Life Science / Ecology and environment

Natural Science / Biogeosciences

Kobe University, Graduate School of Human Development and Environment, Division of Human Environmental Science

Doctor's Course, 2024.03, Completed

Kobe University, Graduate School of Human Development and Environment, Division of Human Environmental Science

Master's Course, 2021.03, Completed

Kobe University Doctoral Student Fellowship, 2021.04 - 2022.03

JSPS Research Fellowship for Young Scientists, 2022.04 - 2024.03

Waseda University Academic Coach, 2022.04 - 2024.03

Yamagata University, Lecturer, 2024.04 -

Japan Geoscience Union

Japan Association for Quaternary Research

Palaeontological Society of Japan

Japanese Association for Estuarine Science

Paleoenvironmental reconstruction off the Shimokita Peninsula during the past 9,600 years based on planktonic foraminiferal δ¹⁸O, The Quaternary Research (Daiyonki-Kenkyu), advpub(0) , 2025

Sakai Keisuke, Ohkushi Ken'ichi, Ikehara Minoru, Kimoto Katsunori, Uchida Masao

Multiple Authorship (Only Japanese)

Paleovegetation changes from 9,500 to 3,200 years ago based on pollen analysis in Lake Harutori, eastern Hokkaido, Japan, Laguna, 31 1-13, 2024.03

Multiple Authorship (Only Japanese)

Radiocarbon ages and tsunami deposits in laminated mud layers from the Lake Harutori, Pacific coast of Hokkaido, Northeast Japan, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 538 173-178, 2023.05

Toshimichi Nakanishi, Futoshi Nanayama, Yasuo Kondo, Keitaro Yamada, Keisuke Sakai, Tatsuhiko Yamaguchi, Kiyoyuki Shigeno, Kota Katsuki, Hirokuni Oda, Ryuta Furukawa, Wan Hong

Multiple Authorship (Including Foreigners)

Reconstruction of vegetation changes on Atiu Island, southern Cook Islands, East Polynesia, based on pollen analysis: Verification of human impacts, The Quaternary Research (Daiyonki-Kenkyu), 63(2) , 2023

Toshiyuki Fujiki, Keisuke Sakai, Mitsuru Okuno

Multiple Authorship (Only Japanese)

Salinity, oxygen isotope, hydrogen isotope, and radiocarbon of coastal seawater of North Japan, GEOCHEMICAL JOURNAL, 2022

Kaoru Kubota, Keisuke Sakai, Ken’ichi Ohkushi, Tomihiko Higuchi, Kotaro Shirai, Masayo Minami

Multiple Authorship (Only Japanese)

Ocean hypoxia in the northwestern Pacific from foraminiferal analysis since the last deglaciation, CHIKYU MONTHLY / SPECIAL, 71 112-117, 2022.02

Keisuke Sakai, Ken'ichi Ohkushi

Human arrival age and paleovegetational change in Atiu Island, South Cook Islands, east Polynesia, (70) 38-43, 2021.05

Paleovegetational history on Mangaia, south Cook Islands, eastern Polynesia, The Nagoya University bulletin of chronological research, (5) 30-37, 2021.03

Morikawa Genta, Fujiki Toshiyuki, Sakai Keisuke, Okuno Mitsuru, Moriwaki Hiroshi, Nakamura Toshio

Grant-in-Aid for Scientific Research(A)，2025.04 - 2030.03

Grant-in-Aid for Young Scientists，2025.04 - 2029.03

Grant-in-Aid for Research Activity start-up，2024.07 - 2026.03

Grant-in-Aid for JSPS Fellows，2022.04 - 2024.03