The present study detected pumice grains of Kawagodaira Pumice, which was erupted at 3160‒3137 cal BP, from the >0.063 mm size fraction of cored deposits of the Upper Holocene at site 3 of Nakazato, Yaizu City. We inferred the initial stratigraphic position of the pumice at a core depth of 6.51 m (elevation −3.70 m).