The project was originally developed by Green Power Investment Corporation (GPI), the Japanese affiliate of Pattern Energy.[4] The project ownership changed upon the sale in May 2023 of GPIto JERA - the joint venture of TEPCO Fuel & Power and Chubu Electric Power - and NTT Anode Energy.[5] The duo reportedly paid more than $US 2bn for GPI.[6]
The project uses the typhoon and seismic certified SG 8.0-167 DD offshore wind turbine from Siemens Gamesa[7] (where DD denotes its gearbox-less direct drive generator). It is the first project in Japan to use 8MW turbines.[3] Due to limited electrical transmission capacity to Honshu, and Hokkaido's relatively small, mainly rural, population, the local Transmission System Operator requires that all major renewable generator directly connect projects to a Battery Energy Storage System (BESS), and so the Ishikari Bay project is paired to a 100MW/180MWh BESS.[2]