Abstract
In the Great East Japan Earthquake that occurred on March 11th, 2011, social media were utilized in various scenes and social media played the important role. On the other hand, many problems are pointed out to practical use of the social media at the time of disaster. This paper examines the possibility of practical use of the social media at the time of disaster by arranging the advantage and problem based on the situation of the social media use especially in the Great East Japan Earthquake.
