Abstract
The purpose of this paper is to descrive the process how we planned and preserved the environment of Tokiwa-Dejima water front area in Nagasaki Harbor. According to the remote sensing survey, the green zone in Nagasaki urban area is reducing, especially along the water front. The amount of green area allocated in urban space planning may be limited but connecting this green area with the existing vegetation, the total bio-activity area (“biotope”) will be enlarged. When we design waterfront area, we have to create a wholesame evironment for the bio-activity in beach, tidal and sub marine area. And also we should not use up all the spaces for human beings but we should save the space for bufferings and relieving the human pressure against the bio-activity.