PRESS RELEASE
The University of Tokyo and Fujitsu launch trial for Japan's first cloud-connected inter-regional workload shift based on power grid conditions
The University of Tokyo
Fujitsu Limited
Tokyo and Kawasaki, Japan, December 24, 2025
The University of Tokyo (UTokyo) and Fujitsu Limited today announced the commencement of a trial on inter-regional workload shifting between data centers. This initiative is part of the Watt-Bit Collaboration Project, which aims to optimize electricity supply and demand by integrating and operating power and communication systems in response to the increasing power consumption of data centers driven by AI demand. The trial will run from January 5, 2026, to March 31, 2026.
This trial is a technical verification toward the realization of the Watt-Bit Collaboration Project for Green Transformation, which the UTokyo announced with TEPCO Power Grid in October 2025. Moving forward, the partners aim to build a carbon-neutral and sustainable infrastructure and contribute to green transformation by actively utilizing renewable energy to meet electricity demand.
The two organizations will collaborate with national and related bodies to expand connected locations and plan additional verifications, including the utilization of APN (All Photonics Network), the next-generation communication infrastructure. Through open innovation and collaboration across industry, government, and academia, the organizations will develop technologies to realize a sovereign distributed data center concept ensuring data and operational sovereignty primarily in regions surrounding renewable energy sources, thereby contributing to the development of sustainable public infrastructure.
UTokyo's Center for Strategic Promotion of Green Transformation (GX) has previously promoted the introduction of renewable energy, the spatial and temporal understanding of electricity consumption, and conducted trials on workload shifting based on electricity price differences between regions. In addition to these efforts, UTokyo will proceed with the integrated visualization of campus-wide electricity consumption and carbon footprint, the utilization of energy data such as from power grids, and the optimization of electricity consumption within the campus across facilities and equipment, including workload shifting, and further utilization of renewable energy.
Fujitsu aims to advance the social implementation of the Watt-Bit Collaboration and make the world more sustainable by providing the sovereign cloud solution Fujitsu Cloud Service powered by Oracle Alloy and cloud-native technologies including containers, which are essential for distributed data centers.
Overview of the Trial
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Trial Period
January 5, 2026, to March 31, 2026
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Details
The 'Fujitsu Cloud Service powered by Oracle Alloy' computing environment, which is confidential, meets sovereign requirements, and enables secure and seamless connection with on-premises systems, operates at the University of Tokyo Kashiwa Campus Information Technology Center and Fujitsu’s data center in Japan. This trial will verify whether it can perform computations irrespective of location using container technology. With the cooperation of an electric utility, the effectiveness of inter-regional workload shifting linked to power grid conditions, such as grid load status and electricity market prices, will also be verified.
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Roles
UTokyo: Provision of supercomputer systems at the Information Technology Center and workload use cases related to AI research.
Fujitsu: Integration of workload shifting using container technology and provision of Fujitsu Cloud Service powered by Oracle Alloy.
Background
In recent years, the surge in AI demand has led to a rapid increase in power consumption by data centers due to the growing volume of computational processing. Traditional data centers are often concentrated in urban areas, leading to challenges such as strained power supply and demand, and risks during large-scale disasters.
Furthermore, from the perspective of rising global energy supply chain risks and energy security, there is a need to optimize demand around decarbonized power sources.
Against this backdrop, it is essential to decentralize data centers, particularly around renewable energy, and optimize the balance of electricity supply and demand based on power grid conditions. These efforts will also maximize the utilization of renewable energy, contributing to Japan's 2050 carbon neutrality declaration and the goal of a 60% reduction in greenhouse gas emissions by 2035 compared to 2013 levels, as submitted to the United Nations.
Press Contacts
The University of Tokyo
Fujitsu Limited
All company or product names mentioned herein are trademarks or registered trademarks of their respective owners. Information provided in this press release is accurate at time of publication and is subject to change without advance notice.
Date: 24 December, 2025
City: Tokyo and Kawasaki, Japan
Company: The University of Tokyo, Fujitsu Limited