Abstract
The beach is an indispensable component of the Water Front in the port. Tokyo Port is in the innermost environs of Tokyo Bay which is an enclosed area. Odaiba Seaside Park is in a central location of Tokyo Port. This park which consists mainly of the water is enclosed with Daiba, its breakwater and reclamation land. In this area, the artificial beach and its sea life are innabitants at present. This paper aims to investigate the relativity of the change of sea bottom and its organisms. We will compare the recreation area with the conserv ation area in this park, and will find out tae merit of the artificial beach on the enclosed water.
