“…Shallow landslides appear frequently on the Aso volcanic mountains. The same sediment disasters have repeatedly occurred in June 1953, July 1990, with the last one occurring at July 12, 2012 (Goto and Kimura., 2019;Higaki et al, 2019;Kimura et al, 2019; when a cumulative rainfall of 508 mm triggered numerous landslides and severe sediment disasters throughout the month. The soil materials in the shallow landslides on the Aso volcanic mountains consist of tephra layers from volcanic activities.…”