Study on the Setting Standard of a Preservation Area Based on the Reexamination Investigation in Preservation Districts for Group of Historic Buildings : A Case of Yokaichi-Gokoku，Uchiko-town, Ehime-Prefecture

Recently, the area of preservation district for groups of historic buildings is decided ground on the historic area, landscape, and unity of local community. However, they were narrowed because of various reasons at early stage of the institution. So it is necessary to consider its appropriate area. However, expansion of an area which is not based on a historical basis has a risk of making value lose. Therefore, expansion of an area requires detailed research. The purpose of the research is to put the reexamination of preservation district in apple-pie order and to show the items of the established criteria in Yokaichi-Gokoku. There are five items and show them in the following. It is not divided by the boundary line of a preservation area in consideration of the one nature of a site. It is the historical city area range of YokaichiGokoku. They are temples and shrines which should be saved as the element of history and the landscape composition. The elements such as historic building, stone fence, well, and tree peculiar to an area remains. Scene control for land use, such as farmland, not to develop into home lots is indispensable. These items are effective in order to conserve and succeed the characteristic property of Yokaichi-gokoku supported by the history and culture of the area