In South Korea, the maintenance and utilization of street spaces have been around administrative purposes, whichhas raised a couple of issues including difficulties with arranging street spaces in ways that local residents want and noreflection of local diversity. From this perspective, this study focused on cases in Japan, in which various private subjects in thecommunity have long participated in the utilization and maintenance of street spaces including their arrangement for thevitalization of street spaces, and analyzed eight factors in those cases in three aspects including organizational composition, system utilization, and activity and space utilization. Based on these factors, the study offers the following implications for SouthKorea: first, legal systems should allow local private sector organizations to make a profit from the utilization of street spacesand enable the continuous utilization of private owned public spaces around streets based on the premise of reinforcing thenature of local private sector organizations as the organizations to manage the entire street spaces and returning them tomaintenance in the enactment and revision of legal systems for the utilization and maintenance of street spaces; secondly, organizations should be formed to reach consensus among various local communities and support them by makingimprovement and utilization plans for street spaces along with organizations devoted heavily to the utilization and maintenanceof streets; and finally, the smooth utilization of street spaces by local private sector organizations should be accompanied bystreet improvement such as the expansion of sidewalk width. In such cases, social experiments should be done concurrentlyunder the leadership of local private sector organizations to take into account utilization after improvement.