The inscriptions on 10 stone monuments related to flood or debris flow disasters in Hiroshima Prefecture, southwest Japan, were described. In total, there are 50 monuments in Hiroshima Prefecture based on our previous data and these additional data. Two turning points in the 1880s and 1950s were recognized based on the characteristics of the monuments in terms of their inscription contents, volume of contents, ratio of height and length of the monuments, and use of written language. Few monuments were built before the 1880s and their contents were less informative. Monuments erected from the 1880s to the 1950s were taller; their contents were characterized as detailed information relating to damage or restoration and were inscribed using kanbun, Chinese characters only, or kanji characters with katakana. The inscriptions on some monuments expressed residents’ appreciation for solatium from the Emperor or honored a person who contributed to the restoration after disaster. Fewer monuments built after the 1950s acknowledged disaster damage or restoration, and their contents were less informative, but more monuments were memorialized victims with a short message. The characters inscribed on these monuments were kanji with hiragana. Wider monuments were observed after the 1970s.