NTT in talks to build Anthropic’s first Japan data center at up to $6.3 billion

NTT Data Group is in advanced negotiations to build Anthropic’s first dedicated data center in Japan. The planned site is in Osaka, and the price tag could reach up to $6.3 billion. The deal is not finalized. But if it closes, Osaka would host one of Japan’s largest computing facilities, measured by processing capacity, built for a single AI developer. What’s on the table The project’s construction cost is projected to top out at up to $6.3 billion. Partial operations are targeted for 2028. Anthropic would be the anchor customer for this site. It would mark the company’s first dedicated data center in Japan, giving it local infrastructure in one of Asia’s largest economies. For NTT, the Osaka project fits into a much bigger construction plan. The company wants to grow its domestic data center IT power capacity from approximately 300 MW to around 1 GW by fiscal year 2033. That expansion is backed by an investment exceeding $9 billion. NTT’s Kansai buildout is already underway In April 2026, the company opened the Kyohanna OSK11 data center in the Kansai area, which it bills as AI-ready. OSK11 has a capacity of 30 MW. NTT is also deploying what it calls the AI-Optimized Wide-area Net...