Abstract
This paper aims to investigate revisions of district plans in the detached housing areas where physical and social environment have been changing since the introductions of the district plans. The paper conducts inquiry survey to 718 municipals. The result shows that revisions are made in half of the district plans, but only few revisions are made according to the need of meeting environmental changes. The case study shows that there are three types of revisions. The first one is to ease regulations for whole area to meet new demands for facilities for residents. The second is to ease regulations for individual buildings. The last is to restrictions to stop undesirable development. The study also shows that careful revisions are required as they may cause deteriorations in environments. The discussions on revisions may promote citizen initiatives in planning and maintenance of environment.
