Social isolation of the elderly has become an urgent problem to be addressed. However, it is a complicated matter as it is concerned with the various issues that require social support. First, this report shows how previous studies categorize the characteristics of the isolation of the elderly and their solitary death. Second, it refers to several policy documents related to social isolation. Third, it makes clear the possibilities and limitations of community-based activities with regional survey data of Suita city, Osaka. The investigation revealed the following facts: social isolation is...