We examine contents of the inscriptions on all of the stone monuments related to flood or debris flow disasters in Hiroshima Prefecture, southwest Japan. Because it is difficult for people today to understand the meaning of the inscriptions, which were written in classical Chinese, we translate those in modern Japanese. At least 38 monuments were erected in Hiroshima Prefecture during the 106 years between 1909 and 2015. The contents of inscriptions from before World War II and during the war include plentiful information related to the process of erecting the monument, and details on disaster damage and restoration work. The contents inscribed on the monuments built after the war have mainly eulogized disaster victims or memorialized restoration work, and include only brief information on disaster damage. These monuments have the potential to inform local people about the situation and areas affected by past disasters. This research contributes to education for disaster prevention by increasing awareness of past disasters.