[P1-13] the Transition of Land Use of Koba-saku in Tsushima Island, Nagasaki Prefecture Based on Geographic Information System
キーワード：Koba-saku, Tsushima, Transition of Land Use , Cultural Landscape
Koba-saku is a farming method unique to Tsushima Island, Nagasaki Prefecture, in which charcoal is burned on the slopes of mountains. There plants are burned, fertilizer is made, and agricultural products such as sweet potatoes and buckwheat are cultivated. Since 90% of the island is covered with mountains, there is little arable land, and koba-saku is an excellent farming method that not only saved Tsushima from famine, but also supported the sato-yama environment. However, as the post-war food shortage was resolved, koba-saku naturally disappeared. Many of the places where koba-saku were once practiced have now been replaced by cedar and cypress plantations. Koba-saku not only supplies food, but also contributes to the natural environment and biodiversity. In this study, using aerial photographs and topographical maps based on Geographic Information System, the purpose is to clarify the transition of land use from the past to the present of koba-saku in Tsushima Island, Nagasaki Prefecture. Based on the results, it will be used as basic information for cultural landscapes related to food.