Coastal fishery becomes difficult, in proportion to human habitation concentrating in the coastal areas. Like running out of petroleum, someday land water resources will decrease in inverse proportion to population density. Looking at the situation from a broader viewpoint, the general idea of "satoyama" and "satoumi" is the same. It is indispensable to keep good water resources for the well-being of the ecosphere including human beings, and a point of view like that is necessary in dealing with fishing from now on.