The Zenikame-Menagawa tephra (Z-M) has been reported from distal terrestrial settings in the southern Hokkaido, with those erupted from Zenikame volcano, and provides an important stratigraphic marker for paleoenvironmental reconstructions of marine isotope stage 3 (MIS 3). We use both major element (EPMA) and trace element (LA-ICP-MS) analyses on proximal and distal Z-M shards to make the correlations to explosive eruptive events. Proximal stratigraphic succession is divided into deposits of two main eruptive phases with pyroclastic fall (Z-Mpfa) followed by pyroclastic flow (Z-Mpfl). The Z-Mpfl and Z-Mpfl deposits are geochemically distinct and thus their origins can be different. Considering geochemical characteristics of glass shards, the distal Z-M in the Tokachi district, located about 200 km west of the source volcano, can be identified as ash fall deposits associated with the Z-Mpfl eruption.
