World's Best Scientists 2026 revealed!

D-Index & Metrics

Earth Science

D-Index
57
Citations
10893
World Ranking
2283
National Ranking
965

Takahiro Hiroi publications per year

1983: 1 publications 1984: 0 publications 1985: 1 publications 1986: 1 publications 1987: 1 publications 1988: 0 publications 1989: 2 publications 1990: 3 publications 1991: 3 publications 1992: 4 publications 1993: 9 publications 1994: 13 publications 1995: 1 publications 1996: 3 publications 1997: 5 publications 1998: 5 publications 1999: 7 publications 2000: 10 publications 2001: 10 publications 2002: 9 publications 2003: 10 publications 2004: 12 publications 2005: 9 publications 2006: 18 publications 2007: 7 publications 2008: 11 publications 2009: 15 publications 2010: 21 publications 2011: 24 publications 2012: 21 publications 2013: 15 publications 2014: 24 publications 2015: 17 publications 2016: 17 publications 2017: 7 publications 2018: 22 publications 2019: 38 publications 2020: 19 publications 2021: 14 publications 2022: 6 publications 2023: 8 publications 2024: 11 publications 2025: 4 publications 2026: 1 publications
1983 2026

439 publications in total across all disciplines

Takahiro Hiroi publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Takahiro Hiroi sits on this spectrum.

38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38 publications 603+

This scientist: 381 publications — 94th percentile

94% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

Takahiro Hiroi D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Takahiro Hiroi sits on this spectrum.

30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 57 D-Index — 76th percentile

76% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

Overview

Takahiro Hiroi is a researcher affiliated with Brown University in the United States. Their work primarily focuses on fields within Physics and Astronomy as well as Earth and Planetary Sciences. Within these broader areas, their subfields include Astronomy and Astrophysics, Ecology, Geophysics, Atmospheric Science, and Mechanics of Materials.

Their research topics cover a diverse set of main themes, notably Astro and Planetary Science, Planetary Science and Exploration, Isotope Analysis in Ecology, Geological and Geochemical Analysis, Geology and Paleoclimatology Research, Laser-induced Spectroscopy and Plasma, and Paleontology and Stratigraphy of Fossils.

Hiroi has authored multiple recent papers, including:

  • Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples (2022, Science)
  • Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution (2020, Science)
  • Asteroid (101955) Bennu in the laboratory: Properties of the sample collected by OSIRIS-REx (2024, Meteoritics and Planetary Science)
  • Thermally altered subsurface material of asteroid (162173) Ryugu (2021, Nature Astronomy)
  • Collisional history of Ryugu's parent body from bright surface boulders (2020, Nature Astronomy)

Frequent collaborators in Hiroi's work include M. Matsuoka, Tomoki Nakamura, Eri Tatsumi, Takanao Saiki, and K. Kitazato. Collaboration with these coauthors indicates ongoing research partnerships and contributions to shared scientific investigations.

Hiroi publishes regularly in several key venues, with repeated contributions to:

  • Icarus
  • Astronomy and Astrophysics
  • Nature Communications
  • Science
  • Nature Astronomy

Best Publications

  • Chelyabinsk airburst, damage assessment, meteorite recovery, and characterization

    Olga P. Popova;Peter Jenniskens;Peter Jenniskens;Vacheslav Emel'yanenko;Anna Kartashova

  • Production of iron nanoparticles by laser irradiation in a simulation of lunar-like space weathering

    Sho Sasaki;Keiko Nakamura;Yoshimi Hamabe;Erika Kurahashi

  • The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes

    S. Sugita;S. Sugita;R. Honda;T. Morota;S. Kameda

  • The global distribution of pure anorthosite on the Moon

    Makiko Ohtake;Tsuneo Matsunaga;Junichi Haruyama;Yasuhiro Yokota

  • Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples

    Unknown

  • The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy

    K. Kitazato;R. E. Milliken;T. Iwata;T. Iwata;M. Abe;M. Abe

  • The Tagish Lake meteorite : A possible sample from a D-type asteroid

    Takahiro Hiroi;Michael E. Zolensky;Carle M. Pieters

  • Possible mantle origin of olivine around lunar impact basins detected by SELENE

    Satoru Yamamoto;Ryosuke Nakamura;Tsuneo Matsunaga;Yoshiko Ogawa

  • Radar-Enabled Recovery of the Sutter’s Mill Meteorite, a Carbonaceous Chondrite Regolith Breccia

    Peter Jenniskens;Peter Jenniskens;Marc D. Fries;Qing-Zhu Yin;Michael Zolensky

  • Thermal metamorphism of the C, G, B, and F asteroids seen from the 0.7 μm, 3 μm, and UV absorption strengths in comparison with carbonaceous chondrites

    Takahiro Hiroi;Michael E. Zolensky;Carlé M. Pieters;Michael E. Lipschutz

  • Simulation of space weathering of planet-forming materials: Nanosecond pulse laser irradiation and proton implantation on olivine and pyroxene samples

    Maho Yamada;Sho Sasaki;Hiroko Nagahara;Akira Fujiwara

  • Vesta, Vestoids, and the howardite, eucrite, diogenite group: Relationships and the origin of spectral differences

    T. H. Burbine;P. C. Buchanan;R. P. Binzel;S. J. Bus

  • Near-Infrared Spectral Results of Asteroid Itokawa from the Hayabusa Spacecraft

    M. Abe;Y. Takagi;K. Kitazato;K. Kitazato;S. Abe

  • Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution

    T. Morota;T. Morota;S. Sugita;S. Sugita;Y. Cho;M. Kanamaru

  • Evidence of thermal metamorphism on the C, g, B, and f asteroids.

    Takahiro Hiroi;Carlé M. Pieters;Michael E. Zolensky;Michael E. Lipschutz

  • Spectral reflectance properties of carbonaceous chondrites: 1. CI chondrites

    E.A. Cloutis;P. Hudon;T. Hiroi;M.J. Gaffey

  • Petrographic, chemical and spectroscopic evidence for thermal metamorphism in carbonaceous chondrites I: CI and CM chondrites

    Eric Tonui;Mike Zolensky;Takahiro Hiroi;Tomoki Nakamura

  • Massive layer of pure anorthosite on the Moon

    S. Yamamoto;R. Nakamura;T. Matsunaga;Y. Ogawa

  • Developing space weathering on the asteroid 25143 Itokawa

    Takahiro Hiroi;Masanao Abe;Kohei Kitazato;Kohei Kitazato;Shinsuke Abe

  • Discoveries on the lithology of lunar crater central peaks by SELENE Spectral Profiler

    Tsuneo Matsunaga;Makiko Ohtake;Junichi Haruyama;Yoshiko Ogawa

  • RELAB (Reflectance Experiment Laboratory): A NASA Multiuser Spectroscopy Facility

    C. M. Pieters;T. Hiroi

Frequent Co-Authors

Carle M. Pieters
Carle M. Pieters Brown University
Naru Hirata
Naru Hirata University of Aizu
Tomoki Nakamura
Tomoki Nakamura Tohoku University
Sho Sasaki
Sho Sasaki Osaka University
Tsuneo Matsunaga
Tsuneo Matsunaga National Institute for Environmental Studies
Tomokatsu Morota
Tomokatsu Morota University of Tokyo
Junichi Haruyama
Junichi Haruyama Japan Aerospace Exploration Agency
Michael E. Zolensky
Michael E. Zolensky National Aeronautics and Space Administration
Janice L. Bishop
Janice L. Bishop Search for Extraterrestrial Intelligence
Yoshiaki Ishihara
Yoshiaki Ishihara Japan Aerospace Exploration Agency

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