抄録
In recent years, low-level housing land developments have been sprawling out of City Planning Areas in Hakodate City. In response to this sprawl, Hakodate City enlarged its City Planning Areas in 1997 and incorporated these enlarged areas into Urbanaization Control Areas. At the same time, the city decided to limit its planning permissions only in certain areas within the Urbanization Control Areas, in order to guide these areas to become improved urbanized areas with a certain quality level. This study clarifies the historical details and problems of housing land developments in these areas.