Abstract
A typical landscape in each village in Okinawa is a house with red roof tiles, stone walls and G. subelliptica for prefeeting wind. G. subelliptica has been used not only for wind protect trees but as dyes and building materials since the 18 century. Since then, the government of the Ryukyu, the old name of Okinawa, encouraged the people to plant G. subelliptica in the villages. When a village was newly formed, G. subelliptica was extensively planted. Thus, it has been found that the relationship among six villages was clarified by studying the planting and spread of G. subelliptica. In this study, we verified whether a diameter of G. subelliptica had a close relation with the village formation. As a result, it was revealed that the investigation on G. subelliptica was effective in terms of the village formation, where the traditional landscape left in the old village.
