Abstract
This paper analyzes the commuters' behavior under the 2011 off the Pacific Coast of Tohoku Earthquake. Authors conducted web based questionnaire survey to collect the data. Respondents of the survey were limited to the people who had difficulty in going home on that day. And authors conducted interview survey for university and hospital staffs. As a result of this analysis, many commuters go to home through the dangerous zone which are fire zone and building damage zone.