HIKARU YABUTA

Last Updated :2025/10/02

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Professor
E-mail
hyabutahiroshima-u.ac.jp
Self-introduction
My main research interest is the chemical evolution of organic matter in asteroids, meteorites and comets. I devoted myself to the carbonaceous asteroid sample return mission, Hayabusa2, and led Organic Macromolecule team in the Initial Analysis as well as contributed to Landing Site Selecetion and Multi-scale Asteroid Science working group.

Basic Information

Major Professional Backgrounds

  • 2002/05, 2002/08, the Graduate University for Advanced Studies
  • 2002/09, 2003/03, National Institute of Advanced Industrial Science and Technology
  • 2003/04, 2005/06, Japan Society for the Promotion of Science
  • 2005/07, 2007/06, Camegie Institution of Washington, Geophysical Laboratory, Postdoctoral Fellow
  • 2007/07, 2008/04, Japan Society for the Promotion of Science
  • 2008/05/01, 2016/12/31, Osaka University, Graduate School of Science, Assistant Professor
  • 2017/01/01, 2019/03/31, Hiroshima University, Graduate School of Science, Associate Professor
  • 2019/04/01, 2020/03/31, Hiroshima University, Graduate School of Science, Professor
  • 2020/04/01, Hiroshima University, Graduate School of Advanced Science and Engineering, Professor
  • 2022/10/01, The International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2), Deputy DIrector

Educational Backgrounds

  • University of Tsukuba, Japan, 1997/04, 2002/03
  • University of Tsukuba, Japan, 1993/04, 1997/03

Academic Degrees

  • University of Tsukuba
  • University of Tsukuba

In Charge of Primary Major Programs

  • Earth and Planetary Systems Science

Research Fields

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

Research Keywords

  • Early Solar System, Organic molecules, Chemical evolution, Asteroids, Comets, Meteorites, Cosmic dusts, Space exploration, Sample return, GCMS, Synchrotron, Scanning transmission x-ray microscope (STXM), High resolution mass spectrometry

Affiliated Academic Societies

  • Japan Geoscience Union (JpGU)
  • The International Society for the Study of the Origin of Life – The International Astrobiology Society (ISSOL)
  • Meteoritical Society
  • Geochemical Society
  • Japanese Society for Origins of Life and Astrobiology
  • Geochemical Society of Japan (GSJ)
  • The Japanese Society of Planetary Sciences
  • The Japanese Association of Organic Geochemists
  • The Chemical Society of Japan

Educational Activity

Course in Charge

  1. 2025, Liberal Arts Education Program1, 2Term, Earth Science A
  2. 2025, Liberal Arts Education Program1, 1Term, Earth Science A
  3. 2025, Liberal Arts Education Program1, 1Term, Carbon-neutral Science and Technology
  4. 2025, Liberal Arts Education Program1, 1Term, Introductory Seminar for First-Year Students
  5. 2025, Undergraduate Education, 4Term, Earth and Planetary Materials Science I
  6. 2025, Undergraduate Education, 2Term, Astrobiology
  7. 2025, Undergraduate Education, First Semester, Practice of Earth and Planetary Systems Science B (Experimental Study)
  8. 2025, Undergraduate Education, First Semester, Special Study for Graduation
  9. 2025, Undergraduate Education, Second Semester, Special Study for Graduation
  10. 2025, Undergraduate Education, Year, Geochemistry and Geophysics Internship
  11. 2025, Undergraduate Education, 3Term, Advanced Earth and Planetary Science
  12. 2025, Undergraduate Education, 3Term, Tectonics of the Earth
  13. 2025, Undergraduate Education, Year, Advanced Subject Research
  14. 2025, Graduate Education (Master's Program) , 3Term, Survey of Earth and Planetary Systems Science
  15. 2025, Graduate Education (Master's Program) , 1Term, Evolution of the Solar System
  16. 2025, Graduate Education (Master's Program) , 1Term, Analytical Techniques for Earth and Planetary Materials Science
  17. 2025, Graduate Education (Master's Program) , First Semester, Exercise for Globalization I
  18. 2025, Graduate Education (Master's Program) , Second Semester, Exercise for Globalization II
  19. 2025, Graduate Education (Master's Program) , Year, Externship for Earth and Planetary Systems Science
  20. 2025, Graduate Education (Master's Program) , Year, Integrated Seminar on Earth and Planetary Systems Science
  21. 2025, Graduate Education (Master's Program) , First Semester, Midterm Exercise for Earth and Planetary Systems Science
  22. 2025, Graduate Education (Master's Program) , First Semester, Special Exercise for Earth and Planetary Systems Science A
  23. 2025, Graduate Education (Master's Program) , Second Semester, Special Exercise for Earth and Planetary Systems Science B
  24. 2025, Graduate Education (Master's Program) , Year, Special Study for Earth and Planetary Systems Science
  25. 2025, Graduate Education (Doctoral Program) , Year, Special Study for Earth and Planetary Systems Science

Research Activities

Academic Papers

  1. Infrared absorption spectra from organic matter in the asteroid Ryugu samples: Some unique properties compared to unheated carbonaceous chondrites, METEORITICS & PLANETARY SCIENCE, 59(8), 1845-1858, 202408
    Link to Paper Search Results by DOI
  2. Three-dimensional multiscale assembly of phyllosilicates, organics, and carbonates in small Ryugu fragments, METEORITICS & PLANETARY SCIENCE, 59(8), 1859-1876, 202408
    Link to Paper Search Results by DOI
  3. Mineralogy and petrology of fine-grained samples recovered from the asteroid (162173) Ryugu, METEORITICS & PLANETARY SCIENCE, 59(8), 1877-1906, 202408
    Link to Paper Search Results by DOI
  4. Compositional heterogeneity of insoluble organic matter extracted from asteroid Ryugu samples, METEORITICS & PLANETARY SCIENCE, 59(8), 1907-1924, 202408
    Link to Paper Search Results by DOI
  5. The iron oxidation state of Ryugu samples, METEORITICS & PLANETARY SCIENCE, 59(8), 1925-1946, 202408
    Link to Paper Search Results by DOI
  6. Neodymium-142 deficits and samarium neutron stratigraphy of C-type asteroid (162173) Ryugu, METEORITICS & PLANETARY SCIENCE, 59(8), 1966-1982, 202408
    Link to Paper Search Results by DOI
  7. In situ investigation of an organic micro-globule and its mineralogical context within a Ryugu "sand" grain, METEORITICS & PLANETARY SCIENCE, 59(8), 1983-2001, 202408
    Link to Paper Search Results by DOI
  8. Four-dimensional-STEM analysis of the phyllosilicate-rich matrix of Ryugu samples, METEORITICS & PLANETARY SCIENCE, 59(8), 2002-2022, 202408
    Link to Paper Search Results by DOI
  9. Hydrogen in magnetite from asteroid Ryugu, METEORITICS & PLANETARY SCIENCE, 59(8), 2058-2072, 202408
    Link to Paper Search Results by DOI
  10. Coevolution of phyllosilicate, carbon, sulfide, and apatite in Ryugu's parent body, METEORITICS & PLANETARY SCIENCE, 59(8), 2073-2096, 202408
    Link to Paper Search Results by DOI
  11. Disequilibrium oxygen isotope distribution among aqueously altered minerals in Ryugu asteroid returned samples, METEORITICS & PLANETARY SCIENCE, 59(8), 2097-2116, 202408
    Link to Paper Search Results by DOI
  12. The Earth atmosphere-like bulk nitrogen isotope composition obtained by stepwise combustion analyses of Ryugu return samples, METEORITICS & PLANETARY SCIENCE, 59(8), 2117-2133, 202408
    Link to Paper Search Results by DOI
  13. Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite, METEORITICS & PLANETARY SCIENCE, 59(8), 2134-2148, 202408
    Link to Paper Search Results by DOI
  14. A comprehensive study of apatite grains in Ryugu rock fragments, METEORITICS & PLANETARY SCIENCE, 59(8), 2149-2165, 202408
    Link to Paper Search Results by DOI
  15. Raman spectroscopy of Ryugu particles and their extracted residues: Fluorescence background characteristics and similarities to CI chondrites, METEORITICS & PLANETARY SCIENCE, 59(8), 2166-2185, 202408
    Link to Paper Search Results by DOI
  16. Iron and copper sulfides in asteroid (162173) Ryugu: Formation conditions and a comparison to the CI and CY chondrites, METEORITICS & PLANETARY SCIENCE, 60(3), 506-528, 202503
    Link to Paper Search Results by DOI
  17. Variations of organic functional chemistry in carbonaceous matter from the asteroid 162173 Ryugu, NATURE COMMUNICATIONS, 15(1), 20240829
    Link to Paper Search Results by DOI
  18. Mineralogy of terminal grains recovered from the Tanpopo capture panel onboard the International Space Station, METEORITICS & PLANETARY SCIENCE, 60(4), 916-927, 202504
    Link to Paper Search Results by DOI
  19. Zirconium isotope composition indicates s-process depletion in samples returned from asteroid Ryugu, METEORITICS & PLANETARY SCIENCE, 60(1), 3-16, 202501
    Link to Paper Search Results by DOI
  20. 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
  21. 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
  22. The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites, SCIENCE ADVANCES, 10(39), 20240927
    Link to Paper Search Results by DOI
  23. Enantioselective three-dimensional high-performance liquid chromatographic determination of amino acids in the Hayabusa2 returned samples from the asteroid Ryugu, JOURNAL OF CHROMATOGRAPHY OPEN, 5, 202405
    Link to Paper Search Results by DOI
  24. 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
  25. Quantification of bulk elemental composition for C-type asteroid Ryugu samples with nondestructive elemental analysis using muon beam, METEORITICS & PLANETARY SCIENCE, 59(8), 2044-2057, 202408
    Link to Paper Search Results by DOI
  26. Breunnerite grain and magnesium isotope chemistry reveal cation partitioning during aqueous alteration of asteroid Ryugu, NATURE COMMUNICATIONS, 15(1), 20240905
    Link to Paper Search Results by DOI
  27. Primordial aqueous alteration recorded in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu, NATURE COMMUNICATIONS, 15(1), 20240710
    Link to Paper Search Results by DOI
  28. Pyrrhotites in asteroid 162173 Ryugu: Records of the initial changes on their surfaces with aqueous alteration, GEOCHIMICA ET COSMOCHIMICA ACTA, 379, 172-183, 20240815
    Link to Paper Search Results by DOI
  29. Three-dimensional textures of Ryugu samples and their implications for the evolution of aqueous alteration in the Ryugu parent body, GEOCHIMICA ET COSMOCHIMICA ACTA, 375, 146-172, 20240615
    Link to Paper Search Results by DOI
  30. 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
  31. Microscale hydrogen, carbon, and nitrogen isotopic diversity of organic matter in asteroid Ryugu, EARTH AND PLANETARY SCIENCE LETTERS, 637, 20240701
    Link to Paper Search Results by DOI
  32. AFM-IR nanospectroscopy of nanoglobule-like particles in Ryugu samples returned by the Hayabusa2 mission, ASTRONOMY & ASTROPHYSICS, 684, 20240424
    Link to Paper Search Results by DOI
  33. Nonmagnetic framboid and associated iron nanoparticles with a space-weathered feature from asteroid Ryugu, NATURE COMMUNICATIONS, 15(1), 20240429
    Link to Paper Search Results by DOI
  34. Correlated IR-SEM-TEM studies of three different grains from Ryugu: From the initial material to post-accretional processes, GEOCHIMICA ET COSMOCHIMICA ACTA, 371, 1-30, 20240415
    Link to Paper Search Results by DOI
  35. The DESTINY+ Dust Analyser - a dust telescope for analysing cosmic dust dynamics and composition, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 382(2273), 20240513
    Link to Paper Search Results by DOI
  36. Microstructural and chemical features of impact melts on Ryugu particle surfaces: Records of interplanetary dust hit on asteroid Ryugu, SCIENCE ADVANCES, 10(3), 20240119
    Link to Paper Search Results by DOI
  37. A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu, NATURE ASTRONOMY, 7(2), 170-+, 202302
    Link to Paper Search Results by DOI
  38. Noble gas mass-spectrometry for extraterrestrial micro-samples: analyses of asteroid matter returned by Hayabusa2 JAXA mission, JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, 38(9), 1785-1797, 20230830
    Link to Paper Search Results by DOI
  39. Interaction between clay minerals and organics in asteroid Ryugu, GEOCHEMICAL PERSPECTIVES LETTERS, 25, 8-12, 20230309
    Link to Paper Search Results by DOI
  40. Formation and Evolution Mechanisms for Organic Matter in Space, ELEMENTS, 20(1), 13-18, 202402
    Link to Paper Search Results by DOI
  41. Nucleosynthetic s-Process Depletion in Mo from Ryugu samples returned by Hayabusa2, GEOCHEMICAL PERSPECTIVES LETTERS, 28, 31-36, 20231220
    Link to Paper Search Results by DOI
  42. Soluble organic matter Molecular atlas of Ryugu reveals cold hydrothermalism on C-type asteroid parent body, NATURE COMMUNICATIONS, 14(1), 20231016
    Link to Paper Search Results by DOI
  43. Evidence of global space weathering by solar wind on asteroid 162173 Ryugu, ICARUS, 406, 202312
    Link to Paper Search Results by DOI
  44. Polycyclic aromatic hydrocarbons in samples of Ryugu formed in the interstellar medium, SCIENCE, 382(6677), 1411-1415, 20231222
    Link to Paper Search Results by DOI
  45. Water circulation in Ryugu asteroid affected the distribution of nucleosynthetic isotope anomalies in returned sample, SCIENCE ADVANCES, 9(45), 20231110
    Link to Paper Search Results by DOI
  46. The Magnesium Isotope Composition of Samples Returned from Asteroid Ryugu, ASTROPHYSICAL JOURNAL LETTERS, 958(2), 20231201
    Link to Paper Search Results by DOI
  47. The thermal history of Ryugu based on Raman characterization of Hayabusa2 samples, ICARUS, 408, 20240115
    Link to Paper Search Results by DOI
  48. Reassigning CI chondrite parent bodies based on reflectance spectroscopy of samples from carbonaceous asteroid Ryugu and meteorites, SCIENCE ADVANCES, 9(49), 20231208
    Link to Paper Search Results by DOI
  49. Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites, ICARUS, 409, 202402
    Link to Paper Search Results by DOI
  50. Analysis of Cation Composition in Dolomites on the Intact Particles Sampled from Asteroid Ryugu, ANALYTICAL CHEMISTRY, 96(1), 170-178, 20231229
    Link to Paper Search Results by DOI
  51. Chemical evolution of primordial salts and organic sulfur molecules in the asteroid 162173 Ryugu, NATURE COMMUNICATIONS, 14(1), 20230918
    Link to Paper Search Results by DOI
  52. Visualization of nanoscale magnetic domain states in the asteroid Ryugu, SCIENTIFIC REPORTS, 13(1), 20230829
    Link to Paper Search Results by DOI
  53. Space weathering acts strongly on the uppermost surface of Ryugu, COMMUNICATIONS EARTH & ENVIRONMENT, 4(1), 20230927
    Link to Paper Search Results by DOI
  54. Carbonate record of temporal change in oxygen fugacity and gaseous species in asteroid Ryugu, NATURE GEOSCIENCE, 16(8), 675-+, 202308
    Link to Paper Search Results by DOI
  55. Abundant presolar grains and primordial organics preserved in carbon-rich exogenous clasts in asteroid Ryugu, SCIENCE ADVANCES, 9(28), 202307
    Link to Paper Search Results by DOI
  56. The Oxygen Isotopic Composition of Samples Returned from Asteroid Ryugu with Implications for the Nature of the Parent Planetesimal, PLANETARY SCIENCE JOURNAL, 4(8), 20230801
    Link to Paper Search Results by DOI
  57. Chondrule-like objects and Ca-Al-rich inclusions in Ryugu may potentially be the oldest Solar System materials, NATURE COMMUNICATIONS, 14(1), 20230216
    Link to Paper Search Results by DOI
  58. Ryugu's Anhydrous Ingredients and Their Spectral Link to Primitive Dust from the Outer Solar System, ASTROPHYSICAL JOURNAL LETTERS, 951(2), 20230701
    Link to Paper Search Results by DOI
  59. Uracil in the carbonaceous asteroid (162173) Ryugu, NATURE COMMUNICATIONS, 14(1), 20230321
    Link to Paper Search Results by DOI
  60. Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu, ASTROPHYSICAL JOURNAL LETTERS, 946(2), 20230401
    Link to Paper Search Results by DOI
  61. Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites, SCIENCE, 379(6634), 786-+, 20230224
    Link to Paper Search Results by DOI
  62. Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples, SCIENCE, 379(6634), 787-+, 20230224
    Link to Paper Search Results by DOI
  63. Extraterrestrial amino acids and amines identified in asteroid Ryugu samples returned by the Hayabusa2 mission, GEOCHIMICA ET COSMOCHIMICA ACTA, 347, 42-57, 20230415
    Link to Paper Search Results by DOI
  64. Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu, SCIENCE, 379(6634), 789-U42, 20230224
    Link to Paper Search Results by DOI
  65. Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution, SCIENCE, 379(6634), 788-U52, 20230224
    Link to Paper Search Results by DOI
  66. Macromolecular organic matter in samples of the asteroid (162173) Ryugu, SCIENCE, 379(6634), 790-U66, 20230224
    Link to Paper Search Results by DOI
  67. MASCOT's in situ analysis of asteroid Ryugu in the context of regolith samples and remote sensing data returned by Hayabusa2, EARTH PLANETS AND SPACE, 75(1), 20230406
    Link to Paper Search Results by DOI
  68. The spatial distribution of soluble organic matter and their relationship to minerals in the asteroid (162173) Ryugu, EARTH PLANETS AND SPACE, 75(1), 20230508
    Link to Paper Search Results by DOI
  69. Nonequilibrium spherulitic magnetite in the Ryugu samples, GEOCHIMICA ET COSMOCHIMICA ACTA, 346, 65-75, 20230401
    Link to Paper Search Results by DOI
  70. Small grains from Ryugu: handling and analysis pipeline for infrared synchrotron microspectroscopy, EARTH PLANETS AND SPACE, 75(1), 20230109
    Link to Paper Search Results by DOI
  71. Contribution of Ryugu-like material to Earth's volatile inventory by Cu and Zn isotopic analysis, NATURE ASTRONOMY, 7(2), 182-189, 202302
    Link to Paper Search Results by DOI
  72. The noble gas and nitrogen relationship between Ryugu and carbonaceous chondrites, GEOCHIMICA ET COSMOCHIMICA ACTA, 345, 62-74, 20230315
    Link to Paper Search Results by DOI
  73. Spectral and Petrographic Properties of Inclusions in Carbonaceous Chondrites and Comparison with In Situ Images from Asteroid Ryugu, PLANETARY SCIENCE JOURNAL, 2(5), 202110
    Link to Paper Search Results by DOI
  74. Spectrophotometric Analysis of the Ryugu Rock Seen by MASCOT: Searching for a Carbonaceous Chondrite Analog, PLANETARY SCIENCE JOURNAL, 2(2), 202104
    Link to Paper Search Results by DOI
  75. Measurement of Microscopic Thermal Diffusivity Distribution for Ryugu Sample by Infrared Lock-in Periodic Heating Method, INTERNATIONAL JOURNAL OF THERMOPHYSICS, 44(4), 202304
    Link to Paper Search Results by DOI
  76. PAHs, hydrocarbons, and dimethylsulfides in Asteroid Ryugu samples A0106 and C0107 and the Orgueil (CI1) meteorite, EARTH PLANETS AND SPACE, 75(1), 20230227
    Link to Paper Search Results by DOI
  77. Chemical composition of carbonaceous asteroid Ryugu from synchrotron spectroscopy in the mid- to far-infrared of Hayabusa2-returned samples, ASTRONOMY & ASTROPHYSICS, 671, 20230227
    Link to Paper Search Results by DOI
  78. Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2, SCIENCE ADVANCES, 8(50), 20221216
    Link to Paper Search Results by DOI
  79. Ryugu's nucleosynthetic heritage from the outskirts of the Solar System, SCIENCE ADVANCES, 8(46), 20221116
    Link to Paper Search Results by DOI
  80. First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu, SCIENCE ADVANCES, 8(46), 20221116
    Link to Paper Search Results by DOI
  81. Antarctic micrometeorite composed of CP and CS IDP-like material: A micro-breccia originated from a partially ice-melted comet-like small body, METEORITICS & PLANETARY SCIENCE, 57(11), 2042-2062, 202211
    Link to Paper Search Results by DOI
  82. Rock Magnetic Characterization of Returned Samples From Asteroid (162173) Ryugu: Implications for Paleomagnetic Interpretation and Paleointensity Estimation, JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 127(11), 202211
    Link to Paper Search Results by DOI
  83. Characterization of the MASCOT landing area by Hayabusa2, ASTRONOMY & ASTROPHYSICS, 666, 20221021
    Link to Paper Search Results by DOI
  84. Trace-element analysis of mineral grains in Ryugu rock fragment sections by synchrotron-based confocal X-ray fluorescence, EARTH PLANETS AND SPACE, 74(1), 20221104
    Link to Paper Search Results by DOI
  85. The Solar System calcium isotopic composition inferred from Ryugu samples, GEOCHEMICAL PERSPECTIVES LETTERS, 24, 20221019
    Link to Paper Search Results by DOI
  86. Rare earth element identification and quantification in millimetre-sized Ryugu rock fragments from the Hayabusa2 space mission, EARTH PLANETS AND SPACE, 74(1), 20220928
    Link to Paper Search Results by DOI
  87. Presolar Stardust in Asteroid Ryugu, ASTROPHYSICAL JOURNAL LETTERS, 935(1), 20220801
    Link to Paper Search Results by DOI
  88. Site selection for the Hayabusa2 artificial cratering and subsurface material sampling on Ryugu, PLANETARY AND SPACE SCIENCE, 219, 20220915
    Link to Paper Search Results by DOI
  89. Presolar Stardust in Asteroid Ryugu, ASTROPHYSICAL JOURNAL LETTERS, 935(1), 20220801
    Link to Paper Search Results by DOI
  90. Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth, SCIENCE, 375(6584), 1011-+, 20220304
    Link to Paper Search Results by DOI
  91. Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu, NATURE ASTRONOMY, 6(2), 214-+, 202202
    Link to Paper Search Results by DOI
  92. ★, Formation of an ultracarbonaceous Antarctic micrometeorite through minimal aqueous alteration in a small porous icy body, GEOCHIMICA ET COSMOCHIMICA ACTA, 214, 172-190, 20171001
    Link to Paper Search Results by DOI
  93. ★, Variation of mineralogy and organic material during the early stages of aqueous activity recorded in Antarctic micrometeorites, GEOCHIMICA ET COSMOCHIMICA ACTA, 208, 119-144, 20170701
    Link to Paper Search Results by DOI
  94. The Camera of the MASCOT Asteroid Lander on Board Hayabusa 2., Space Science Reviews, 208(1-4), 375-400
    Link to Paper Search Results by DOI
  95. A Strategy for Origins of Life Research, Astrobiology, 15, 1031-1042, 2015
    Link to Paper Search Results by DOI
  96. Raman spectroscopic thermometry to carbonaceous material in chondrites: Four-band fitting analysis and expansion of lower temperature limit., J. Mineralogical and Petrological Sciences, 110(6), 276-282, 2015
    Link to Paper Search Results by DOI
  97. Mineralogy and noble-gas isotopes of micrometeorites collected from Antarctic snow., Earth, Planets and Space, 67, 90, 2015
    Link to Paper Search Results by DOI
  98. ToF-SIMS analysis of carbonaceous particles in the sample catcher of the Hayabusa spacecraft., Earth, Planets and Space, 67, 67, 2015
    Link to Paper Search Results by DOI
  99. Investigation of the records of earthquake slip in carbonaceous materials from the Taiwan Chelungpu fault by means of infrared and Raman spectroscopies., Geochemistry, Geophysics, Geosystems, 16, 2015
    Link to Paper Search Results by DOI
  100. A micro-Raman and infrared study of the several Hayabusa category 3 (organic) particles., Earth, Planets and Space, 67, 20, 2015
    Link to Paper Search Results by DOI
  101. ★, X-ray absorption near edge structure spectroscopic study of Hayabusa Category 3 carbonaceous particles, Earth, Planets and Space, 66, 156, 2014
    Link to Paper Search Results by DOI
  102. Sequential analysis of carbonaceous materials in Hayabusa-returned samples for the determination of their origin., Earth, Planets and Space, 66, 102, 2014
    Link to Paper Search Results by DOI
  103. Re-evaluation of frictional heat recorded in the dark gouge of the shallow part of a megasplay fault at the Nankai Trough., Tectonophysics, 626, 157-169, 2014
    Link to Paper Search Results by DOI
  104. Design of a silica-aerogel-based cosmic dust collector for the Tanpopo mission aboard the International Space Station., Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan., 12(ists29), Pk_29-Pk_34, 2014
    Link to Paper Search Results by DOI
  105. Space Exposure of Amino Acids and Their Precursors in the Tanpopo Mission Using the International Space Station., Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan., 12(ists29), Pp_1-Pp_6, 2014
    Link to Paper Search Results by DOI
  106. H, C, and N isotopic compositions of Hayabusa category 3 organic samples., Earth, Planets and Space, 66, 91, 2014
    Link to Paper Search Results by DOI
  107. Exploration of Enceladus' water-rich plumes toward understanding of chemistry and biology of the interior ocean., Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan, 12(ists29), Tk7-Tk11, 2014
    Link to Paper Search Results by DOI
  108. Estimation of slip parameters associated with frictional heating during the 1999 Taiwan Chi-Chi earthquake by vitrinite reflectance geothermometry, Earth, Planets and Space, 66(28), 2014
    Link to Paper Search Results by DOI
  109. Effects of metal ions and pH on the formation and decomposition rates of di- and tri-peptides in aqueous solution., Geochemical Journal, 48, 219-230, 2014
    Link to Paper Search Results by DOI
  110. Characterization of organic aggregates formed by heating products of simulated primitive Earth atmosphere experiments, Chemistry Letters, 41, 441-443, 2012
    Link to Paper Search Results by DOI
  111. Preliminary organic compound analysis of microparticles returned from Asteroid 25143 Itokawa by the Hayabusa mission., Geochemical Journal, 46, 61-72, 2012
    Link to Paper Search Results by DOI
  112. ★, Molecular and isotopic study of the macromolecular organic matter of the ungrouped C2 WIS 91600 and its relationship to Tagish Lake and PCA 91008, Meteoritics and Planetary Science, 45, 1446-1460, 2010
    Link to Paper Search Results by DOI
  113. ★, Multiple polar components in humic acids stabilizing free radicals: carboxyl and nitrogen-containing groups, Organic Geochemistry, 39, 1319-1335, 2008
    Link to Paper Search Results by DOI
  114. Organic thermometry for chondritic parent bodies., Earth and Planetary Science Letters, 272, 445-455, 2008
    Link to Paper Search Results by DOI
  115. Quantitative organic and light element analyses of Comet Wild 2 particles using C-, N-, and O- micro-XANES., Meteoritics and Planetary Science, 43, 353-366, 2008
    Link to Paper Search Results by DOI
  116. The origin and evolution of chondrites recorded in the elemental and isotopic compositions of their macromolecular organic matter., Geochimica et Cosmochimica Acta, 71, 4380-4403, 2007
    Link to Paper Search Results by DOI
  117. ★, The insoluble carbonaceous material of CM chondrites: A possible source of discrete organic compounds under hydrothermal conditions, Meteoritics and Planetary Science, 42, 37-48, 2007
    Link to Paper Search Results by DOI
  118. Organics Captured from Comet Wild 2 by the Stardust Spacecraft, Science, 314, 1720-1724, 2006
    Link to Paper Search Results by DOI
  119. Comet 81P/Wild 2 Under a Microscope. Science, Science, 314, 1711-1716, 2006
    Link to Paper Search Results by DOI
  120. Water solubility enhancement effects of some polychlorinated organic pollutants by dissolved organic carbon from a soil with a higher organic carbon content, Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering, 41, 1483-1494, 2006
    Link to Paper Search Results by DOI
  121. ★, The solid-state 13C NMR characterization of insoluble organic matter from Antarctic CM2 chondrites: Evaluation of the meteoritic alteration level, Meteoritics and Planetary Science, 40, 779-787, 2005
    Link to Paper Search Results by DOI
  122. Quantitative evaluation of interactions between hydrophobic organic pollutants and humic substances, Humic Substances Research, 2, 9-26, 2005
  123. Influence of structural features of humic substances on the partition coefficient of a chlorinated dioxin, Chemosphere, 58, 1319-1326, 2004
    Link to Paper Search Results by DOI
  124. Influence of structural features of humic substances on the partition coefficient of a chlorinated dioxin, Chemosphere, 58, 1319-1326, 2004
    Link to Paper Search Results by DOI
  125. ★, Solid-phase microextraction for the evaluation of partition coefficients of a chlorinated dioxin and hexachlorobenzene into humic substances, Analytical Sciences, 20, 787-791, 2004
    Link to Paper Search Results by DOI
  126. ★, Tetra- and Pentacyclic alkanes in the Cretaceous/Tertiary boundary sediments at Kawaruppu, Hokkaido, Japan, Researches in Organic Geochemistry, 17, 33-43, 2002
  127. Mono- and bicyclic alkanes and diamondoid hydrocarbons in the Cretaceous/Tertiary boundary sediments at Kawaruppu, Hokkaido, Japan, Geochemical Journal, 36, 173-189, 2002
    Link to Paper Search Results by DOI
  128. ★, Detection of mono- and bicyclic alkanes and their characteristics in Neogene sediments of the Shinjo basin, Japan, Geochemical Journal, 36, 31-49, 2002
    Link to Paper Search Results by DOI
  129. Prevalence and nature of heating processes in CM and C2-ungrouped chondrites as revealed by insoluble organic matter, GEOCHIMICA ET COSMOCHIMICA ACTA, 241, 17-37, 20181115
    Link to Paper Search Results by DOI
  130. Organic Molecules and Volatiles in Comets, ELEMENTS, 14(2), 101-106, 201804
    Link to Paper Search Results by DOI
  131. STXM-XANES analyses of Murchison meteorite samples captured by aerogel after hypervelocity impacts: A potential implication of organic matter degradation for micrometeoroid collection experiments, GEOCHEMICAL JOURNAL, 53(1), 53-67, 2019
    Link to Paper Search Results by DOI
  132. Further characterization of carbonaceous materials in Hayabusa-returned samples to understand their origin, METEORITICS & PLANETARY SCIENCE, 54(3), 638-666, 201903
    Link to Paper Search Results by DOI
  133. The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes, SCIENCE, 364(6437), 252-+, 20190419
    Link to Paper Search Results by DOI
  134. Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu-A spinning top-shaped rubble pile, SCIENCE, 364(6437), 268-+, 20190419
    Link to Paper Search Results by DOI
  135. Shock Vaporization/Devolatilization of Evaporitic Minerals, Halite and Gypsum, in an Open System Investigated by a Two-Stage Light Gas Gun, GEOPHYSICAL RESEARCH LETTERS, 46(13), 7258-7267, 20190716
    Link to Paper Search Results by DOI
  136. Images from the surface of asteroid Ryugu show rocks similar to carbonaceous chondrite meteorites, SCIENCE, 365(6455), 817-+, 20190823
    Link to Paper Search Results by DOI
  137. Highly porous nature of a primitive asteroid revealed by thermal imaging, NATURE, 579(7800), 518-522, 202003
    Link to Paper Search Results by DOI
  138. Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution, SCIENCE, 368(6491), 654-+, 20200508
    Link to Paper Search Results by DOI
  139. Organic Matter in the Solar System-Implications for Future on-Site and Sample Return Missions, SPACE SCIENCE REVIEWS, 216(4), 20200512
    Link to Paper Search Results by DOI
  140. Concerns of Organic Contamination for Sample Return Space Missions, SPACE SCIENCE REVIEWS, 216(4), 20200512
    Link to Paper Search Results by DOI
  141. An Another Protocol to Make Sulfur Embedded Ultrathin Sections of Extraterrestrial Small Samples, LIFE-BASEL, 10(8), 202008
    Link to Paper Search Results by DOI
  142. Hayabusa2 Landing Site Selection: Surface Topography of Ryugu and Touchdown Safety, SPACE SCIENCE REVIEWS, 216(7), 20201015
    Link to Paper Search Results by DOI
  143. Collisional history of Ryugu's parent body from bright surface boulders, NATURE ASTRONOMY, 5(1), 202101
    Link to Paper Search Results by DOI
  144. Thermally altered subsurface material of asteroid (162173) Ryugu, NATURE ASTRONOMY, 5(3), 246-+, 202103
    Link to Paper Search Results by DOI
  145. Ryugu's observed volatile loss did not arise from impact heating alone, COMMUNICATIONS EARTH & ENVIRONMENT, 2(1), 20210722
    Link to Paper Search Results by DOI
  146. Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body, NATURE ASTRONOMY, 5(8), 766-+, 202108
    Link to Paper Search Results by DOI
  147. Scientific Targets of Tanpopo: Astrobiology Exposure and Micrometeoroid Capture Experiments at the Japanese Experiment Module Exposed Facility of the International Space Station, ASTROBIOLOGY, 21(12), 1451-1460, 20211201
    Link to Paper Search Results by DOI

Publications such as books

  1. 2019/03/08, Astrobiology: From the Origins of Life to the Search for Extraterrestrial Intelligence, Springer, Scholarly Book, Joint work, 9811336385
  2. 2019/01/15, Handbook of Astrobiology, CRC Press, Scholarly Book, 9781138065123
  3. Primitive Meteorites and Asteroids: Physical, Chemical and Spectroscopic Observations Paving the Way to Exploration, Elsevier, Scholarly Book, Joint work, 0128133252, 558

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, 2024, 2026
  2. KAKENHI(Grant-in-Aid for Challenging Research (Exploratory)), 2021, 2023
  3. KAKENHI(Grant-in-Aid for Scientific Research on Innovative Areas), 2020, 2021
  4. Astrobiology Center Satellite, 2020, 2020
  5. KAKENHI(Grant-in-Aid for Scientific Research on Innovative Areas), 2020, 2021
  6. Astrobiology Center Satellite, 2019, 2019
  7. KAKENHI(Grant-in-Aid for Scientific Research (B)), 2019, 2023
  8. KAKENHI(Grant-in-Aid for Scientific Research on Innovative Areas), 2018, 2019