Cosmo Eco Power completed the environmental impact assessment for the 15MW Hazaki Wind Farm repowering project in Kamisu City, Ibaraki Prefecture. It submitted the final assessment on September 1 and received METI approval on September 26, 2025.
According to the document released for public viewing on October 7, 2025, Cosmo Eco Power plans to build four 4.2MW turbines across a 32ha site, with their combined output capped at 15MW due to grid connection limitations. The project will replace the 12 1.25MW turbines that were part of the original power plant, which operated between March 2004 and March 2024.
Removal of the decommissioned turbines is expected to be completed by the end of 2025. Cosmo Eco Power plans to begin construction of the new power plant in April 2026 and start commercial operations in February 2028 following a brief trial operations period.
The repowering project was feed-in-tariff (FIT) certified in FY2021, when replacement onshore wind power plants were offered 15 yen per kWh for 20 years. It is unclear whether Cosmo Eco Power plans to operate the asset under FIT or convert it to the feed-in-premium (FIP) scheme at commissioning to sell its output through a PPA.
The company launched the environmental impact assessment process in August 2021. It advanced the project to the methodology stage in January 2022 and to the draft report stage in June 2024.
Cosmo Eco Power holds stakes in 20 onshore wind projects in Japan totaling 349.3MW and in two offshore wind projects totaling 138.6MW. Most recently, it commissioned the 33MW New Mutsu-Ogawara Wind Farm in Rokkasho Village, Aomori Prefecture.
