Japan to unveil support for struggling offshore wind projects after lessons learned
Japan is preparing a new financing framework aimed at reviving offshore wind schemes that stalled after rounds 2 and 3 of the national auction. The plan centers on stabilizing long-term revenue and reducing the risk profile for capital-intensive projects.
Rising costs across supply chains, currency swings, higher borrowing costs and challenges securing vessels pushed several bids below sustainable levels, threatening the nation’s clean energy ambitions and billions in investment. In response, authorities are exploring additional support to prevent a repeat of early setbacks.
The government intends to retool the auction architecture and reintroduce rounds that stalled, while restarting the longer-term calendar. The centerpiece would be a Long-Term Decarbonisation Auction, a mechanism borrowed from 2023 rules that offered fixed capacity payments for up to two decades in other sectors, designed to de-risk finance and cap windfall profits.
A METI pricing panel is expected to finalize parameters for the LTDA, making it available to rounds 2 and 3 projects. Developers have described the LTDA as a potential lifeline that could make financing more predictable and bankable, especially when paired with prior premium structures.
Most Round 2 and 3 projects are at early stages, with notable exceptions such as a 315 MW development off Akita coast, led by a joint venture including a major utility. The project is moving toward site works, with the first 21 Japanese-built monopiles slated for arrival this autumn and wind turbines expected later in the year. Commercial operation is targeted for the late 2020s, on track for 2027 in some estimates.
Another large Round 3 project, a 600 MW array off the Sea of Japan, is also awaiting the government’s decision on new incentives. Industry figures emphasize that the sector needs a credible delivery track record before discussions on optimization can proceed.
Industry voices stress delivering projects and building credibility as essential steps. Analysts note that early offshore wind in Japan was heavily subsidy-driven and underestimated upfront costs, which has fed into the current caution around pricing and timelines. There is a sense that a more measured approach—emphasizing deliverability, price floors, and non-price criteria—could reduce risk and support steadier progress.
Other rounds show progress, albeit slowly. A 450 MW project in one prefecture has inched forward, with a vendor selection for turbines in limbo awaiting a formal green light from officials. A separate 684 MW project is edging toward construction, with company executives expressing cautious optimism about reaching commercial operation in the near term.
Government plans set 2040 targets to push offshore wind to tens of gigawatts, up from a fraction of a gigawatt currently online. To reach this, the administration intends to keep a revenue-support framework for future rounds, while placing greater emphasis on timely delivery. Floors on price and qualification standards are expected to be introduced to deter unrealistic bids.
There is also talk of re-tendering the relinquished Round 1 sites, though officials suggest a late-2025 or early-2026 timeframe is more likely, rather than a quick restart. The sites include Noshiro-Mitane-Oga, Yurihonjo and Choshi, with capacities spanning several hundred megawatts each.
At a conference addressing offshore wind, policymakers signaled a commitment to diversifying energy away from fossil fuels. They stressed continuing with the Round 1 re-tender while also participating in the longer-term decarbonisation auctions for the later rounds, aiming to foster domestic supply chains and technology development.
Officials also outlined new efforts to bolster the industrial and technical backbone of Japan’s wind sector, including supply chain strengthening and localization of manufacturing and maintenance capabilities to reduce dependency on imports.
