Abstract
We review the current status and problems of the large-scale complex disaster in megacity, which are caused by earthquakes and floods. First, we review the recent evaluation on the occurrence probability of M7 earthquakes under the Tokyo metropolitan area, and compare the historical damage with the damage estimated by the national and local governments. Consequently, we conclude that the possibility of large-scale disaster due to the next M7 earthquake would be very low. On the other hand, we have to prepare for an unprecedented large-scale complex disaster, because of the coincidental multiple events by earthquake and flood. As examples, we investigate possible complex disasters in the areas around the Shinjuku and Kita-Senju stations, and propose various methods realization of resilient buildings and areas in megacity.
