The renewables unit of a major Japanese oil group unveiled plans to build a 1GW offshore wind farm that’s the joint-largest yet announced for the country, and could deploy floating wind technology alongside fixed foundations.

Cosmo Eco Power wants to install as many as 125 turbines in the 8-12 GW capacity range up to a maximum of 1,000MW off Ishikari Bay, Hokkaido, according to an environmental assessment report released by the firm.