Due to the urbanization phenomena we have been facing a new issue to early resolve, that is, a problem on stranded commuters. In this paper, we discuss municipalities' countermeasures for stranded commuters in Nagoya city which is the third largest megacity in Japan. Based on the national census of the population and the person trip survey data, we estimated 665,000 persons as the number of stranded commuters in a weekday. In addition we carried out a questionnaire survey targeted to business companies surrounding Nagoya Station on the cooperating policies for giving relief to stranded commuters. As the result their emergency evacuation resources are not enough by any means, but we are certain of reliability of their cooperation with the municipality measures.