flooded areas. The study area encompassed Natori city, which
is one of the most devastated regions in Miyagi prefecture
(Fig. 2). The developed model was validated at Higashimatsushima
city, Sendai city, Iwanuma city and Watari city in
Miyagi prefecture. The building damage for ground truth was
referred from “Building damage map”, which is a building
footprint data including two damage classes,“Undestroyed”
or“ Washed away ”