Abstract
The modernization process of urban space had begun through importance and acceptance of western knowledge and technique. However, historical studies on this process by landscape architecture, city planning and architecture have depended on methodologies from evolutionism, as a result most of them have failed to reveal social power structure relationships functioning over the modernization process. The purpose of this study is to examine how the relationships between modern knowledge and this power structure had developed, by survey on the modernization of ‘slum’, high dense residential area, in Tokyo during late Meiji era. It could conclude that police power with coerciveness and discourses on sanitary with rationality coexisted without any contradiction.