Regarding tsunami disasters, the literature [7] describes an inundation height greater than 2 m as generating
building outflow and human suffering.
Securing evacuation facilities is important in areas with a minimum
inundation height of 2 m as a short-term countermeasure; this countermeasure is also critical in the case of flooding.
From a long-term perspective, the promotion of emigration toward areas with low risk, such as areas with higher
ground levels, is important. In areas with a maximum inundation height of 2 m and areas with a significant trend of
depopulation and aging, the promotion of emigration is important. In areas without a significant trend, the regulation