Japan Energy Fund has invested in Natel Energy through its Decarbonized Tech Fund managed by Japan Energy Capital.
Natel Energy is a US-based sustainable energy company that offers both a proprietary, fish-safe Restoration Hydro Turbine design and a SaaS solution called HydroForecast.
https://www.japanenergyfund-ventures.com/natel-energy-press-release
The NHA's Powerhouse published an insightful article by VP of Public Affairs Kate Stirr discussing the challenges and solutions to ensuring safe passage for eels through operating hydropower plants.
Abe Schneider and Sterling Watson lay out the argument for FishSafe™ turbines in this paper published in The International Journal of Hydropower & Dams, Issue 5.