Local SNS supports not only activities of the local society but is expected as a network infrastructure to support activities responding to disasters. This study examined the roles for and the potentiality of the Local SNS, which was specialized for local characteristics, to play at the time of disaster, clarifying the manner of actual use of the Local SNS during the Great East Japan Earthquake through analysis of the log data that were available at the time of the disaster. It was made clear that, during the Great East Japan Earthquake, the Local SNS was effectively functioning as the place for collecting the necessary information for the disaster areas and for support activities.
