General – Floating Wind
The Tokyo Metropolitan Government has unveiled plans for a 1-gigawatt floating offshore wind farm (FOWF) off the Izu island chain, positioning the capital at the forefront of next-generation renewable energy.
The ambitious initiative is slated for completion by 2035 and aims to deliver electricity to five island communities as well as mainland Tokyo via high-voltage subsea cables.
The proposed wind farm will span waters surrounding the islands of Oshima, Niijima, Kozushima, Miyake, and Hachijo. With a nameplate capacity comparable to a single nuclear reactor, the facility is expected to operate at an estimated 40% capacity factor, reflecting typical offshore wind performance.
At the heart of the project is floating turbine technology, in which wind turbines are mounted on buoyant platforms anchored to the seabed. This approach allows deployment in deeper waters, a key advantage for Japan’s steep coastal geography. Power generated offshore will be transmitted to shore through a network of subsea cables.
To accelerate early-stage development, Tokyo has tripled its fiscal 2026 budget allocation for wind-related studies to 2.7 billion yen (approximately $17 million). Current efforts are focused on seabed soil analysis, topographical mapping, and weather pattern assessments. The site is presently designated as a ‘preparation zone’, the earliest phase in Japan’s offshore wind planning framework.
Despite strong government backing, the project faces notable hurdles. Industry observers point to private sector concerns over long-term profitability, high upfront investment risks, and uncertainty surrounding the 2035 completion target. Analysts caution that timelines may slip given the project’s preliminary status.
The initiative forms part of Japan’s broader strategy to reach 45 gigawatts of offshore wind capacity by 2040. While floating wind remains a relatively small segment of the global market, Tokyo’s proposal signals a significant push to scale the technology and reduce reliance on fossil fuels.
