Chemical properties of tsunami-inundated soil and tsunami deposits were investigated using the samples obtained in Tohoku after the 2011 Tohoku-oki tsunami. The relative composition of water-soluble ions in the inundated samples obtained from Tohoku was similar to that of seawater and no significant difference was found between the tsunami deposits and the tsunami-inundated soils. Some soil samples show that the water-soluble ions in the surface may have been removed by rainfall, indicating that the layers of the tsunami-inundated soil and tsunami deposits could not be correspond to the layers containing rich chemicals.
