MASAAKI MIYAHARA

Last Updated :2026/07/03

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
E-mail
miyaharahiroshima-u.ac.jp
Self-introduction
I am working on a fine-grained material in a meteorite to elucidate planetary evolution.

Basic Information

Academic Degrees

  • Doctor of Science, Hiroshima University
  • Master of Science, Hiroshima University

Educational Activity

  • [Bachelor Degree Program] School of Science : Earth and Planetary Systems Science : Earth and Planetary Systems Science
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Earth and Planetary Systems Science Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Earth and Planetary Systems Science Program

Research Fields

  • Mathematical and physical sciences;Earth and planetary science;Geochemistry / Cosmochemistry

Research Keywords

  • meteorite
  • planetesimal collision
  • high-pressure minerals
  • electron microscope

Affiliated Academic Societies

  • Mineralogical Society of America
  • The Japanese Society for Planetary Sciences
  • Japan Geoscience Union
  • Japan Association of Mineralogical Sciences
  • The Japan society of High Pressure Science and Technology
  • The Meteoritical Society

Educational Activity

Course in Charge

  1. 2026, Liberal Arts Education Program1, Intensive, Introduction to Science
  2. 2026, Liberal Arts Education Program1, Intensive, Introduction to Science
  3. 2026, Liberal Arts Education Program1, 2Term, Earth Science A
  4. 2026, Liberal Arts Education Program1, 1Term, Earth Science A
  5. 2026, Liberal Arts Education Program1, 1Term, Introductory Seminar for First-Year Students
  6. 2026, Undergraduate Education, Second Semester, Field Excursion for Earth Science B
  7. 2026, Undergraduate Education, First Semester, Special Study for Graduation
  8. 2026, Undergraduate Education, Second Semester, Special Study for Graduation
  9. 2026, Undergraduate Education, First Semester, Special Study for Graduation
  10. 2026, Undergraduate Education, 3Term, Exercise of Astronomy & Planetary Science
  11. 2026, Undergraduate Education, 1Term, Material evolution in the solar system
  12. 2026, Undergraduate Education, 2Term, Experiments in General Geology A
  13. 2026, Graduate Education (Master's Program) , 3Term, Survey of Earth and Planetary Systems Science
  14. 2026, Graduate Education (Master's Program) , First Semester, Exercise for Globalization I
  15. 2026, Graduate Education (Master's Program) , Second Semester, Exercise for Globalization II
  16. 2026, Graduate Education (Master's Program) , Year, Integrated Seminar on Earth and Planetary Systems Science
  17. 2026, Graduate Education (Master's Program) , First Semester, Midterm Exercise for Earth and Planetary Systems Science
  18. 2026, Graduate Education (Master's Program) , First Semester, Special Exercise for Earth and Planetary Systems Science A
  19. 2026, Graduate Education (Master's Program) , Second Semester, Special Exercise for Earth and Planetary Systems Science B
  20. 2026, Graduate Education (Master's Program) , Year, Special Study for Earth and Planetary Systems Science
  21. 2026, Graduate Education (Doctoral Program) , Year, Special Study for Earth and Planetary Systems Science

Research Activities

Academic Papers

  1. Experimental constraints on the shock history of CI chondrites and Ryugu grains, EARTH AND PLANETARY SCIENCE LETTERS, 668, 20251015
    Link to Paper Search Results by DOI
  2. Olivine-ringwoodite transformation in Katol meteorite: implications for localized superheating of chondritic melt and seismic attenuation, PROGRESS IN EARTH AND PLANETARY SCIENCE, 12(1), 20250915
    Link to Paper Search Results by DOI
  3. Progressive change in dislocation microstructures in shocked calcite with pressure: Characterization of micrometeoroid bombardment on asteroid Ryugu, AMERICAN MINERALOGIST, 110(6), 945-955, 20250626
    Link to Paper Search Results by DOI
  4. The nature and formation of silica minerals in eucrite meteorites: Insight into the protoplanetary magma crystallization, METEORITICS & PLANETARY SCIENCE, 60(11), 2529-2559, 202511
    Link to Paper Search Results by DOI
  5. Djerfisherite in a Ryugu grain: A clue to localized heterogeneous conditions or material mixing in the early solar system, METEORITICS & PLANETARY SCIENCE, 60(7), 1666-1673, 202507
    Link to Paper Search Results by DOI
  6. Location of NWA 6148 and NWA 10153 in the nakhlite body and their aqueous alteration, METEORITICS & PLANETARY SCIENCE, 60(3), 596-615, 202503
    Link to Paper Search Results by DOI
  7. Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu, METEORITICS & PLANETARY SCIENCE, 59(12), 3181-3192, 202412
    Link to Paper Search Results by DOI
  8. Phyllosilicates with embedded Fe-based nanophases in Ryugu and Orgueil, METEORITICS & PLANETARY SCIENCE, 59(8), 1947-1965, 202408
    Link to Paper Search Results by DOI
  9. Influx of nitrogen-rich material from the outer Solar System indicated by iron nitride in Ryugu samples, NATURE ASTRONOMY, 8(2), 202402
    Link to Paper Search Results by DOI
  10. Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro- to nano-scale, Meteoritics & Planetary Science, 59(8), 2023-2043, 2024
    Link to Paper Search Results by DOI
  11. Four-dimensional-STEM analysis of the phyllosilicate-rich matrix of Ryugu samples, Meteoritics & Planetary Science, 59(8), 2002-2022, 2024
    Link to Paper Search Results by DOI
  12. In situ investigation of an organic micro-globule and its mineralogical context within a Ryugu sand grain., Meteoritics & Planetary Science, 59(8), 1983-2001, 2024
    Link to Paper Search Results by DOI
  13. Nonequilibrium spherulitic magnetite in the Ryugu samples, GEOCHIMICA ET COSMOCHIMICA ACTA, 346, 65-75, 20230401
    Link to Paper Search Results by DOI
  14. Mn-Precipitates Found in a Martian Crustal Rock, JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 128(9), 202309
    Link to Paper Search Results by DOI
  15. A history of mild shocks experienced by the regolith particles on hydrated asteroid Ryugu, NATURE ASTRONOMY, 7(6), 669-677, 202306
    Link to Paper Search Results by DOI
  16. A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu, NATURE ASTRONOMY, 7(2), 170-+, 202302
    Link to Paper Search Results by DOI
  17. Apollo 15 regolith breccia provides first natural evidence for olivine incongruent melting, AMERICAN MINERALOGIST, 107(9), 1661-1667, 20220927
    Link to Paper Search Results by DOI
  18. Back-transformation processes in high-pressure minerals: implications for planetary collisions and diamond transportation from the deep Earth, PROGRESS IN EARTH AND PLANETARY SCIENCE, 9(1), 20220421
    Link to Paper Search Results by DOI
  19. Vesicular Olivines and Pyroxenes in Shocked Kamargaon L6 Chondrite: Implications for Primary Volatiles and Its Multiple Impacts History, JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 127(11), 202211
    Link to Paper Search Results by DOI
  20. Natural and experimental high-pressure, shock-produced terrestrial and extraterrestrial materials, PROGRESS IN EARTH AND PLANETARY SCIENCE, 8(1), 20211018
    Link to Paper Search Results by DOI
  21. Natural Fe-bearing aluminous bridgmanite in the Katol L6 chondrite, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 118(40), 20211005
    Link to Paper Search Results by DOI
  22. Shock-Induced Incongruent Melting of Olivine in Kamargaon L6 Chondrite, GEOPHYSICAL RESEARCH LETTERS, 48(12), 20210628
    Link to Paper Search Results by DOI
  23. Poirierite, a dense metastable polymorph of magnesium iron silicate in shocked meteorites, COMMUNICATIONS EARTH & ENVIRONMENT, 2(1), 20210122
    Link to Paper Search Results by DOI
  24. Elucidation of impact event recorded in the lherzolitic shergottite NWA 7397, METEORITICS & PLANETARY SCIENCE, 56(9), 1729-1743, 202109
    Link to Paper Search Results by DOI
  25. Complicated pressure-temperature path recorded in the eucrite Padvarninkai, METEORITICS & PLANETARY SCIENCE, 56(8), 1443-1458, 202108
    Link to Paper Search Results by DOI
  26. Chondrule Flattening by Shock Recovery Experiments on Unequilibrated Chondrites, JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 126(8), 202108
    Link to Paper Search Results by DOI
  27. Systematic investigations of high-pressure polymorphs in shocked ordinary chondrites, METEORITICS & PLANETARY SCIENCE, 55(12), 2619-2651, 202012
    Link to Paper Search Results by DOI
  28. Phase and melting relations of Fe3C to 300 GPa and carbon in the core, Carbon in Earth's interior, Geophysical Monograph Series, 249, 25-36, 2020
    Link to Paper Search Results by DOI
  29. Back transformation mechanisms of ringwoodite and majorite in an ordinary chondrite, Meteoritics and Planetary Science, 2020
    Link to Paper Search Results by DOI
  30. Evidence for early impact on a hot differentiated planetesimal from Al-rich micro-inclusions in ungrouped achondrite Northwest Africa 7325, GEOCHIMICA ET COSMOCHIMICA ACTA, 258, 310-335, 20190801
    Link to Paper Search Results by DOI
  31. Olivine melting at high pressure condition in the chassignite Northwest Africa 2737, Physics of the Earth and Planetary Interiors, 291, 1-11, 2019
    Link to Paper Search Results by DOI
  32. Discovery of moganite in a lunar meteorite as a trace of water ice in the Moon’s subsurface, Science Advances, 4(5), 2018
    Link to Paper Search Results by DOI
  33. Jadeite in shocked meteorites and its textural variations, JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES, 112(5), 247-255, 201710
    Link to Paper Search Results by DOI
  34. Shock-induced thermal history of an EH3 chondrite, Asuka 10164., Meteoritics & Planetary Science, 52, 24-35, 2017
    Link to Paper Search Results by DOI
  35. Spherulite-like jadeite growth in shock-melt veins of the Novosibirsk H5/6 chondrite, Russian Geology and Geophysics, 58, 12-19, 2017
    Link to Paper Search Results by DOI
  36. Shock-induced P-T conditions and formation mechanism of akimotoite-pyroxene glass assemblages in the Grove Mountains (GRV) 052082 (L6) meteorite., American Mineralogist, 102, 1254-1262, 2017
    Link to Paper Search Results by DOI
  37. Origin of EL3 chondrites: Evidence for variable C/O ratios during their course of formation—A state of the art scrutiny, Meteoritics and Planetary Science, 52, 781-806, 2017
    Link to Paper Search Results by DOI
  38. Albite dissociation reaction in the Northwest Africa 8275 shocked LL chondrite and implications for its impact history, Geochimica et Cosmochimica Acta, 217, 320-333, 2017
    Link to Paper Search Results by DOI
  39. High-pressure minerals in shocked meteorites., Meteoritics and Planetary Science, 52, 2017-2039, 2017
    Link to Paper Search Results by DOI
  40. Spin state and electronic environment of iron in basaltic glass in the lower mantle, American Mineralogist, 102, 2106-2112, 2017
    Link to Paper Search Results by DOI
  41. Spatially resolved distribution of Fe species around microbes at the submicron scale in natural bacteriogenic iron oxides., Microbes and Environments, 32, 283-287, 2017
    Link to Paper Search Results by DOI
  42. High-pressure polymorphs in Yamato-790729 L6 chondrite and their significance for collisional conditions., Meteoritics and Planetary Science, 52(12), 2570-2585, 2017
    Link to Paper Search Results by DOI
  43. Discovery of natural MgSiO3 tetragonal garnet in a shocked chondritic meteorite, Science Advances, 2(e1501725), 2016
    Link to Paper Search Results by DOI
  44. Phase transition processes of olivine in the shocked Martian meteorite Tissint: Clues to origin of ringwoodite-, bridgmanite- and magnesiowüstite-bearing assemblages, Physics of the Earth and Planetary Interiors, 259, 18-28, 2016
    Link to Paper Search Results by DOI
  45. ★, Discovery of stishovite in Apollo 15299 sample, American Mineralogist, 100, 1308-1311, 2015
    Link to Paper Search Results by DOI
  46. ★, Unique large diamonds in a ureilite from Almahata Sitta 2008 TC3 asteroid, Geochimica et Cosmochimica Acta, 163, 14-26, 2015
    Link to Paper Search Results by DOI
  47. Stability of a hydrous delta-phase, AlOOH-MgSiO2(OH)(2), and a mechanism for water transport into the base of lower mantle, Earth and Planetary Science Letters, 401, 12-17, 20140901
    Link to Paper Search Results by DOI
  48. ★, Discovery of coesite and stishovite in eucrite, Proceedings of the National Academy of Sciences U.S.A., 111(30), 10939-10942, 20140729
    Link to Paper Search Results by DOI
  49. The abundance of potassium in the Earth's core, Physics of the Earth and Planetary Interiors, 237, 65-72, 201412
    Link to Paper Search Results by DOI
  50. ★, Jadeite in Chelyabinsk meteorite and the nature of an impact event on its parent body, Scientific Reports, 4, 2014
    Link to Paper Search Results by DOI
  51. ★, NanoSIMS analysis of organic carbon from the Tissint Martian meteorite: Evidence for the past existence of subsurface organic-bearing fluids on Mars, Meteoritics and Planetary Science, 49, 2201-2218, 2014
    Link to Paper Search Results by DOI
  52. エポックメイキングな隕石たち（その5）：Almahata Sitta隕石～落ちてきた不均質小惑星“2008 TC3”～, Planetary people, 23, 382-385, 2014
  53. Jadeite formation in shocked ordinary chondrites, Earth and Planetary Science Letters, 373, 102-108, 20130401
    Link to Paper Search Results by DOI
  54. Shock-induced deformation of Shergottites: Shock-pressures and perturbations of magmatic ages on Mars, Geochimica et Cosmochimica Acta, 101, 233-262, 20130101
  55. ★, Discovery of seifertite in a shocked lunar meteorite, Nature Communications, 4, 2013
    Link to Paper Search Results by DOI
  56. Formation mechanisms of high-pressure polymorphs in shocked meteorites, 地球化学, 47, 45-52, 2013
  57. Melting relationships in the Fe-Fe3S system up to the outer core conditions, Earth and Planetary Science Letters, 359-360, 26-33, 20120901
  58. Discovery of Hg-Cu-bearing metal-sulfide assemblages in a primitive H-3 chondrite: Towards a new insight in early solar system processes, Earth and Planetary Science Letters, 349-350, 261-271, 20120801
  59. High-pressure minerals in the Earth and planetary materials, Japanese magazine of mineralogical and petrological sciences, 41, 87-100, 2012
  60. Petrography of Yamato 984028 lherzolitic shergottite and its melt vein: implications for its shock metamorphism and origin of the vein, Polar Science, 4, 550-557, 20110901
  61. Evidence for multiple dynamic events and subsequent decompression stage recorded in a shock vein, Earth and Planetary Science Letters, 307, 361-368, 20110501
  62. The transformation of olivine induced by a planetesimal collision, Planetary people, 20, 147-153, 20110501
  63. ★, Natural dissociation of olivine to (Mg,Fe)SiO3 perovskite and magnesiowustite in a shocked Martian meteorite, Proceedings of the National Academy of Sciences U.S.A., 108, 5999-6003, 20110401
  64. ★, Coesite and Stishovite in a shocked lunar meteorite, Asuka-881757, and impact events in lunar surface., Proceedings of the National Academy of Sciences U.S.A., 108, 463-466, 2011
    Link to Paper Search Results by DOI
  65. Coherent and subsequent incoherent ringwoodite growth in olivine of shocked L6 chondrites, Earth and Planetary Science Letters, 295, 321-327, 2010
    Link to Paper Search Results by DOI
  66. Inhibition of subduction thrust earthquakes by low-temperature plastic flow in serpentine, Earth and Planetary Science Letters, 295, 349-357, 2010
  67. The partitioning of oxygen between the Earth's mantle and core. , Journal of Geophysical Research , 115, B02202, 2010
  68. ★, Fractional crystallization of olivine melt inclusion in shock-induced chondritic melt vein, Physics of the Earth and Planetary Interiors, 177, 116-121, 2009
  69. Kushiroite, CaAlAlSiO6: A new mineral of the pyroxene group from the ALH 85085 CH chondrite and its genetic significance in refractory inclusions, American Mineralogist, 94, 1479-1482, 2009
  70. Transformation textures, mechanisms of formation of high-pressure minerals in shock melt veins of L6 chondrites, and pressure-temperature conditions of the shock events, Meteoritics and Planetary Science, 44, 1771-1786, 2009
  71. Fe-Mg partitioning between perovskite and ferropericlase at the lower mantle, American Mineralogist, 94, 921-925, 2009
  72. Application of FIB system to ultra-high-pressure Earth science, Journal of Mineralogical and Petrological Sciences, 103, 88-93, 2008
  73. ★, Evidence for fractional crystallization of wadsleyite and ringwoodite from olivine melts in chondrules entrained in shock-melt veins, Proceedings of the National Academy of Sciences U.S.A., 105, 8542-8547, 2008
  74. Iron speciation in fault gouge from the Ushikubi fault zone central Japan, Hyperfine Interaction, 186, 39-52, 2008
  75. Iron oxide precipitate in seepage of groundwater from a landslide slip zone, Environmental Geology, 51, 1455-1464, 2007
  76. Iron speciation and mineral characterization of contaminated sediments by coal mining drainage in Neath Canal, South Wales, United Kingdom , Geochemical Journal, 41, 463-474, 2007
  77. Silicon-substituted magnetite and accompanying iron oxides and hydroxides from the Kumano mine, Yamaguchi Prefecture, Japan: Reexamination of the so-called maghemite (γ-Fe2O3) , Journal of Mineralogical and Petrological Sciences,, 102, 182-193, 2007
  78. マサ化花崗岩に発達する粘土細脈について－六甲花崗岩での調査事例－, Journal of the Japan Landslide Society, 43, 70-76, 2006
  79. Chlorite exhibits a little swelling property formed in green rock distributed in the Nishinotani landslide area, Ehime, SW Japan, Journal of the Japan Landslide Society, 42, 69-73, 2005
  80. Chlorite in metabasites from the Mikabu and North-Chichibu belts, Southwest Japan, Clays and Clay Minerals, 53, 466-477, 2005
  81. 四国中央部の三波川, 御荷鉾及び秩父帯に産する粘土鉱物について-善徳, 怒田・八畝, 蔭, 西の谷地すべり及び桧山トンネルより得られたボーリングコアの分析結果, Journal of the Japan Landslide Society, 42, 53-60, 2005
  82. The simple preparation technique of a fragile specimen for HRTEM observation , Clay Science, 12, 271-275, 2004
  83. 四国，中央構造線沿いの熱水変質帯における地すべりの初期発生機構－ミクロの見地から－, Journal of the Japan Landslide Society, 41, 33-42, 2004
  84. 御荷鉾緑色岩類中の地すべり地に生成する粘土鉱物－怒田・八畝、蔭地すべり地 , Journal of the Clay Science Society of Japan, 42, 81-88, 2002
  85. 2001年3月24日に発生した芸予地震災害速報－広島県における地震災害－, Journal of the Clay Science Society of Japan, 40, 249-255, 2001

Invited Lecture, Oral Presentation, Poster Presentation

  1. Progressive change in dislocation microstructures in shocked calcite with pressure, Naotaka Tomioka, Kosuke Kurosawa, Akira Miyake, Yohei Igami, Takayoshi Nagaya, Takaaki Noguchi, Toru Matsumoto, Masaaki Miyahara, Seto Yusuke, JpGU Meeting 2025, 2025/05/28, Without Invitation, Japanese, JpGU, Makuhari
  2. DISLOCATION MICROSTRUCTURES IN EXPERIMENTALLY SHOCKED CALCITE: COMPARISON WITH CALCITE IN AN ASTEROID RYUGU PARTICLE., N. Tomioka, K. Kurosawa, A. Miyake, Y. Igami, T. Nagaya, T. Noguchi, T. Matsumoto, M. Miyahara, and Y. Seto, The 87th Annual Meeting of the Meteoritical Society, 2025/07/14, Without Invitation, English, the Meteoritical Society, Perth, Australia
  3. Formation and evolution of the CY chondrite parent body, Yuto Takaki, Masaaki Miyahara, Akira Yamaguchi, and Naotaka Tomioka, The 16th Symposium on Polar Science, 2025/12/04, Without Invitation, English, NIPR, Tachikawa, Japan
  4. Relationship between shock history and radiometric dating of Martian meteorite, Hisanori Higuchi, Masaaki Miyahara, Takeshi Sakai, Naotaka Tomioka, Akira Yamaguchi, The 16th Symposium on Polar Science, 2025/12/04, Without Invitation, English, NIPR, Tachikawa, Japan
  5. Alkaline-rich accessory minerals in Ryugu grain and Orgueil CI chondrite, Masaaki Miyahara, Takaaki Noguchi, Akira Yamaguchi, Toru Nakahashi, Yuto Takaki, Naotaka Tomioka, Toru Matsumoto, Akira Miyake, Yohei Igami, and Yusuke Seto, The 15th Symposium on Polar Science, 2024, Without Invitation, English, NIPR, Tachikawa
  6. Hyper-velocity impact phenomena caused by Giant Impact debris-Pressure and temperature conditions probed by impact melt breccia-, Hibiki Toyoshima, Masaaki Miyahara, Akira Yamaguchi, Takeshi Sakai, and Naotaka Tomioka, The 15th Symposium on Polar Science, 2024, Without Invitation, English, NIPR, Tachikawa
  7. Role of ferropericlase and akimotoite in rheological weakening of subducting slab across the upper and lower mantle boundary, Yuta Goto, Tomoaki Kubo, Rikuto Honda, Yuki Shibazaki, Yu Nishihara, Yuji Higo, Yoshinori Tange, Masaaki Miyahara, Yuta Goto, Tomoaki Kubo, Rikuto Honda, Yuki Shibazaki, Yu Nishihara, Yuji Higo, Yoshinori Tange, Masaaki Miyahara, JpGU meeting 2023, 2023/05/25, Without Invitation, Japanese, JpGU, Makuhari
  8. The olivine-ringwoodite transformation under uniaxial stress: Implications for seismicity and rheological weakening in deep slabs, Rikuto Honda, Tomoaki Kubo, Masaaki Miyahara, Takuya Iwasato, Yuji Higo, Yuta Goto, Yuichiro Mori, Yumiko Tsubokawa, Akio Suzuki, Yuki Shibazaki, Rikuto Honda, Tomoaki Kubo, Masaaki Miyahara, Takuya Iwasato, Yuji Higo, Yuta Goto, Yuichiro Mori, Yumiko Tsubokawa, Akio Suzuki, Yuki Shibazaki, JpGU2023 meeting, 2023/05/25, Without Invitation, Japanese, JpGU, Makuhari
  9. Mild shock metamorphism experienced by surface particles of asteroid Ryugu, Naotaka Tomioka, Akira Yamaguchi, Motoo Ito, Masayuki Uesugi, Naoya Imae, Naoki Shirai, Takuji Ohigashi, Makoto Kimura, Ming-Chang Liu, Richard C Greenwood, Kentaro Uesugi, Aiko Nakato, Kasumi Yogata, Hayato Yuzawa, Yu Kodama, Kaori Hirahara, Ikuya Sakurai, Ikuo Okada, Yuzuru Karouji, Keishi Okazaki, Kosuke Kurosawa, Takaaki Noguchi, Akira Miyake, Masaaki Miyahara, Yusuke Seto, Toru Matsumoto, Yohei Igami, Hayabusa2 Curation Team, Tomohiro Usui, Sei-ichiro Watanabe, Yuichi Tsuda, Naotaka Tomioka, Akira Yamaguchi, Motoo Ito, Masayuki Uesugi, Naoya Imae, Naoki Shirai, Takuji Ohigashi, Makoto Kimura, Ming-Chang Liu, Richard C Greenwood, Kentaro Uesugi, Aiko Nakato, Kasumi Yogata, Hayato Yuzawa, Yu Kodama, Kaori Hirahara, Ikuya Sakurai, Ikuo Okada, Yuzuru Karouji, Keishi Okazaki, Kosuke Kurosawa, Takaaki Noguchi, Akira Miyake, Masaaki Miyahara, Yusuke Seto, Toru Matsumoto, Yohei Igami, Hayabusa2 Curation Team, Tomohiro Usui, Sei-ichiro Watanabe, Yuichi Tsuda, JpGU2023, 2023/05/25, Without Invitation, Japanese, JpGU, Makuhari
  10. The shock recovery experiments of CI chondrites, T. Nakahashi, M. Miyahara, A. Yamaguchi, T. Kobayashi, H. Yusa, N. Tomioka, T. Nakahashi, M. Miyahara, A. Yamaguchi, T. Kobayashi, H. Yusa, N. Tomioka, The 14th Symposium on Polar Science, 2023/11/14, Without Invitation, English, NIPR, Tachikawa
  11. DEHYDRATION DECOMPOSITION OF PHYLLOSILICATES IN THE C-TYPE ASTEROID RYUGU MATERIAL BY SPACE WEATHERING, T. Noguchi, T. Matsumoto, A. Miyake, Y. Igami, M. Haruta, H. Saito, S. Hata, Y. Seto, M. Miyahara, N. Tomioka, and 65 authors, 85th Annual Meeting of The Meteoritical Society, 2022/08/18, Without Invitation, English, Glasgow
  12. Vesicular olivines and pyroxenes in shocked Kamargaon L6 Chondrite: Implications for primary volatiles and its multiple impacts history, K. Tiwari, S. Ghosh, M. Miyahara, D. Ray, 85th Annual Meeting of The Meteoritical Society, 2022/08/18, Without Invitation, English, Glasgow
  13. Rheological weakening of the lower-mantle slab by superplastic flow of the post-spinel assemblage, Yuta Goto, Tomoaki Kubo, Rikuto Honda, Yu Nishihara, Yuji Higo, Yoshinori Tange, Masaaki Miyahara, Japan Geoscience Union Meeting 2022, 2022/05/26, Without Invitation, English
  14. The olivine-ringwoodite transformation triggers shear localization and shear instability, Rikuto Honda, Tomoaki Kubo, Masaaki Miyahara, Takuya Iwasato, Yuichiro Mori, Yuji Higo, Yuta Goto, Yumiko Tsubokawa, Japan Geoscience Union Meeting 2022, 2022/05/26, Without Invitation, English
  15. Slickenside as a record of shock metamorphism on asteroid Ryugu., M. Miyahara, T. Noguchi, T. Matsumoto, N. Tomioka, A. Miyake, Y. Igami, Y. Seto, T. Nakamura, H. Yurimoto, R. Okazaki, H. Yabuta, H. Naraoka, S. Tachibana, S. Watanabe, Y. Tsuda, and the Hayabusa2 Initial Analysis Sand Team, Hayabusa 2022 symposium, 2022/11/16, Without Invitation, English, Sagamihara
  16. Elucidation of aqueous alteration in the lava units with nakhlites NWA 10153 and NWA 6148., K. Kukihara, M. Miyahara, A. Yamaguchi, Y. Takahashi, Y. Takeichi, N. Tomioka, and E. Ohtani, The 13th Symposium on Polar Science, 2022/11/17, Without Invitation, English, Tachikawa
  17. Space weathering of anhydrous minerals in regolith samples from the c-type asteroid ryugu, Matsumoto T., Noguchi T., Miyake A., Igami Y., Haruta M., Saito H., Hata S., Seto Y., Miyahara M., Tomioka N., Yurimoto H., Nakamura T., Yabuta H., Naraoka H., Okazaki R., Sakamoto K., Tachibana S., Watanabe S., Tsuda Y., and the Min-Pet Fine Sub-team, 53rd Lunar and Planetary Science Conference, 2022/03/07, Without Invitation, English
  18. Mineralogy and space weathering of fine fraction recovered from asteroid (162173) ryugu., Noguchi T., Matsumoto T., Miyake A., Igami Y., Haruta M., Saito H., Hata S., Seto Y., Miyahara M., Tomioka N., and 56 authors., 53rd Lunar and Planetary Science Conference, 2022/03/07, With Invitation, English
  19. High-pressure minerals in CB carbonaceous chondrites, Miyahara M., Ohtani E., Yamaguchi A., Tomioka N, The 12th Symposium on Polar Science, 2021/11/18, Without Invitation, English
  20. Surface morphologies and space weathering features of Ryugu samples, Matsumoto T., Noguchi T., Miyake A., Igami Y., Haruta M., Saito H., Hata S., Seto Y., Miyahara M., Tomioka N., 50 authors, and the Hayabusa2 Initial Analysis Team, Hayabusa 2021, 2021/11/16, Without Invitation, English
  21. Mineralogy and surface modification of small grains recovered from the asteroid 162173 Ryugu, Noguchi T., Matsumoto T., Miyake A., Igami Y., Haruta M., Saito H., Hata S., Seto Y., Miyahara M., Tomioka N., 50 authors and the Hayabusa2 Initial Aalysis Team, Hayabusa 2021, 2021/11/16, With Invitation, English
  22. The petrological and mineralogical descriptions of nakhlites NWA 6148 and NWA 10153, Kukihara Kakeru, Masaaki Miyahara, Akira Yamaguchi, Yoshio Takahashi, Yasuo Takeichi, Naotaka Tomioka, Eiji Ohtani, Japan Geoscience Union Meeting 2021, 2021/05/30, Without Invitation, English, Japan Geoscience Union, Online
  23. The discovery of Mn-precipitates in nakhlites Yamato 000802, Ayaka Nakamura, Masaaki Miyahara, Hiroki Suga, Akira Yamaguchi, Wakabayashi Daisuke, Shohei Yamashita, Yasuo Takeichi, Yoshio Takahashi, Eiji Ohtani, The 11th Symposium on Polar Science, 2020/12/03, Without Invitation, English, NIPR, Online
  24. Shock and recovery experiments of type 3 ordinary chondrites, Masaaki Miyahara, Junnosuke Edanaga, Akira Yamaguchi, Takamichi Kobayashi, Toshimori Sekine, and Ayaka Nakamura, 2020 Online Meeting Japan Association of Mineralogical Sciences, 2020/09/16, Without Invitation, Japanese
  25. A new Mg2SiO4 polymorph "poirierite" in shocked meteorites and its possible high-pressure synthesis conditions, Naotaka Tomioka, Takuo Okuchi, Luca Bindi, Masaaki Miyahara, Toshiaki Iitaka, Zhi Li, Xiande Xie, Narangoo Purevjav, Kiyoshi Fujino, Tetsuo Irifune, Riho Tani, Yu Kodama, JpGU-AGU joint meeting 2020, 2020/07/13, Without Invitation, English, JpGU
  26. Shock and recovery experiments of petrologic type 3 ordinary chondrite, Masaaki Miyahara, Junnosuke Edanaga, Akira Yamaguchi, Takamichi Kobayashi, Toshimori Sekine, JpGU-AGU joint meeting, 2020/07/13, Without Invitation, English, JpGU
  27. Aqueous alteration in the nakhlites Y 000802, Ayaka Nakamura, Masaaki Miyahara, Hiroki Suga, Akira Yamaguchi, Daisuke Wakabayashi, Shohei Yamashita, Yasuo Takeichi, Yoshio Takahashi, Eiji Ohtani, JpGU-AGU joint meeting, 2020/07/12, Without Invitation, English, JpGU
  28. The investigation of back-transformation mechanisms of ringwoodite and majorite in the Yamato 75267 H6, K. Fukimoto, M. Miyahara, T. Sakai, H. Ohfuji, T. Naotaka, Y. Kodama, E. Ohtani, A. Yamaguchi, The 10th Symposium on Polar Science, 2019/12/05, Without Invitation, English, NIPR, Tachikawa
  29. Elucidation of aqueous alteration of Yamato 000749 based on multi-probe microscopy, Naoki Shiraishi, Hiroki Suga, Masaaki Miyahara, Takuji Ohigashi, Yuichi Inagaki, Akira Yamaguchi, Naotaka Tomioka, Yu Kodama, and Eiji Ohtani, The 10th Symposium on Polar Science, 2019/12/05, Without Invitation, English
  30. The investigation of back-transformation mechanisms of ringwoodite and majorite in the Yamato 75267 H6, Fukimoto K., Miyahara M., Sakai T., Ohfuji H., Naotaka T., Kodama Y., Ohtani E., and Yamaguchi A., The Tenth Symposium on Polar Science, 2019/12/04, Without Invitation, English, National Institute of Polar Research, Tachikawa
  31. Elucidation of back-transformation mechanisms of ringwoodite and majorite occurred in the ordinary chondrite, Kanta FUKIMOTO, Masaaki MIYAHARA, Takeshi SAKAI, Hiroaki OHFUJI, Naotaka TOMIOKA, Yu KODAMA, Eiji OHTANI, and Akira YAMAGUCHI, 2019/10/23, Without Invitation, Japanese
  32. The complex shock metamorphism history recorded in the Padvarninkai, Masaaki Miyahara, Akira Yamaguchi, Eiji Ohtani, 2019/09/20, Without Invitation, Japanese
  33. Uranium-lead systematics of lunar basaltic meteorite Northwest Africa 2977, N. Moromoto, Y. Kawai, S. Yokota, K. Terada, M., Miyahara, N. Takahata and Y. Sano, 82nd Annual Meeting of the meteoritical society, 2019/07/09, Without Invitation, English, The meteoritical society, Sapporo
  34. Topotaxial intergrowths of epsilon-(Mg,Fe)2SiO4 in wadsleyite and ringwoodite in shocked chondrites, N. Tomioka, T. Okuchi, M. Miyahara, T. Iitaka, N. Purevjav, R. Tani, and Y. Kodama, 82nd Annual Meeting of the meteoritical society, 2019/07/09, Without Invitation, English, The Meteoritical Society, Sapporo
  35. Shock-induced melting and high-pressure polymorphs in lunar basaltic meteorites, M. Miyahara, K. Kozuma, E. Ohtani, A. Yamaguchi, T. Sakai, H. Ohfuji, N. Tomioka, and Y. Kodama, 82nd Annual Meeting of the meteoritical society, 2019/07/09, Without Invitation, English, The meteoritical society, Sapporo
  36. Time-resolved synchrotron X-ray observations of mineral transformations under static pressures: applications to non-equilibrium behaviors in shocked meteorites, T. Kubo and M. Miyahara, Japan Geoscience Union Meeting 2019, 2019/05/29, With Invitation, Japanese, Japan Geoscience Union, Makuhari
  37. Raman spectroscopy of seifertite, M. Kayama, E. Ohtani, M. Miyahara, S. Kaneko, T., Sekine, S. Ozawa, and N. Hirao, Japan Geoscience Union Meeting 2019, 2019/05/29, Without Invitation, English, Japan Geoscience Union, Makuhari
  38. Lattice-shear-induced metastable formation of high-pressure silicates in shocked meteorites, N. Tomioka, T. Okuchi, M. Miyahara, Japan Geoscience Union Meeting 2019, 2019/05/28, With Invitation, English, Japan Geoscience Union, Makuhari
  39. Can high-pressure polymorphs clarify an ordinary chondrite parent-body breakup?, M. Miyahara, A. Yamaguchi, M. Saitoh, K. Fukimoto, T. Sakai, H. Ohfuji, N. Tomioka, Y. Kodama, and E. Ohtani, Japan Geoscience Union Meeting 2019, 2019/05/28, Without Invitation, English, Japan Geoscience Union, Makuhari
  40. The systematic investigations of high-pressure minerals in lunar basaltic meteorites, M. Miyahara, K. Kozuma, E. Ohtani, A. Yamaguchi, T. Sakai, H. Ohfuji, N. Tomioka, Y. Kodama, Japan Geoscience Union Meetin 2019, 2019/05/27, Without Invitation, English, Japan Geoscience Union, Makuhari
  41. The systematic investigations of high-pressure polymorphs in shocked ordinary chondrites, M. Miyahara, A. Yamaguchi, M. Saitoh, K. Fukimoto, T. Sakai, H. Ohfuji, N. Tomioka, Y. Kodama and E. Ohtani, The Ninth Symposium on Polar Science, 2018/12/04, Without Invitation, English, NIPR, Sagamihara city
  42. Aqueous alteration of Yamato 000749 based on multi-probe microscopic observation, Naoki Shiraishi, Hiroki Suga, Masaaki Miyahara, Takuji Ohigashi, Yuichi Inagaki, Akira Yamaguchi, Tomioka Naotaka, Yu Kodama, and Eiji Ohtani, The Ninth Symposium on Polar Science, 2018/12/04, Without Invitation, English, NIPR, Sagamihara city
  43. The systematic investigation of high-pressure polymorphs in ordinary chondrites, Masaaki Miyahara, Akira Yamaguchi, Kanta Fukimoto, Masato Saitoh, Hiroaki Ohfuji, Takeshi Sakai, Eiji Ohtani, Annual meeting of Japan Association of MIneralogical Sicences, 2018/09/19, Without Invitation, Japanese, Japan Association of MIneralogical Sciences, Yamagata city
  44. Complex dynamic episode recorded in Chassignite NWA 2737, Miyahara M., Ohtani E., Nishijima M. and El Goresy A., Japan Geoscience Union meeting 2018, 2018/05/24, Without Invitation, English
  45. Elucidation of aqueous alteration recorded in Yamato 000749, Shiraishi N., Suga H., Miyahara M., Ohigashi T., Inagaki Y., Yamaguchi A., Naotaka T., Kodama Y. and Ohtani E., Japan Geoscience Union meeting 2018, 2018/05/23, Without Invitation, Japanese
  46. Unique occurrences of graphite and diamond in Almahatta Sitta ureilties, Miyahara M., Ohtani E., El Goresy A., Lin Y., Suga H., Ohigashi T., Japan Geoscience Union meeting 2018, 2018/05/22, Without Invitation, English
  47. In-situ characterization of carbon components in the North West Africa 7034, Suga H., Miyahara M., Ito M., Takeichi Y., Yabuta H., Takahashi Y., Ohtani E, The eighth Symposium on Polar Science, 2017/12/07, Without Invitation, English
  48. High-pressure dissociation of olivine in North West Africa 7397 lherzolitic shergottite, Yoshida M., Miyahara M., Yamaguchi A., Tomioka N., Sakai T., Ohfuji H., Maeda F., Ohira I., Ohtani E., Kamada S., Suga H., Ohigashi T., Inagaki Y., The eighth Symposium on Polar Science, 2017/12/07, Without Invitation, English
  49. Shocked type 3 ordinary chondrites, Miyahara M., Yamaguchi A., Ohtani E., Tomioka N, The eighth Symposium on Polar Science, 2017/12/06, Without Invitation, English, NIPR, Tachikawa
  50. Investigations of Martian meteorites with a multiscale microscope, Miyahara M, The multi-scale planetary science workshop, 2017/06/22, With Invitation, English, Paris
  51. Discovery of heavily shocked type 3 ordinary chondrites., Miyahara M., Yamaguchi A., Ohtani E, Japan Geoscience Union meeting 2017, 2017/05/23, Without Invitation, English
  52. Application of a STXM analysis for diamond in ureilite, Miyahara M., Suga H., Ohtani E., Ohigashi T. Inagaki Y, Japan Geoscience Union meeting 2017, 2017/05/23, Without Invitation, English
  53. Shock pressure estimation by high-pressure polymorphs and cathodoluminescence spectra of maskelynite in Yamato-790729 L6 chondrite and their significance for collisional condition, Kato Y., Sekine T., Kayama M., Miyahara M. and Yamaguchi A, Japan Geoscience Union meeting 2017, 2017/05/22, Without Invitation, English
  54. The high-pressure polymorphs in CB type chondrites, M. Miyahara, E. Ohtani, A. Yamaguchi, The 2016 Annual Meeting of Japan Association of Mineralogical Sciences, 2016/09/23, Without Invitation, Japanese, Japan Association of Mineralogical Sciences, Kanazawa
  55. Discovery of coesite, stishovite and seifertite in shocked meteorites and its implication, M. Miyahara, A. Yamaguchi and S. Ozawa, Shock Metamorphism and High Pressure Phases in Meteorites and Terrestrial Impactites, 2016/08/06, With Invitation, English, The meteoritical society, Berlin, Germany
  56. Natural high-pressure polymorphs of silica in shocked meteorites, M.Miyahara, E. Ohtani, International Workshop：New Challenges in Volatile Cycling in the Deep Earth, 2016/07/03, With Invitation, English, Tohoku forum for creativity, Sendai, Japan
  57. Water-rich lunar upper mantle as recorded in lunar meteorites, M. Kayama, S. Nakashima, N. Tomioka, Y. Seto, E. Ohtani, T. Fagan, H. Nagaoka, S. Ozawa, T. Sekine, M. Miyahara, A. Miyake, J. Fukuda , K. Tomeoka, S. Ichimura, M. Matsumoto, K. Suzuki and J. Götze, Japan Geoscience Union meeting 2016, 2016/05/24, Without Invitation, English, Japan Geoscience Union, Makuhari
  58. Petrology and mineralogy of Northwest Africa 7397 lherzolitic shergottite, M. Yoshida, M. Miyahara, T. Sakai, H. Ohfuji and A. Yamaguchi, Japan Geoscience Union 2016, 2016/05/24, Without Invitation, English, Japan Geoscience Union, Makuhari
  59. Origin of water and water reservoirs on the Moon as considered from the perspective of material sciences, M. Kayama, N. Tomioka, E. Ohtani, S. Nakashima, Y. Seto, H. Nagaoka , T. Fagan, J. Götze, A. Miyake, S. Ozawa, T. Sekine, M. Miyahara, M. Matsumoto, N. Shoda, K. Tomeoka, Japan Geoscience Union meeting 2016, 2016/05/24, Without Invitation, English, Japan Geoscience Union, Makuhari
  60. In-situ obsevation of organic matter in the Allende meteorite matrix using X-ray microscopy, H. Suga, Y. Takeichi, C. Miyamoto, M. Miyahara, K. Mase, K. Ono and Y. Takahashi, Japan Geoscience Union meeting 2016, 2016/05/24, Without Invitation, English, Japan Geoscience Union, Makuhari
  61. Characterization of LUNA 24 regolith for deciphering the magmatism history on Mare Crisium, K. Terada, H. Minori, Y. Kawai and M. Miyahara, Japan Geoscience Union meeting 2016, 2016/05/24, Without Invitation, English, Japan Geoscience, Makuhari
  62. A high-pressure polymorph inventory in shocked L type ordinary chondrites, M. Miyahara, A. Yamaguchi, E. Ohtani, M. Saitoh, Japan Geoscience Union meeting 2016, 2016/05/24, Without Invitation, English, Japan Geoscience Union, Makuhari
  63. Application of a FIB system to ultra-high-pressure Earth and planetary sciences., M. Miyahara, E. Ohtani, Applications of FIB (Focused ion beam) Technology” workshop, 2015/02/21, With Invitation, English, HPSTAR, China, Shanghai, China

External Funds

Acceptance Results of Competitive Funds

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