해변가에 많은 담수가 용출하고 있으며, 토질은 사토·사질토·점질토 등으로 형성되어 비옥하여 농경에 매우 적합하다.
A lot of fresh water is flowing out on the beach, and the fertile soil composed of sand soil, sandy soil, clay soil, etc. is very suitable for farming.