This study investigates the formation process, operational characteristics, and practical functions of a privately initiated network of housing support organizations (the Network Council) in Area B of Prefecture A. Focusing on a network established by certified housing support organizations, it analyzes how inter-organizational collaboration has developed in response to the limitations of single organization housing support. Employing a qualitative research design, semi-structured interviews were conducted with two key informants, the chairperson and the secretary-general, who played central roles in the establishment and management of the network. The findings demonstrate that contemporary housing support increasingly involves complex and interrelated needs that exceed the capacity of individual organizations. In this context, the Network Council functions as a practical mechanism for information sharing, collective decision-making, and coordination with external agencies. Furthermore, the network reframes housing support as a continuous process encompassing post-move-in support and the maintenance of everyday life. At the same time, challenges related to operational burden, role visibility, and long-term sustainability were identified.