Mitsui consortium proposes turbine changes and construction delay for Niigata offshore wind project
A consortium led by Mitsui and Co is proposing to use smaller turbines and delay construction at its Niigata wind farm. This shift is driven by higher costs.
Insights:
A consortium led by Mitsui & Co Ltd , in partnership with German energy company RWE AG and the Japanese utility Osaka Gas Co Ltd , is considering a significant revision to the technical specifications and timeline for its 684-megawatt offshore wind farm project in JP 
JP. During a consultation meeting held in Niigata on Tuesday, January 20, 2026, the group presented a plan to shift from using 38 larger turbines in the 18-MW class to 46 smaller turbines in the 15-MW class. This proposal also includes delaying the start of offshore construction by one year, moving the expected commencement to April 2028.
JP. During a consultation meeting held in Niigata on Tuesday, January 20, 2026, the group presented a plan to shift from using 38 larger turbines in the 18-MW class to 46 smaller turbines in the 15-MW class. This proposal also includes delaying the start of offshore construction by one year, moving the expected commencement to April 2028.
