NTT launches 200MW data center campus in Chiba

NTT Group has launched development of what it describes as one of Japan’s largest data center campuses in Chiba Prefecture, with the six-building Tokyo TKY12 complex targeting approximately 200 megawatts of total IT capacity and roughly 250 megawatts in the Inzai-Shiroi area when combined with the nearby 50MW TKY11 facility, as demand from hyperscalers and enterprise clients accelerates across the country’s premier data center corridor.

NTT Data Group announced Thursday that its data center subsidiary, NTT Global Data Center Corp. (NTT GDC), will develop the Tokyo TKY12 Data Center in the Inzai-Shiroi area of Chiba, with first-phase service scheduled to begin in 2030 or later after receiving power from the local utility, the company said. The campus will comprise six buildings and is positioned as a next-generation digital infrastructure hub for both domestic and international hyperscaler clients.

NTT said the facility is planned as one of Japan’s largest campus-style data centers, designed for large-scale and high-density deployments. NTT GDC serves as the group’s centralized investment vehicle for data center construction, ownership, and wholesale infrastructure provision globally, the company said.

The Shiroi site sits at approximately 20 meters above sea level on stable flatland with low disaster risk, offering access to central Tokyo in roughly 60 minutes by rail and to Narita International Airport in approximately 20 minutes, according to the release. The facility is planned adjacent to the Tokyo TKY11 Data Center — a 50MW facility also in the Shiroi area scheduled to enter service in April 2027 — effectively creating a consolidated NTT campus in a region already recognized as Japan’s densest data center cluster.

The TKY12 campus design emphasizes scalability and high-efficiency power and cooling infrastructure to accommodate growth in cloud and artificial intelligence workloads, according to the release.

The Inzai-Shiroi corridor in northwestern Chiba has emerged as the dominant data center hub in Japan, attracting large-scale investments from global cloud providers drawn by its proximity to Tokyo, relatively stable land conditions, and existing fiber connectivity. Industry observers note that land constraints and power availability in central Tokyo have long pushed hyperscale buildouts to suburban clusters, with Inzai-Shiroi becoming the preferred destination.

Demand for large-scale data center capacity in Japan has intensified as domestic and multinational companies expand AI infrastructure, driving competition for suitable sites with sufficient grid power. The ability to secure utility-grade power connections — often a multi-year process in Japan — is widely seen as a key constraint on new developments. NTT said TKY12’s first phase is scheduled to begin service in 2030 or later after receiving power from the local utility.

NTT Data Group has also set climate targets including net-zero direct and indirect emissions from its data center operations by 2030 and across all business activities including offices by 2035, under its NTT DATA NET-ZERO Vision 2040 framework established in June 2023, the company said.

The company said the project is being advanced in coordination with Shiroi City and local communities, with a development model designed to support sustained regional economic growth. NTT GDC said it aims to position the Shiroi-Inzai area as a strategic hub capable of supplying high-quality, sustainable digital infrastructure to global hyperscalers and enterprise customers.

No capital expenditure figures were disclosed in the announcement. NTT Data Group’s overseas data center operations are conducted through NTT DATA, Inc., the company said. IBTimes