摘要：Facing challenges of population decline and fiscal austerity,Japan has implemented a series of initiatives to promote public-private partnerships(PPP)to ensure the sustainability of urban parks and revitalize urban *** initiatives,while alleviating the government’s financial burdens on parks,have also raised concerns about the potential erosion of publicness and public interests resulted from the commercialization of public *** paper reviews the evolution of Japan’s urban park management system after World War II—including three phases of being purely public goods,initiating marketization,and diversifying management *** functions of parks have continuously enriched,and the construction,management,and operational modes have shifted from government-led towards multi-stakeholder participation,along with expanded funding *** examining the PPP types,driving forces,implementation mechanisms and challenges in urban park management,this paper points out that,in different eras and social contexts,the Japanese government has kept adjusting its role to maximize public *** has proactively updated the implications of publicness in infrastructure like urban parks,from a post-war opposite of publicness versus privateness on ownership,to the participation of private capital for a higher efficiency,and finally to a community for a stronger regional *** reforms of urban park management system in Japan offer significant lessons and insights for urban infrastructure management in other countries and regions.