As a problem how to preserve a historic urban district along with the dwellers livings, the author discusses the availabilities and problems in the system for Important Preservation District for Groups of Historic Buildings (IPDGHB) in Japan, which was established by amendment of the Law for the Protection of the Cultural Properties in 1975. Using a control experimental approach in field survey, three districts (Kita, Minamai, Shimohiraya) in Miyama-cho, Kyoto were investigated. Kita-district was selected as IPDGHB in 1993, however, the other two districts had once become the candidates for IPDGHB, and finally were not designated on each dweller's own decision. In three districts, landscape transformations after the selection were examined with some aspects of building existence, building roof materials, building usages, exterior of buildings, road and land uses. As a result, some differences of way of changing were observed among the three districts. It can be said that in spite of the original aim of the IPDGHB for preserving traditional environment, landscape as total space structure have changed by not only tourism development but also the preserving activities itself.