2018 Volume 16 Issue 2 Pages 163-178
When a downpour with a scale seen only once every few years has been observed or analyzed in the last hour, the Japan Meteorological Agency announces Bulletins on exceptionally heavy downpours, has begun from 1983. But there is nothing investigated the history of Bulletins on exceptionally heavy downpours, and a rate of occurrence of the disaster.
We researched the history of Bulletins on exceptionally heavy downpours, and a rate of occurrence of a disaster every municipalities. As a result, flood disaster or sediment disaster occurred by 61.6% in the municipalities where Bulletin on exceptionally heavy downpours was announced. This is the high accident occurrence rate. We consider the Bulletins on exceptionally heavy downpours plays the fixed role as disaster information.
