Abstract

This qualitative case study explores the process and significance of multi-agency collaboration in community-based psychiatric crisis response in rural Japan. Drawing from five semi-structured interviews conducted between 2021 and 2023 with visiting psychiatric nurses and consultation support specialists, the study highlights a critical case involving a man in his 40s living alone under public assistance who experienced a sudden physical and psychiatric crisis. When traditional emergency medical services proved inaccessible due to systemic and institutional limitations, visiting nurses coordinated with care managers, municipal welfare officers, and an emergency relief facility (Facility C) to stabilize the client without hospitalization. Thematic content analysis revealed key mechanisms underpinning the success of the intervention: flexible role adaptation among providers, proactive engagement by care managers to reduce help-seeking avoidance, and the strategic use of social welfare infrastructure for non-medical stabilization. These findings underscore the urgent need to strengthen outreach-based mental health services in Japan and to institutionalize models of collaborative, community-based crisis care—particularly in rural areas where medical infrastructure is limited. This case contributes to the growing body of international evidence supporting integrated, rights-based approaches to mental health crisis intervention.