This study is aimed at implementing the PDCA cycle (process improvement technique consisting of 4 steps:Plan,Do,Check, and Act) which has two main components, medical, long term care, and welfare care fieldsites and the university. We have planned to cooperate with the medical, long term care, welfare fieldsites by examining together the Tsukuba-city medical welfare case examination meetings, and providing feedback to Tsukuba City by analyzing their needs survey. We performed a scientific study using several types of data analysis, including big data from national long-term care benefit expenditures data and from the Comprehensive Survey of Living Conditions. We examined the regional comprehensive care promotion policy , including these findings, to clarify how to advance the cooperation between medical and long-term care, what kind of support require the persons in need of care, children with disabilities and the use situation of nursing care insurance services.