抄録
The coastal lowland areas of Minami-Izu and Shimoda, Shizuoka Prefecture, Japan, have been inundated by at least two tsunamis with wave heights of 5–6m during the past 400 years. Previous studies have analyzed the stratigraphy and paleoenviromental setting of Holocene terrestrial deposits in these areas based on one outcrop and sediment cores (8–11 m long) from 13 sites, searching for evidence of tsunami deposits. These analyses yielded no evidence for pre-historical tsunami deposits. In the present study, we examined sediment cores from new three sites in the coastal lowland areas of Minami-Izu and southwest Shimoda. As with the previous studies, we found no evidence for pre-historical tsunami deposits in the terrestrial deposits.