Japan Offshore Wind Auction Outside the Sea Area Act: A Secret Ceiling After Three Rounds With No Winner
Japan opens its fourth FIT/FIP auction for fixed-bottom offshore wind outside the Renewabl…
Understand what offshore wind costs in Japan, how economics vary by site, and which revenue and financing terms make a project viable.
Start with the guide
Offshore Wind Cost Structure and Economics
Connect CAPEX, OPEX, LCOE and revenue schemes before examining individual projects.
Explore by question
What makes up the cost?
Understand construction costs, operating costs and LCOE.
How do sites compare?
Compare LCOE and returns across Japan’s offshore wind zones.
Can a project secure financing?
Examine revenue conditions and project-specific cost assumptions.
Does the auction price cover costs?
Examine the gap between bidding terms and project economics.
Test your assumptions
Explore how cost, WACC and revenue assumptions affect the results.
Explore the Viability Simulator →Latest cost and viability analysis
BP’s Reported Exit from 450 MW Yuza: Why Winning Japan’s Offshore Wind Auction Isn’t the Same as Financing It
BP is reportedly exiting Japan’s 450 MW Yuza offshore wind project. The deeper issue is structural: why a zero-premium Round 3 award is hard to finance — and how the LTDA could change it.
Cost Realities of Japan’s Offshore Wind: LCOE and IRR Across 12 Promotion Zones (2026 Update)
Japan’s 12 offshore wind promotion zones compared on LCOE and IRR using DeepWind’s cost model. Akita and Yamagata lead; Hokkaido faces structural constraints driven by wind, water depth, and grid distance. All zones on common assumptions.
Offshore Wind Cost Breakdown in Japan: Where ¥908,000/kW Goes
Japan’s fixed-bottom offshore wind costs about ¥908,000/kW in a developer survey, with installation near a third. How to read CAPEX, OPEX and LCOE.
Japan Offshore Wind Cost Structure and Economics: Four Numbers That Decide Viability
At ¥908,000/kW, Japan’s fixed-bottom offshore wind costs about ¥20 to ¥41/kWh depending on assumptions. How CAPEX, yield, capital and price interact.
Goto Floating Offshore Wind Cost: What JPY 36/kWh Can Pay Back
Goto’s construction cost is undisclosed. Working back from its JPY 36/kWh tariff, 20 years of revenue can repay about JPY 530,000 to 1.18 million per kW.
Promising Offshore Wind Zones in Japan: Round 4 Investment Outlook
Japan’s nine offshore wind promising zones compared on LCOE and IRR under the same assumptions as the promotion zones. Sakata undercuts every promotion zone; Gan-wu-Minami-goshi fails despite the shortest grid run.