UPDATER began supplying a portion of output from Cosmo Eco Power’s 6.6MW Ishikari Bay New Port Wind Power Plant in Otaru City, Hokkaido, to the department store operator Marui on April 1, 2025, the power retailer announced on July 7, 2025.
According to the statement, supply will be matched with consumption at the Shinjuku Marui Main Building in the Tokyo TSO area on an hourly basis, in line with RE100 standards. Further details of the project-specific supply contract, including the supply volume and agreement duration, were not disclosed.
The power plant, consisting of two 3.3MW Vestas turbines, was commissioned in February 2018. Until the launch of the scheme with Marui, it operated under a feed-in-tariff (FIT) contract secured in FY2015, when 20kW and larger onshore wind projects were offered 22 yen per kWh for 20 years.
On the day the Marui deal came into effect, Cosmo Eco Power converted the asset to the feed-in-premium (FIP) scheme, which allows asset owners to sell output directly into the wholesale market or via bilateral agreements. The original contract’s FIT price was maintained as the new contract’s FIP strike price used to calculate market-linked premiums. Its October 2037 expiration date remains unchanged.
Marui Group previously disclosed PPAs for solar power plants owned by JA Mitsui Energy Solutions and Tokyo Century-JPN ENERGY Integrated System joint venture ADD Energy No. 1. The deal with Cosmo Eco Power is its first known agreement for output of a wind power plant.
Ishikari Bay New Port is the latest of a string of Cosmo Eco Power onshore wind projects, including the 48MW Chuuki Wind Farm in Wakayama Prefecture and the 1.2MW Goto Hassakubana Wind Power Plant in Nagasaki Prefecture, to be converted from FIT to FIP for use in PPAs.
