World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
55
Citations
11517
World Ranking
12069
National Ranking
898

Koichi Ohno publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Koichi Ohno sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 391 publications — 79th percentile

79% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Koichi Ohno D-index placement in Chemistry in 2026

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

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 55 D-Index — 33rd percentile

33% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Overview

Koichi Ohno is affiliated with the University of Tokyo in Japan and contributes primarily to the fields of physics and chemistry. Their research spans multiple subfields including atomic and molecular physics, optics, spectroscopy, atmospheric science, health toxicology, mutagenesis, and materials chemistry.

The main topics of their scientific work include advanced chemical physics studies, atmospheric chemistry and aerosols, spectroscopy and quantum chemical studies, per- and polyfluoroalkyl substances research, carbon dioxide capture technologies, synthesis and properties of aromatic compounds, and advanced NMR techniques and applications.

Ohno has published several papers in notable scientific journals. Selected recent publications include:

  • "Quantum chemical exploration of polymerized forms of polycyclic aromatic hydrocarbons: D6h tetramer and polymer of coronene" (2020, Chemical Physics Letters)
  • "High performance global exploration of isomers and isomerization channels on quantum chemical potential energy surface of H5C2NO2" (2020, Journal of Computational Chemistry)

Koichi Ohno's frequent coauthors include Takahiro Yamagishi, Hiroshi Yamamoto, Hiroko Satoh, Takeaki Iwamoto, and Yuuki Midoro.

Their work commonly appears in the following journals: Environmental Toxicology and Chemistry, Environmental Science & Technology, Chemical Physics Letters, Journal of Computational Chemistry, and Journal of Veterinary Medical Science.

Best Publications

  • Systematic exploration of the mechanism of chemical reactions: the global reaction route mapping (GRRM) strategy using the ADDF and AFIR methods

    Satoshi Maeda;Koichi Ohno;Keiji Morokuma;Keiji Morokuma

  • Global mapping of equilibrium and transition structures on potential energy surfaces by the scaled hypersphere search method: applications to ab initio surfaces of formaldehyde and propyne molecules.

    Satoshi Maeda;Koichi Ohno

  • A scaled hypersphere search method for the topography of reaction pathways on the potential energy surface

    Koichi Ohno;Satoshi Maeda

  • Global Reaction Route Mapping on Potential Energy Surfaces of Formaldehyde, Formic Acid, and Their Metal-Substituted Analogues

    Koichi Ohno;Satoshi Maeda

  • Intramolecular structures of C 60 molecules adsorbed on the Cu(111)-(1×1) surface

    Tomihiro Hashizume;K. Motai;X. D. Wang;H. Shinohara

  • STUDY OF ELECTRON DISTRIBUTIONS OF MOLECULAR ORBITALS BY PENNING IONIZATION ELECTRON SPECTROSCOPY

    K. Ohno;H. Mutoh;Y. Harada

  • State‐resolved collision energy dependence of Penning ionization cross sections for N2 and CO2 by He*23S

    Koichi Ohno;Tomohide Takami;Koichiro Mitsuke;Toshimasa Ishida

  • Updated Branching Plane for Finding Conical Intersections without Coupling Derivative Vectors.

    Satoshi Maeda;Koichi Ohno;Keiji Morokuma

  • Raman spectra of polycyclic aromatic hydrocarbons. Comparison of calculated Raman intensity distributions with observed spectra for naphthalene, anthracene, pyrene, and perylene

    Hideaki Shinohara;Yoshihiro Yamakita;Koichi Ohno

  • Kinetic energy dependence of partial cross sections for the collisional ionization of H2O, H2S, O2, and Ar with He(2 3S) metastable atoms

    Koichiro Mitsuke;Tomohide Takami;Koichi Ohno

  • Computational Study of Titanocene-Catalyzed Dehydrocoupling of the Adduct Me2NH·BH3: An Intramolecular, Stepwise Mechanism

    Yi Luo and;Koichi Ohno

  • Structures of water octamers (H2O)8: exploration on ab initio potential energy surfaces by the scaled hypersphere search method.

    Satoshi Maeda;Koichi Ohno

  • Jahn-Teller Distortion in Dangling-Bond Linear Chains Fabricated on a Hydrogen-Terminated Si(100)- 2×1 Surface

    Taro Hitosugi;S. Heike;T. Onogi;T. Hashizume

  • Collision‐energy/electron‐energy resolved two‐dimensional study of Penning ionization of Ar by He metastable atoms 23S and 21S

    Koichi Ohno;Hideo Yamakado;Tetsuji Ogawa;Toshiaki Yamata

  • From Roaming Atoms to Hopping Surfaces: Mapping Out Global Reaction Routes in Photochemistry

    Satoshi Maeda;Tetsuya Taketsugu;Koichi Ohno;Keiji Morokuma

  • Selective Observation of Outermost Surface Layer during Epitaxial Growth by Penning-Ionization Electron Spectroscopy: Pentacene on Graphite

    Y. Harada;H. Ozaki;K. Ohno

  • Penning ionization of (CH3)4C and (CH3)3CCl by collision with He*(2 3S) metastable atoms

    Tomohide Takami;Koichiro Mitsuke;Koichi Ohno

  • Exterior electron model for Penning ionization. Unsaturated hydrocarbons

    Koichi Ohno;Setsuo Matsumoto;Yoshiya Harada

  • Collision energy‐resolved Penning ionization electron spectra of unsaturated hydrocarbons with He*(2 3S) metastable atoms

    Tomohide Takami;Koichi Ohno

  • Automated global mapping of minimal energy points on seams of crossing by the anharmonic downward distortion following method: a case study of H2CO.

    Satoshi Maeda;Koichi Ohno;Keiji Morokuma

Frequent Co-Authors

Satoshi Maeda
Satoshi Maeda Hokkaido University
Hajime Tsujimoto
Hajime Tsujimoto University of Tokyo
Takeaki Iwamoto
Takeaki Iwamoto Tohoku University
Takashi Kajiwara
Takashi Kajiwara Nara Women's University
Keiji Morokuma
Keiji Morokuma Kyoto University
Hiroo Inokuchi
Hiroo Inokuchi University of Tokyo
Yozo Fujino
Yozo Fujino Yokohama National University
Hisashi Inokuma
Hisashi Inokuma University of Tokyo
Kazuhiko Seki
Kazuhiko Seki National Institute of Advanced Industrial Science and Technology
Yoshiyuki Kawazoe
Yoshiyuki Kawazoe Tohoku University

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