2020 Volume 45 Issue 2 Pages 117-124
The estimated tsunami flood area along coastal regions was revised following the establishment of the Law on Making Local Areas Resistant to Tsunami based on the lessons learned from the Tohoku earthquake. Regional towns and cities that face the ocean throughout the whole of Japan are now required to conduct urban planning based on tsunami disaster risk, in addition to the previous challenges of population decline and population aging. This paper initially outlines the legal system and example cases of development plans that respond to the new tsunami disaster risk. The paper then formulates a hypothesis that citizens, who select where they live with awareness of the tsunami disaster risk within cities where most of the city center is estimated to be the tsunami flood area, tend to live in locations that are less convenient in terms of transportation than their previous home. An attempt is made to verify this claim. After conducting a survey in Kochi City and analyzing the obtained data, the results were shown to support this hypothesis. The government needs to not only provide risk information but should also develop planned infrastructure for disaster mitigation.