Masami Inomata of Hiroshima University explaining at the collapse site of Kagamiyama Castle Ruins in Higashi-Hiroshima City, Hiroshima Prefecture = 7th

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Masami Inomata of Hiroshima University explaining at the collapse site of Kagamiyama Castle Ruins in Higashi-Hiroshima City, Hiroshima Prefecture = 7th

Masami Inomata of Hiroshima University

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Masami Inomata of Hiroshima University

In Higashi-Hiroshima City, Hiroshima Prefecture, which was hit by a serious landslide caused by the heavy rains in western Japan in 2018, many landslides were seen on the slopes around Kamakura-Yamashiro during the Warring States period, which was built on easily weathered flower rocks. , It was found in a survey by Masami Inomata of the Hiroshima University doctoral course until the 22nd. It was an “invisible disaster” that was not noticed because no people lived there, but if the residential land development reaches the foot of the mountain, it could become a new risk for disaster prevention. Yamashiro, which has been abandoned for hundreds of years, is expected to be scattered all over the place.

Since the ridges and mountain peaks were carved to create a flat surface and an empty moat was set up on the slope, the water that had fallen on the mountain accumulated and it became easier to flow rapidly along the moat. ..