One of the key lessons from the Great East Japan Earthquake is the importance of strengthening the disaster response capacity by activating a mutual-aid attitude among various actors, including residents, communities, and businesses. Given the limitations of public-aid that can be provided by the governments, residents and communities need to be prepared for the next big disaster by enhancing cooperation among them in their daily lives. This study aims to empirically analyze whether social capital before the disaster, as measured by the participation level in community activities, can promote the mutual-aid attitude (giving aid and receiving aid) after the disaster. Using a micro dataset from the local residents’ survey in the disaster affected area, a model for analysis—wherein the correlations of the giving aid function and the receiving aid function were taken into consideration—was developed. The result of the analysis indicates that mutual-aid attitude becomes significantly higher when participation in community activities in daily lives is more active, implying that social capital facilitates cooperation among residents and communities, and promotes recovery.
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