This study demonstrates the management system through analyzing the utilization cases of vacant houses of local cities in Japan. The purpose of this study is to clarify ”Enforcement organization and System” and ”Cooperation and Contents”. Firstly, we analyzed the contents of the laws for promotion of local cities. It could be clarified that the main purposes of the laws tend to be changed from hard projects to soft projects. In addition, the interview and questionnaire survey were performed for 10 prefecture administrative offices which were extracted as examples tend to decline in population and high vacant houses ratio. We clarified the relation models between Enforcement organization and related groups. As a result, it was clarified that the countermeasure for the vacant houses can be achieved even without the subsidy from the Public administration. And there were cases that private sectors realized the utilization of vacant houses by collaboration with other groups in local cities.