Abstract
Although decades have passed after first warning of epicentral earthquake under Tokyo metropolitan area, specific measures to the disaster are still to be carried out. Since the Great East Japan Earthquake, preliminary discussion of making a backup system in Kansai area for the capital function began, while full-scale debate has not been started. In this feasibility study, several areas, including the old relocation candidate sites, recent sub-capital concepts and others, were investigated as capital function backup location. The followings were explained as primary concepts: First, in the case of complete relocation, it is important to select an alternate site with lower probability of malfunction. Second, in the case of backup, it is more important not to suffer from earthquake in short period. This study contains research of earthquake disaster risk degree, probability study of simultaneous malfunction with Tokyo metropolitan area, consideration to utilization of the existing urban function, and examination of accessibility to nationwide. As a result, it was found that Gifu-Aichi area, that is one of the old candidate sites, and the mid-west part of Kansai Science City are suitable for complete relocation．And it was found that they are also suitable for partial relocation of the capital functions without mutual relationship. In addition, it was found that the mid-west part of Kansai Science City is appropriate for the backup destination. Furthermore, if relaxing some of the conditions, Osaka International Airport, Expo Memorial Park, Tochigi-Fukushima area, and the west part of Mie-Kio area are also found to be a backup location.
