MIZUHO KOIKE

Last Updated :2026/06/09

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
Web Site
https://sites.google.com/view/mizuhokoike/home?authuser=0
https://researchmap.jp/mizuhokoike/
E-mail
mizuhokoikehiroshima-u.ac.jp
Self-introduction
Extraterrestrial materials, including meteorites and returned samples, record the early Solar System and the planetary evolutions. My research aims to elucidate the formation and evolution history of celestial bodies (e.g. asteroids, Mars, and Moon) based on chemical and isotopic analyses of various meteorites.

Basic Information

Academic Degrees

  • The University of Tokyo
  • The University of Tokyo

Research Keywords

  • Martian meteorites & Asteroidal meteorites
  • Surface environments of terrestrial planets
  • Radiometric geochronology (e.g., U-Pb, Hf-W dating)
  • Isotopes & Geochemistry

Educational Activity

Course in Charge

  1. 2026, Liberal Arts Education Program1, 2Term, Earth Science A
  2. 2026, Liberal Arts Education Program1, 1Term, Earth Science A
  3. 2026, Graduate Education (Master's Program) , Intensive, Introduction to Basic Science Researcher
  4. 2026, Undergraduate Education, 4Term, Introduction to Earth and Planetary Sciences B
  5. 2026, Liberal Arts Education Program1, 1Term, Introductory Seminar for First-Year Students
  6. 2026, Undergraduate Education, 3Term, Cosmochemistry and Geochemistry
  7. 2026, Undergraduate Education, First Semester, Special Study for Graduation
  8. 2026, Undergraduate Education, Second Semester, Special Study for Graduation
  9. 2026, Undergraduate Education, 1Term, Practice for Earth and Planetary Materials Science II
  10. 2026, Graduate Education (Master's Program) , 3Term, Survey of Earth and Planetary Systems Science
  11. 2026, Graduate Education (Master's Program) , First Semester, Exercise for Globalization I
  12. 2026, Graduate Education (Master's Program) , Second Semester, Exercise for Globalization II
  13. 2026, Graduate Education (Master's Program) , Year, Integrated Seminar on Earth and Planetary Systems Science
  14. 2026, Graduate Education (Master's Program) , First Semester, Midterm Exercise for Earth and Planetary Systems Science
  15. 2026, Graduate Education (Master's Program) , First Semester, Special Exercise for Earth and Planetary Systems Science A
  16. 2026, Graduate Education (Master's Program) , Second Semester, Special Exercise for Earth and Planetary Systems Science B
  17. 2026, Graduate Education (Master's Program) , Year, Special Study for Earth and Planetary Systems Science
  18. 2026, Graduate Education (Doctoral Program) , Year, Special Study for Earth and Planetary Systems Science

Research Activities

Academic Papers

  1. Elucidation of Asteroidal Crust Evolution Based on U‒Pb and Hf‒W Dating of Differentiated Meteorites, Chikyukagaku (Geochemistry), 59(3), 73-89, 202509
    Link to Paper Search Results by DOI
  2. ★, Identification of carbonate-associated sulfate (CAS) in a Noachian Martian meteorite Allan Hills 84001, EARTH AND PLANETARY SCIENCE LETTERS, 620, 20231015
    Link to Paper Search Results by DOI
  3. ★, Evidence for early asteroidal collisions prior to 4.15 Ga from basaltic eucrite phosphate U-Pb chronology, Earth and Planetary Science Letters, 549, 116497, 202008
    Link to Paper Search Results by DOI
  4. ★, In-situ preservation of nitrogen-bearing organics in Noachian Martian carbonates, Nature Communications, 11, 1988, 202004
    Link to Paper Search Results by DOI
  5. Hf-W dating of zircon in mesosiderite with high-pressure sintered standard, JOURNAL OF ANALYTICAL SCIENCE AND TECHNOLOGY, 15(1), 20240423
    Link to Paper Search Results by DOI
  6. Curation protocol of Phobos sample returned by Martian Moons eXploration, METEORITICS & PLANETARY SCIENCE, 59(2), 321-337, 202402
    Link to Paper Search Results by DOI
  7. Experimentally Shock-Induced Melt Veins in Basalt: Improving the Shock Classification of Eucrites, GEOPHYSICAL RESEARCH LETTERS, 50(1), 20230116
    Link to Paper Search Results by DOI
  8. Shock Recovery With Decaying Compressive Pulses: Shock Effects in Calcite (CaCO3) Around the Hugoniot Elastic Limit, JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 127(6), 202206
    Link to Paper Search Results by DOI
  9. NanoSIMS Analysis of Rare Earth Elements in Silicate Glass and Zircon: Implications for Partition Coefficients, FRONTIERS IN CHEMISTRY, 10, 20220314
    Link to Paper Search Results by DOI
  10. The Importance of Phobos Sample Return for Understanding the Mars-Moon System, Space Science Reviews, 216, 49, 202004
    Link to Paper Search Results by DOI
  11. Migration of D-type asteroids from the outer Solar System inferred from carbonate in meteorites, Nature Astronomy, 3, 910-915, 201907
    Link to Paper Search Results by DOI
  12. Hydrogen isotope analysis of micro-scale apatite inclusions in Archaean zircon grains, Geochemical Journal, 52, 457-466, 2018
  13. Early trace of life from 3.95 Ga sedimentary rocks in Labrador, Canada, Nature, 549, 516-518, 201709
  14. ★, U-Pb and Hf-W dating of young zircon in mesosiderite Asuka 882023, Geophysical Research Letters, 44, 1251-1259, 201701
    Link to Paper Search Results by DOI
  15. Combined investigation of H isotopic compositions and U-Pb chronology of young Martian meteorite Larkman Nunatak 06319, Geochemical Journal, 50, 363-377, 2016
  16. High-spatial resolution U-Pb dating of phosphate minerals in Martian meteorite Allan Hills 84001, Geochemical Journal, 48, 423-431, 2014
  17. Accurate and precise measurements of the D/H ratio and hydroxyl content in lunar aptites using NanoSIMS, Chemical Geology, 337, 48-55, 2013
  18. Current and future contributions of martian meteorites to Mars science, 27, 180-188, 2018
    Link to Paper Search Results by DOI
  19. Analytical protocols for Phobos regolith samples returned by the Martian Moons eXploration (MMX) mission, EARTH PLANETS AND SPACE, 73(1), 20210601
    Link to Paper Search Results by DOI
  20. The Mars system revealed by the Martian Moons eXploration mission, EARTH PLANETS AND SPACE, 74(1), 20220103
    Link to Paper Search Results by DOI

Invited Lecture, Oral Presentation, Poster Presentation

  1. Nitroten and sulfur chemical speciation analyses of Martian meteorites, Mizuho Koike, The 11th HU-JAMSTEC Joint Symposium, 2025/12/05, Without Invitation, Japanese
  2. A potential two-billion-year-old KREEP-rich lunar meteorite, Northwest Africa 16895, M. Koike, R. Sakai, R. Nakada, B. G. Rider-Stokes, K. Sasaki, N. Takahata, The 16th Symposium on Polar Science, Antarctic Meteorites, 2025/12/04, Without Invitation, English
  3. NanoSIMS U–Pb dating of Ca-phosphates in differentiated meteorites, Mizuho Koike, 12th International NanoSIMS Workshop, 2025/10/20, Without Invitation, English
  4. TEXTURAL OBSERVATIONS AND IN-SITU U–PB DATING OF A WINONAITE METEORITE, NORTHWEST AFRICA 13679: INSIGHT INTO THE THERMAL EVO-LUTION OF THE PARENT ASTEROID, R. Sakai, M. Koike, K. Ito, B. G. Rider-Stokes, T. Hirata, 87th Annual Meeting of the Meteoritical Society, 2025/07/14, Without Invitation, English
  5. PETROLOGY OF ROOTLESS TEPHRA SAMPLES FROM LAKE MYVATN, ICELAND: A POTENTIAL MARS ANALOG, M. Koike, R. Sakai, R. Noguchi, 87th Annual Meeting of the Meteoritical Society, 2025/07/14, Without Invitation, English
  6. URANIUM–LEAD DATING OF PHOSPHATE MINERALS IN A MARTIAN AUGITE BASALT, NORTHWEST AFRICA 16895., M. Koike, R. Sakai, K. Sasaki, N. Takahata, 87th Annual Meeting of the Meteoritical Society, 2025/07/14, Without Invitation, English
  7. A petrological study of rootless tephra collected from Myvatn, Iceland, Koike, M., Okayama, T., Noguchi, R., Japan Geoscience Union Meeting 2025, 2025/05/25, Without Invitation, Japanese
  8. Elucidation of thermal history of parent asteroid based on textural observation and in-situ U-Pb dating of winonaite, R. Sakai, M. Koike, K. Ito, B.G., Rider-Stokes, T. Hirata, Japan Geoscience Union Meeting 2025, 2025/05/25, Without Invitation, Japanese
  9. Investigation of Martian environment history based on nitrogen speciation analysis, Mizuho Koike, Ryoichi Nakada, Kento Onishi, Ai Kurokawa, Yuta Sumiya, Haruna Sugahara, Tomohiro Usui, Japan-China Joint Symposium, Annual Meeting of GSJ 2024, 2024/09/19, With Invitation, English
  10. In-situ nitrogen chemical speciation of Martian meteorites for understanding the environmental history of Mars, Japan Geoscience Union Meeting 2024, Without Invitation, Japanese
  11. U–Pb dating of phosphate minerals in a brecciated eucrite Juvinas and a mesosiderite Tanezrouft 091, Japan Geoscience Union Meeting 2024, 2024/05/27, Without Invitation, Japanese
  12. Elucidation of thermal history of winonaite parent asteroid based on textural observation and in-situ U-Pb dating of Northwest Africa 13679, Japan Geoscience Union Meeting 2024, 2024/05/27, Without Invitation, Japanese
  13. An in-situ chronological study of differentiated meteorites to understand the planetary evolution, Mizuho Koike, Annual meeting of The Geochemical Society of Japan 2023, 2023/09, With Invitation, Japanese
  14. A Petrologic Study of a Recently Found Winonaite, Northwest Africa 13679, Koike M., Sakai R., Sumiya Y., Kurokawa A., Onishi K., The 85th Annual Meetings of the Meteoritical Society, 2023/08, Without Invitation, English
  15. Nitrogen Chemical Speciation of Carbonates and Clay Minerals in a Terrestrial Mars Analog, Kurokawa A., Koike M., Nakada R., Tomioka N., Okuchi T., Onishi K., Sumiya Y., Sugahara H., Usui T., and Amunsen E. F., The 85th Annual Meetings of the Meteoritical Society, 2023/08, Without Invitation, Japanese
  16. U-Pb dating of Phosphate Minerals in a Mesosiderite Tanezrouft 091 and a Brecciated Eucrite Juvinas., Sumiya Y., Koike M., Kurokawa A., Onishi K., Kanemaru R., Takahata N., Sano Y., The 85th Annual Meetings of the Meteoritical Society, 2023/08, Without Invitation, English
  17. In-situ nitrogen chemical speciation of alteration minerals in terrestrial Mars analog, Ai Kurokawa, Mizuho Koike, Kento Onishi, Yuta Sumiya, Ryoichi Nakada, Haruna Sugahara, Tomohiro Usui and Hans E.F. Amundsen, Goldschmidt Conference 2023, 2023/07, Without Invitation, English
  18. U-Pb dating of phosphate minerals in a mesosiderite Tanezrouft 091 and a brecciated eucrite Juvinas, Y. Sumiya, M. Koike, A. Kurokawa, K. Onishi, R. Kanemaru, N. Takahata, Y. Sano, 54th Lunar and Planetary Science Conference, 2023/03/13, Without Invitation, English
  19. In-situ nitrogen speciation of shergottite Martian meteorites and terrestrial Mars analog, Koike, M., A. Kurokawa, K. Onishi, R. Nakada, Y. Sumiya, T. Usui, H. Sugahara, H. Amundsen, 4th Lunar and Planetary Science Conference, 2023/03/13, Without Invitation, English
  20. Geochemical and isotopic records in Martian rocks, Koike, M., The 82nd Fujihara Seminar, 2023/02/28, With Invitation, English
  21. Investigation of Mars nitrogen chemistry recorded in Martian meteorites and related samples, Koike, M, Koike, M, Kurokawa, A, Onishi, K, Nakada, R, Sumiya, Y, Usui, T, Sugahara, H, Amundsen, H / Koike, M, Kurokawa, A, Onishi, K, Nakada, R, Sumiya, Y, Usui, T, Sugahara, H, Amundsen, H, 11th ELSI symposium, 2023/03/08, With Invitation, English
  22. Uranium-lead dating of zircon and phosphate minerals in a highly-shocked eucrite Northwest Africa 13166, Sumiya, Y;Koike, M;Onishi, K;Kurokawa, A;Takahata, N;Asanuma, H;Sano, Y, 53rd Lunar and Planetary Science Conference, 2022/03, Without Invitation, English
  23. in-situ detection of the nitrogen-bearing organic materials in 4-billion-year-old carbonates from martian meteorite allan hills 84001, Koike, M., Koike, M., Nakada, R., Kajitani, I., Usui, T., Tamenori, Y., Sugahara, H., and Kobayashi, A., The Ninth International Conference on Mars, 2019, Without Invitation, English
  24. Thermal and impact history of Vesta: Estimate from in-situ U-Pb dating of phosphate minerals in basaltic eucrites., Koike M., Koike M., Iizuka, T., Mikouchi, T., Ono, H., Takahata, N. and Sano, Y., 81st Annual Meeting of the Meteoritical Society, 2018, Without Invitation, English
  25. Combined stepwise heating and vacuum crushing analyses of noble gases in shergottites, Koike M., Koike M., Sumino H., Sano Y. and Ozima M., 48th Lunar and Planetary Science Conference, 2017, Without Invitation, English
  26. U-Pb & Hf-W dating of young zircon in mesosiderite Asuka 882023, Koike M., Koike M., Sugiura N., Takahata, N., Ishida A. and Sano Y., 39th Antarctic Meteorites, 2016, Without Invitation, English
  27. Water in the early differentiated asteroids: Insight from apatite in basaltic eucrites, Koike M., Koike M., Iizuka T., Takahata, N. and Sano Y., 79th Annual Meeting of the Meteoritical Society, 2016, Without Invitation, English

Awards

  1. 2018/03, Research Encouragement Prize for Ph.D. thesis, The University of Tokyo
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External Funds

Acceptance Results of Competitive Funds

  1. Grant-in-Aid for Scientific Research (B), 2026/04, 2030/03
  2. KAKENHI Grant-in-Aid for Scientific Research (A), 2025/04, 2029/03
  3. KAKENHI Grant-in-Aid for Scientific Research (B), 2025/04, 2029/03
  4. KAKENHI Grants-in-Aid for Scientific Research (A), Development of a multi-timescale dating method: towards advanced solar system chronology, 2023/04, 2028/03
  5. KAKENHI Grant-in-Aid for Scientific Research (B), 2021/04, 2024/03
  6. KAKENHI Grant-in-Aid for Scientific Research (A), 2019/04, 2023/03
  7. KAKENHI Grant-in-Aid for Scientific Research (B), 2022/04, 2025/03
  8. Grant-in-Aid for Scientific Research for young researcher, 2019/04, 2021/03
  9. Grant-in-Aid for Scientific Research for JSPS postdoctoral fellow, 2018/04, 2021/03
  10. Grant-in-Aid for Scientific Research for JSPS doctoral student, 2016/04, 2018/03

Social Activities

History as Committee Members

  1. secretary, 2020/08, 2025/03, The Society for the Study of the Origin and Evolution of Life

Organizing Academic Conferences, etc.

  1. The 11th HU-JAMSTEC Joint Symposium, 2025/12, 2025/12
  2. 日本惑星科学会　2023年度秋季講演会, local organizing committee, 2023/10