Hitachi, Brookfield, Hartree and Tokyo Gas have signed a memorandum of understanding to develop green data centers in Japan with on-site power generation and redundant infrastructure, including cooling and power distribution systems. The agreement, signed on September 30, 2026, expands a previous collaboration between Hitachi, Brookfield and Hartree announced in July 2025.
The companies plan to develop a standardized data center model combining on-site power generation as the primary electricity source with battery storage and grid power. The design will incorporate redundancy across cooling equipment, power distribution systems and other infrastructure to maintain operations during equipment failures or fluctuations in electricity supply.
Hitachi will contribute its expertise in designing cooling and power generation facilities for data centers, supplying related equipment and providing maintenance services. The company also offers HMAX Data Center, a suite of solutions using Physical AI to support autonomous and integrated operation of power, IT and cooling infrastructure.
The collaboration will also focus on standardizing and modularizing data center buildings, equipment and on-site power generation facilities. Decarbonization measures under consideration include renewable energy, carbon credits and environmental attributes. Tokyo Gas brings experience in energy infrastructure and its Power Hybrid DC Solution, which combines grid electricity with on-site generation using gas cogeneration systems.
The first projects are planned for Japan’s Kanto and Kyushu regions. The four companies will conduct due diligence and prepare development plans covering facility configurations and business models. They also intend to involve additional partners, including IT companies, manufacturers and financial institutions.
