The UK and Japan have signed an offshore wind industrial compact covering floating foundations, technology demonstrations, turbine supply chains and investment cooperation in both markets. The agreement adds a framework for industrial delivery to an existing bilateral relationship that has already involved developers, research bodies and public agencies.
The compact was signed on 10 November by Michael Shanks, the UK’s Minister of State for Energy, and Takagi Kei, Japan’s State Minister of Economy, Trade and Industry. On the British side, the Department for Energy Security and Net Zero will work with Great British Energy on implementation, while Japan’s Ministry of Economy, Trade and Industry will lead its side of the arrangement.
The compact sets out four areas for joint work: investment in offshore projects, floating and deepwater technology demonstrations, the development of resilient turbine and component supply chains, and policy exchanges supporting Japan’s offshore market. Delivery will depend on subsequent commercial, regulatory and technical decisions, with the document itself setting no new construction contract or committed funding allocation.
Floating wind technology is a prominent element because it allows turbines to operate in deeper water than would normally be economical for conventional fixed-bottom foundations. The turbine and supporting platform remain connected to the seabed through mooring and anchoring systems, while electricity is exported through cables designed to accommodate movement. Each of those elements adds engineering demands that differ from a fixed foundation installed in shallower water.
The foundation and mooring arrangement must manage wind, wave and current loads while controlling movement sufficiently to keep the turbine operating within its design limits. Floating platforms also change the demands placed on installation vessels, ports, towing methods, dynamic cables and inspection services. The compact therefore concentrates on demonstration and shared technical learning as much as on the turbines themselves.
The governments intend to share findings from future foundation and substructure tests and explore where common technical approaches could support deployment. More consistent design and verification methods could help suppliers adapt equipment to different seabed, environmental and port conditions. Any standardisation would still need to account for individual project loads and the different requirements of floating platform concepts; the compact leaves particular standards and foundation types open.
Cooperation between the UK’s Offshore Renewable Energy Catapult and Japan’s Floating Offshore Wind Technology Research Association provides a research route for that work. The European Marine Energy Centre has also participated in discussions on testing facilities. The compact builds on these links and identifies subsea engineering, robotics and digitalisation as additional areas where companies and research organisations may cooperate.
Subsea inspection and digital monitoring are technically relevant because access to mooring lines, anchors and cable interfaces can be limited by depth, sea state and weather windows. Sensors can provide information on structural loads and movement, while remotely operated inspection systems can help assess submerged assets. The bilateral work may support testing and supplier collaboration in these fields, although specific equipment procurement remains to be determined.
Floating wind development may also create opportunities to fabricate large steel structures, modular components, turbine equipment, electrical systems and port handling infrastructure. Britain brings experience in offshore project delivery and established marine engineering services; Japan offers major industrial and manufacturing capabilities. Both countries say they want closer participation by companies in each other’s project pipelines, particularly as fixed-bottom turbine technologies are adapted for floating applications.
The compact also encourages collaboration among offshore wind developers, financial institutions and Great British Energy. It cites existing commercial activity, including JERA Nex bp, while leaving future investment decisions to the organisations and project approval processes concerned. Manufacturers considering new tooling or fabrication capacity will depend on the volume and timing of project orders emerging from those arrangements.
Japan is also seeking to develop its domestic fixed-bottom market, and the UK has agreed to share experience on offshore wind financing, auctions, regulatory frameworks, grid operation, skills and certification. Those subjects affect industrial deployment because developers require a route to market and grid connection while manufacturers need sufficient confidence in future orders to invest in production equipment and workforce capacity.
Officials propose annual director-level discussions, including through the UK-Japan Energy and Climate Dialogue, to oversee cooperation. The compact follows the March 2025 memorandum of cooperation and further bilateral discussions in February 2026. Its first practical outputs will depend on decisions by researchers, project developers, equipment suppliers and the agencies responsible for market and grid arrangements.
