The torrential rain that occurred in July 2nd year of Reiwa caused enormous damage mainly in Kumamoto prefecture. Many river floods occurred in the Kuma River. We conducted a field survey after this disaster. We confirmed overflow 5 places in Hitoyoshi City. Two of these were dike break. And, we confirmed water leakage 1 place in Yatsushiro City. The two parts of overflow have similar characteristics. The damaged parts are all discontinuous in embankment longitudinal direction.