Hashizume Ko

ハシヅメコウ | Hashizume Ko

Affiliation and department：
Job title： Professor

Research field (1)： Space and planetary science

Research keywords (1)： Isotope Volatile Water Organics Moon Planet Meteorite Early-Earth Life Atmosphere

Research theme for competitive and other funds (11)：

2020 - 2026 深宇宙プローブとしての窒素同位体研究
2022 - 2025 Elucidation of an unique organic matter maturation cycle in the Paleoproterozoic: potential driving force for life diversification
2021 - 2024 イオン注入による新たな超高感度同位体分析手法の開拓
2020 - 2023 イオン注入を利用した二次イオン質量分析法の高感度化への挑戦
2018 - 2021 鉱物へのイオン照射による、同位体分析超高感度化技法の開発

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Papers (59)：

Ko Hashizume, Akizumi Ishida, Ayano Chiba, Ryuji Okazaki, Kasumi Yogata, Toru Yada, Fumio Kitajima, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, et al. The Earth atmosphere-like bulk nitrogen isotope composition obtained by stepwise combustion analyses of Ryugu return samples. Meteoritics & Planetary Science. 2024
Akizumi Ishida, Kouki Kitajima, Ko Hashizume, Michael J. J. Spicuzza, Alexander Zaitsev, Daniel J. J. Schulze, John W. W. Valley. Microscale Simultaneous Measurement of Carbon and Nitrogen Isotopes on Natural Diamond. GEOSTANDARDS AND GEOANALYTICAL RESEARCH. 2023
Ryuji Okazaki, Bernard Marty, Henner Busemann, Ko Hashizume, Jamie D. Gilmour, Alex Meshik, Toru Yada, Fumio Kitajima, Michael Ward Broadley, David Byrne, et al. Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution. Science. 2023. 379. 6634. eabo0431
Hashizume K. Self-shielding effects on isotope fractionation. Encyclopedia of Astrobiology. 2023. pp. 1-2
Hashizume K. Nitrogen isotopes. Encyclopedia of Astrobiology. 2023. pp. 1-5

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MISC (6)：

橋爪光・岡崎隆司. 地球大気のふるさと-リュウグウ試料の揮発性成分分析から見えたその手がかり. 化学と工業. 2024. 77-2. 97-99
石田章純, 笹木晃平, 橋爪光, 掛川武, LEPLAND Aivo. Heterogeneity in nitrogen source for microbial activity recorded in 2.0 Ga Zaonega Formation, NW Russia. 日本地球惑星科学連合大会予稿集(Web). 2020. 2020
圦本尚義, 中村智樹, 伊藤正一, 坂本直哉, 阿部憲一, 橋口未奈子, 片山樹里, 加藤千図, 川崎教行, 小林幸雄, et al. S12-03 イトカワ母天体の熱進化(口頭セッション12:はやぶさ,口頭発表). 日本惑星科学会秋期講演会予稿集. 2011. 2011. 15-15
石田章純, 橋爪光, 掛川武. 段階燃焼法によって明らかにされた初期原生代有機物窒素同位体比の二相性. 日本地球化学会年会講演要旨集. 2011. 58th
YURIMOTO HISAYOSHI, ITO SHOICHI, SAKAMOTO NAOYA, KOBAYASHI SACHIO, HASHIZUME KO, TSUCHIYAMA AKIRA, SETO YUSUKE, IRELAND T. R, ZOLENSKY M, NAKAMURA TOMOKI, et al. 小惑星イトカワの酸素同位体組成,²⁶Al初生存在度,微量元素組成. 日本地球化学会年会講演要旨集. 2011. 58th. 179

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Books (3)：

生命起源の事典
朝倉書店 2024
Water and light element resources on the Moon. In Lunar Science Book, Part 1
Lunar Science Book Editorial Committee 2021
Remaining problems, In Lunar Science Book, part 1.
Lunar Science Book Editorial Committee 2021

Lectures and oral presentations (3)：

CRDS、月へ行く
(湿度、水分計測・センサ研究会創立40周年記念事業講演会 2024)
地球を飛び出せ! 月・小惑星の揮発性成分同位体分析
(第72回質量分析総合討論会 2024)
Nitrogen isotopes in Ryugu return samples revealed by the stepwise combustion analysis, in comparison with CI falls and Antarctic finds
(The 9th Hayabusa Symposium 2022)

Education (3)：

1990 - 1993 The University of Tokyo Graduate School of Science Department of Geophysics
1988 - 1990 The University of Tokyo Graduate School of Science Department of Geophysics
1984 - 1988 Kyoto University Faculty of Science

Professional career (1)：

Work history (4)：

2017/04 - 現在 Ibaraki University Graduate School of Science and Engineering Department of Science
1996/04 - 2017/03 Graduate School of Science, Osaka University Department of Earth and Space Sciences Assistant Professor
1993/07 - 1996/03 Faculty of Science, Osaka University Department of Earth and Space Sciences Assistant Prof
1993/04 - 1993/06 Graduate School of Science, University of Tokyo JSPS Fellow (PD)

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