Recently, environmental problems have been discussed as global theme. One of them, rebirth of SATOYAMA has been experimented in many regions to create idealistic relation between forest and sea in Japan. By the way, author has researched the SATOYAMA of the deciduous trees of Izu Peninsula and many problems are recognized in its results. In this report, relation between a situation of planting deciduous trees and the environment of the region has been described especially.
