The sand beach suitable for loggerhead sea turtles to lay eggs has various functions including disaster prevention, habitat for organisms and as fishing grounds. However. shore development and coastal development is affected by prefectural and city boundaries that cross the sand beach and therefore affect the ecosystems of sea turtles and other organisms. The activities of this project include conducting further investigation to add to the existing survey results in order to create and communicate a model case for harmonizing "protection, use and environment" that is established by Coastal Law. Fundamentally this project includes:(1) the pursuit of a sand beach environment suitable for loggerhead sea turtles to laying egg by comparing the breeding situation. (2) Comparison of domestic beach and sea turtle breeding grounds and a compilation of the assessment (3) Regeneration of the sand beach divided by breakwater to a naturally rich sand beach using pre-existing beach plants and sand fencing (4) Proposal and communications from the COP Convention on Biological Diversity. By announcing these results, we hope to create and spread a coastal conservation model that is considerate of the environment.