Abstract
In Japan, whose population has increased rapidly in recent about 100 years, but will decrease in future, it is demanded to aim at sustainable development in accord with nature restoring the water and material circulation, eco-system and landscape once lost in the basin/watershed scale. This study shows the necessity of regeneration scenario for the basin/watershed arranging the way to recognize them. It also analyses the progress/practical cases and plans in Japan and abroad based on their form/scale and purpose, and shows the model of the scenario for the urban/watershed regeneration in accord with nature taking those conditions into consideration.
