抄録
To examine how to promote the evacuation of inhabitants, we investigated the evacuation of inhabitants in 5 major disasters in 2009-2010 using disaster reports provided by the Ministry of Land, Infrastructure, Transport and Tourism. We collected the information on evacuation, including the area, designation of the sediment-related disaster (special) warning area, time of issue of evacuation call, type of evacuation call (“evacuation order” or “evacuation instruction”), the total target households and inhabitants, and the total actual evacuees. The results suggested that the evacuation ratio (i. e., the ratio of the total actual evacuees to the total target inhabitants) in the individual areas decreases with increasing target households (especially > 50), that the type of evacuation call and the time of issue do not affect the evacuation ratio, and that designation of the sediment-related disaster (special) warning area can improve the evacuation ratio when the target households are ≤ 50. Hence the high evacuation ratio can be expected when (1) the sedimentrelated disaster (special) warning area is designated or (2) the evacuation call is issued for each “Chiban” or “Koaza” (small administrative block in Japan generally containing households ≤ 50).
