World's Best Scientists 2026 revealed!
Hiroshi Naraoka

Hiroshi Naraoka

D-Index & Metrics

Environmental Sciences

D-Index
47
Citations
9231
World Ranking
5737
National Ranking
101

Hiroshi Naraoka publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Hiroshi Naraoka sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 307 publications — 87th percentile

87% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Hiroshi Naraoka D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Hiroshi Naraoka sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 47 D-Index — 42nd percentile

42% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Hiroshi Naraoka is affiliated with Kyushu University in Japan and focuses their research on several areas within physics, astronomy, and earth sciences. Their work primarily spans the fields of Physics and Astronomy, Earth and Planetary Sciences, and Environmental Science.

The researcher's main fields of study include:

  • Physics and Astronomy
  • Earth and Planetary Sciences
  • Environmental Science

Within these broader disciplines, Naraoka explores various subfields such as:

  • Astronomy and Astrophysics
  • Ecology
  • Geophysics
  • Spectroscopy
  • Atmospheric Science

Their research topics cover multiple aspects of planetary and environmental sciences, including:

  • Astro and Planetary Science
  • Planetary Science and Exploration
  • Isotope Analysis in Ecology
  • Geological and Geochemical Analysis
  • Mass Spectrometry Techniques and Applications
  • High-pressure geophysics and materials
  • Geology and Paleoclimatology Research

Hiroshi Naraoka has published numerous papers in leading scientific journals. Some recent representative publications are:

  • Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu, 2023, Science
  • Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites, 2022, Science
  • Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth, 2022, Science
  • Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu, 2021, Nature Astronomy
  • Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites, 2022, Nature Communications

These publications reflect ongoing research related to asteroid Ryugu and carbonaceous meteorites, indicating a focus on the molecular and mineralogical analysis of extraterrestrial materials.

Their frequent coauthors include:

  • Shogo Tachibana
  • Kanako Sakamoto
  • Tomoki Nakamura
  • Ryuji Okazaki
  • T. Noguchi

Hiroshi Naraoka's works are often published in influential venues, especially those dedicated to planetary sciences and related fields. Prominent publication venues include:

  • Meteoritics and Planetary Science
  • Nature Communications
  • Science Advances
  • Geochimica et Cosmochimica Acta
  • Earth Planets and Space

Best Publications

  • Compound-specific δD–δ13C analyses of n-alkanes extracted from terrestrial and aquatic plants

    Yoshito Chikaraishi;Hiroshi Naraoka

  • Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu

    Unknown

  • Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites

    Unknown

  • Three-Dimensional Structure of Hayabusa Samples: Origin and Evolution of Itokawa Regolith

    Akira Tsuchiyama;Masayuki Uesugi;Takashi Matsushima;Tatsuhiro Michikami

  • Hydrogen and carbon isotopic fractionations of lipid biosynthesis among terrestrial (C3, C4 and CAM) and aquatic plants

    Yoshito Chikaraishi;Hiroshi Naraoka;Simon R. Poulson

  • Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu

    Unknown

  • δ13C and δD relationships among three n-alkyl compound classes (n-alkanoic acid, n-alkane and n-alkanol) of terrestrial higher plants

    Yoshito Chikaraishi;Hiroshi Naraoka

  • Oxygen isotopic compositions of asteroidal materials returned from Itokawa by the Hayabusa mission.

    Hisayoshi Yurimoto;Ken Ichi Abe;Masanao Abe;Mitsuru Ebihara

  • Irradiation History of Itokawa Regolith Material Deduced from Noble Gases in the Hayabusa Samples

    Keisuke Nagao;Ryuji Okazaki;Tomoki Nakamura;Yayoi N. Miura

  • Carbon and hydrogen isotopic fractionation during lipid biosynthesis in a higher plant (Cryptomeria japonica).

    Yoshito Chikaraishi;Hiroshi Naraoka;Simon R. Poulson

  • A new family of extraterrestrial amino acids in the Murchison meteorite.

    Toshiki Koga;Hiroshi Naraoka

  • Source identification of Malaysian atmospheric polycyclic aromatic hydrocarbons nearby forest fires using molecular and isotopic compositions

    Tomoaki Okuda;Hidetoshi Kumata;Mohamad Pauzi Zakaria;Hiroshi Naraoka

  • Molecular-isotopic stratigraphy of long-chain n-alkanes in Lake Baikal Holocene and glacial age sediments

    David Brincat;Keita Yamada;Ryoshi Ishiwatari;Hitoshi Uemura

  • Carbon and hydrogen isotope variation of plant biomarkers in a plant-soil system

    Yoshito Chikaraishi;Hiroshi Naraoka

  • Macromolecular organic matter in samples of the asteroid (162173) Ryugu

    Unknown

  • Carbon, nitrogen, and sulfur geochemistry of Archean and Proterozoic shales from the Kaapvaal Craton, South Africa

    Yumiko Watanabe;Hiroshi Naraoka;Hiroshi Naraoka;David J. Wronkiewicz;Kent C. Condie

  • A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu

    Unknown

  • Origin of atmospheric polycyclic aromatic hydrocarbons (PAHs) in Chinese cities solved by compound-specific stable carbon isotopic analyses

    Tomoaki Okuda;Hidetoshi Kumata;Hiroshi Naraoka;Hideshige Takada

  • Isotopic evidence from an Antarctic carbonaceous chondrite for two reaction pathways of extraterrestrial PAH formation

    Hiroshi Naraoka;Akira Shimoyama;Kaoru Harada

  • Nucleobase synthesis in interstellar ices

    Yasuhiro Oba;Yoshinori Takano;Hiroshi Naraoka;Naoki Watanabe

  • Molecular distribution of monocarboxylic acids in Asuka carbonaceous chondrites from Antarctica.

    Hiroshi Naraoka;Akira Shimoyama;Kaoru Harada

  • Chemical and biological evolution of early Earth: Constraints from banded iron formations

    Hiroshi Ohmoto;Yumiko Watanabe;Kosei E. Yamaguchi;Hiroshi Naraoka

  • Geochemical and organic carbon isotope studies across the continental Permo-Triassic boundary of Raniganj Basin, eastern India

    A. Sarkar;H. Yoshioka;H. Yoshioka;M. Ebihara;H. Naraoka

  • Hydrogen isotopic fractionations during desaturation and elongation associated with polyunsaturated fatty acid biosynthesis in marine macroalgae.

    Yoshito Chikaraishi;Yaeko Suzuki;Hiroshi Naraoka

  • Molecular and isotopic abundances of long-chain n-fatty acids in open marine sediments of the western North Pacific

    Hiroshi Naraoka;Ryoshi Ishiwatari

  • δ13C and δD identification of sources of lipid biomarkers in sediments of Lake Haruna (Japan)

    Yoshito Chikaraishi;Hiroshi Naraoka

Frequent Co-Authors

Akira Tsuchiyama
Akira Tsuchiyama Ritsumeikan University
Takaaki Noguchi
Takaaki Noguchi Kyoto University
Mitsuru Ebihara
Mitsuru Ebihara Tokyo Metropolitan University
Tomoki Nakamura
Tomoki Nakamura Tohoku University
Keisuke Nagao
Keisuke Nagao University of Tokyo
Hisayoshi Yurimoto
Hisayoshi Yurimoto Hokkaido University
Ryoshi Ishiwatari
Ryoshi Ishiwatari Tokyo Metropolitan University
Minoru Ikehara
Minoru Ikehara Kōchi University
Toshifumi Mukai
Toshifumi Mukai Japan Aerospace Exploration Agency
Trevor Ireland
Trevor Ireland University of Queensland

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Environmental Sciences in the USA opens doors to a variety of interdisciplinary career paths. For those interested in advanced spatial analysis and environmental planning, programs like the best gis graduate programs offer specialized training in Geographic Information Systems (GIS), a crucial tool for managing natural resources and analyzing environmental data.

Policy and administration professionals can enhance their leadership skills through streamlined options such as the 1 year mpa programs. These programs prepare graduates to influence environmental policies, government initiatives, and non-profit management effectively.

Understanding human behavior and societal impacts on the environment can also be explored with a social science perspective. The best online bachelor degree in sociology programs provide a foundation in analyzing social factors crucial to environmental advocacy and community engagement.

For educators and professionals seeking advanced credentials without the burden of lengthy research projects, edd no dissertation programs offer practical doctorates that emphasize applied knowledge over traditional dissertations. This flexibility benefits those aiming to lead educational efforts in sustainability and environmental awareness.

Best Scientists Citing Hiroshi Naraoka

Trending Scientists

Recently Published Articles