Abstract
Both of river and seacoast zones have to be administrated as public domain; however, they are developed through different historical paths because of their different natural and social features. Comparative analysis of river and seacoast administration history led the following conclusions: (1) the key factor for better coastal management is to base relations between seacoast and two different stresses, one from the land side such as land ownership and land use and the other from the sea side such as physical change in coast and use of coastal area; and (2) coastal administration policy should shift to environmental management from public domain management.