The purpose of this study is to clarify the issues of maintaining and preserving and passing on the regional characteristics of the kawara roof landscape in terms of the specifications of the roof materials. For this purpose, the color and shape of the hidari-sangawara and the appearance of the munaishi were investigated in the preservation districts of the historic buildings. As a result of this investigation, the following situations were identified. The use of red kawara is being promoted in the Tsuwano Preservation District of the Historic Buildings, and there is a possibility that the use of black kawara will decrease. In the Akizuki Preservation District of the Historic Buildings, the use of hidari-sangawara has decreased dramatically over the past 30 years. In the Yokaichi-gokoku Preservation District of the Historic Buildings, the percentage of shinogi-sangawara rails is two-thirds higher. In the Kaga-hashitate Preservation District of the Historic Buildings, the use of munaishi is characteristic of traditional buildings only. The color, shape, and munaishi of the kawara roof show regional characteristics, and the selection of materials based on detailed examination of the specifications is important for maintaining, preserving, and passing on the characteristics of the landscape.
