16:30 〜 16:45 [MIS17-10] Distribution and Isotope geochemistry of living benthic foraminifera from cold seep environments of Hidaka Trough *Mahsa Saeidi Ortakand1、Tsuyoshi Mamada2、Ryo Matsumoto1 (1.Meiji Univ.、2.Chiba Univ.)