power availability is another major factor. The first phase of the Nanto Campus will support around 400 megawatts of capacity. That matches the scale of some of Japan’s largest recently announced data centers.

The site is designed to accommodate major cloud and technology companies, including Amazon, Microsoft, and Google. Construction is expected to progress in stages, with operations planned to begin by the end of 2028.

GigaStream Toyama prepares global promotion

GigaStream Toyama specializes in preparing infrastructure for data center operators. Its approach mirrors that of U.S.-based firms such as Lancium and Tract. The company plans to promote the Nanto Campus at next month’s Pacific Telecommunications Council conference in Honolulu.

Daniel Cox, who leads GigaStream Toyama, brings more than 25 years of experience in Japan’s real estate investment market. Officials from both Nanto city and GigaStream Toyama declined to comment ahead of a formal announcement expected later this week, according to Reuters.

Japan’s data center market grows rapidly

Demand from cloud computing and artificial intelligence continues to drive strong growth. IDC Japan forecasts the country’s data center market will nearly double to more than 5 trillion yen, or about $32 billion, by 2028. The government views the sector as key to its broader economic strategy. Japan aims to attract 120 trillion yen in foreign direct investment by 2030, up from 53.3 trillion yen in 2024.

Western Japan offers another advantage. Electricity is generally more abundant and cheaper than in the east. The region is served by multiple utilities, including Hokuriku Electric Power, Kansai Electric Power, and Electric Power Development.

As global tech companies race to secure computing capacity for AI workloads, Japan is positioning itself as a competitive alternative to existing data center hubs in the United States and Europe, leveraging stable infrastructure and reliable energy supply.