Abstract
This study dealt with an open space planning of Kohoku New Town which aimed at establishing open space system to conserve natural environment. The purpose of this study is to clarify the theoretical advancement process of open space planning and meanings and roles of parks and open space as a means of realization. It was confirmed that the open space planning of Kohoku N. T. was able to be understood as the process to realize structural open space system keeping the balance of a dual-function supported by parks and open spaces; recreational use and conservation of natural environment, and this dual-function system was regarded as a obstacle for building a structural open space system in the following two respects ; lowering of function and limitation of component.
