In Japan, it has also become important to guide for the inner-city rebuilding as for the outer-city new development. But the planning system, as district-planning introduced in 1980, can not deal with the random and various change at built-up area. In this condition, this study evaluate some non-statutory district planning systems, and propose the orientation for synthesizing statutory but hard system and non-statutory but flexible system in order to improve residential environment at built-up area.
