The purpose of this paper is to analyze the impact of improving urban infrastructure and the park policies on the green open spaces in Tokyo Metropolitan suburban area after the establishment of the new city planning law in 1968. The research areas were designated as the Land Readjustment Assumed District in 1965-1969. The following 3 points were clarified. 1) The policy of infrastructure improvement has been changing in different way from wards depends on the old infrastructure and the green open spaces. 2) After 1960s many small-sized parks were built by land readjustment projects. But mo...