Abstract
This paper aims to analyze housing demands as a major factor of urban sprawl in Urbanization Control Areas (UCAs), where developments and buildings are in principle not permitted in order to restrain disorderly expansion of the urban area. The conclusions are summarized as follows; (1) The housing activities in UCAs are caused by local housing demands in UCAs and extensive housing demands outside UCAs. (2) The local housing demands of farmers and their off-spring continue to generate within UCAs, because they need not move out of urban suburbs to find employment. (3) As their housing activities are permitted due to legal exceptions in the regulation system of UCA, large housing demands consequently promote urban sprawl over a long term. (4) Though the extensive housing demands must be concentrated in Urbanization Promotion Areas, they promote urban sprawl in UCAs. This is due to the detached houses and lots, which are developed in disorder on existing building lots in legal, are supplied for the extensive demands. (5) Therefor it is necessary to reduce disorder housing activities in UCAs, in order to restrain extensive housing demands and, consequently, to control urban sprawl.
