We investigated the Middle to Late Pleistocene maker tephra layers in the western footslopes of Mt. Iizunayama based on lithographic features and major element composition of glass shard and some specific kinds of rock forming minerals, namely, hornblende and orthopyroxene, by an electron microprobe analyzer. Nine maker tephras were identified, including widespread tephras of the Aira-Tanzawa Tephra （AT）, Daisen-Kurayoshi Pumice （DKP） and Aso-4. We also recognized that one tephra layer had lithographic features and stratigraphic position which were not fully described in previous studies. This tephra layer, named in this research as ‘Chusha Scoria （CS）’, was sourced from the Iizunayama volcano, stratigraphically occurs between AT and DKP and was dated between 45 and 51 ka in consideration of brown loam （tephric fine-grained soil） accumulation rate.