Recently, crime in residential areas has increased rapidly in Japan. Still more various measures have been taken against crime for apartment houses, detached houses, and residential areas through the original surveys in this country and CPTED theory in Western countries. Furthermore, I think that there are three future problems for security of towns:(1) still more the spread of crime prevention method through environmental design, (2) residents participation in citizen-based town planning against crime, (3) training specialists having good knowledge on CPTED and resident's role: leader of residents, city planners, architects, administrative officials, and police men.