link: https://finance.yahoo.com/news/giant-deep-ocean-turbine-trial-010744355.html [yahoo.com]
link: https://tethys.pnnl.gov/publications/power-generation-using-kuroshio-current [pnnl.gov]
"Ocean currents, such as the Kuroshio Current, are expected to be effectively used as marine renewable energy in order to supply sustainable energy and reduce greenhouse gas emissions. IHI is aiming to realize power generation using an ocean current and is working toward development of a floating type ocean current turbine system."
If it's endless and free, it has no value? /s