Ecotype water turbines can be utilized small and distributed water resources with little civil engineering works and without environmental burdens. In Japan, network of agricultural waterway extends 400 thousands kilometers, this abundance of waterpower has a high expectations for electric power generation. The turbines will promote local production for local consumption of electricity. Waterfall type turbine and undershot turbine are investigated and demonstrated in some field tests. These are opened type which has no casing and any water pipes. We summarize our results of the investigation of eco-friendly water turbines.