World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
53
Citations
9684
World Ranking
13106
National Ranking
990

Koji Ohta 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 Koji Ohta 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: 226 publications — 42nd percentile

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

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

Koji Ohta 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 Koji Ohta 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: 53 D-Index — 28th percentile

28% of scientists in this discipline score the same or lower.

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

Overview

Koji Ohta is affiliated with the National Institute of Advanced Industrial Science and Technology in Japan. The research work of this scientist spans multiple disciplines, primarily focusing on engineering and medicine, with notable contributions in surgery, electrical and electronic engineering, biomedical engineering, and polymers and plastics.

The main research topics addressed by Ohta encompass spinal fractures and fixation techniques, hip and femur fractures, medical imaging and analysis, advancements in battery materials, semiconductor materials and devices, and transition metal oxide nanomaterials.

Ohta's recent publications include the following:

  • Evaluating the effect of early balloon kyphoplasty on adjacent vertebral fracture risk in osteoporotic vertebral fracture management: a retrospective study (2025, Asian Spine Journal)
  • Fabrication and Characterization of LiMn2O4 Thin Films for Flexible Thin Film Lithium-ion Batteries: Effect of thermal Annealing (2021, International Journal of Engineering and Applied Sciences (IJEAS))

The scientist has collaborated frequently with several co-authors, including:

  • Masatoshi Yamamoto
  • Daisuke Hirano
  • M Noguchi
  • Shuhei Ayukawa
  • Keigo Shirasaki

Ohta's work has been published in venues such as the Asian Spine Journal and the International Journal of Engineering and Applied Sciences (IJEAS), reflecting the interdisciplinary nature of their research combining clinical medical studies with engineering investigations.

Best Publications

  • Optically active poly(triphenylmethyl methacrylate) with one-handed helical conformation

    Yoshio Okamoto;Koichi Suzuki;Koji Ohta;Koichi Hatada

  • Spectroscopic studies of nile red in organic solvents and polymers

    Ashim Kumar Dutta;Kenji Kamada;Koji Ohta

  • Second Hyperpolarizability (γ) of Singlet Diradical System: Dependence of γ on the Diradical Character

    Masayoshi Nakano;Ryohei Kishi;Tomoshige Nitta;Takashi Kubo

  • Comparison Among Several Numerical Integration Methods for Kramers-Kronig Transformation

    Koji Ohta;Hatsuo Ishida

  • Strong two-photon absorption of singlet diradical hydrocarbons.

    Kenji Kamada;Koji Ohta;Takashi Kubo;Akihiro Shimizu

  • Relationship between third-order nonlinear optical properties and magnetic interactions in open-shell systems: a new paradigm for nonlinear optics.

    Masayoshi Nakano;Ryohei Kishi;Suguru Ohta;Hideaki Takahashi

  • Strong two-photon absorption of self-assembled butadiyne-linked bisporphyrin

    Kazuya Ogawa;Atsushi Ohashi;Yoshiaki Kobuke;Kenji Kamada

  • Two-photon absorption properties of symmetric substituted diacetylene: drastic enhancement of the cross section near the one-photon absorption peak

    Kenji Kamada;Koji Ohta;Yoichiro Iwase;Koichi Kondo

  • Singlet Diradical Character from Experiment

    Kenji Kamada;Koji Ohta;Akihiro Shimizu;Takashi Kubo

  • Matrix formalism for calculation of electric field intensity of light in stratified multilayered films

    Koji Ohta;Hatsuo Ishida

  • Second hyperpolarizabilities of polycyclic aromatic hydrocarbons involving phenalenyl radical units

    Masayoshi Nakano;Takashi Kubo;Kenji Kamada;Koji Ohta

  • A systematic femtosecond study on the two-photon absorbing D-π-A molecules–π-bridge nitrogen insertion and strength of the donor and acceptor groups

    Liudmil Antonov;Kenji Kamada;Koji Ohta;Fadhil S. Kamounah

  • Molecular Design for Organic Nonlinear Optics: Polarizability and Hyperpolarizabilities of Furan Homologues Investigated by Ab Initio Molecular Orbital Method†

    Kenji Kamada;Minoru Ueda;Hidemi Nagao;Keiko Tawa

  • Impact of diradical character on two-photon absorption: bis(acridine) dimers synthesized from an allenic precursor.

    Kenji Kamada;Shin-ichi Fuku-en;Shu Minamide;Shu Minamide;Koji Ohta

  • Two-photon-absorption-induced accumulated thermal effect on femtosecond Z-scan experiments studied with time-resolved thermal-lens spectrometry and its simulation

    Kenji Kamada;Kinu Matsunaga;Akihiro Yoshino;Koji Ohta

  • Synthesis and photophysical properties of new two-photon absorption chromophores containing a diacetylene moiety as the central π-bridge

    Yoichiro Iwase;Kenji Kamada;Koji Ohta;Koichi Kondo

  • Two-photon absorption properties of self-assemblies of butadiyne-linked bis(imidazolylporphyrin).

    Kazuya Ogawa;Atsushi Ohashi;Yoshiaki Kobuke;Kenji Kamada

  • Giant Enhancement of the Second Hyperpolarizabilities of Open-Shell Singlet Polyaromatic Diphenalenyl Diradicaloids by an External Electric Field and Donor–Acceptor Substitution

    Masayoshi Nakano;Takuya Minami;Kyohei Yoneda;Shabbir Muhammad

  • Erratum to: (Hyper)polarizability density analysis for open-shell molecular systems based on natural orbitals and occupation numbers

    Masayoshi Nakano;Hitoshi Fukui;Takuya Minami;Kyohei Yoneda

  • Second Hyperpolarizabilities (γ) of Bisimidazole and Bistriazole Benzenes: Diradical Character, Charged State, and Spin State Dependences

    Masayoshi Nakano;Ryohei Kishi;Nozomi Nakagawa;Suguru Ohta

  • (Hyper)polarizability density analysis for open-shell molecular systems based on natural orbitals and occupation numbers

    Unknown

Frequent Co-Authors

Kenji Kamada
Kenji Kamada National Institute of Advanced Industrial Science and Technology
Masayoshi Nakano
Masayoshi Nakano Osaka University
Takashi Kubo
Takashi Kubo Osaka University
Benoît Champagne
Benoît Champagne University of Namur
Kizashi Yamaguchi
Kizashi Yamaguchi Osaka University
Kazuhiro Nakasuji
Kazuhiro Nakasuji Osaka University
Yasushi Morita
Yasushi Morita Aichi Institute of Technology
Yoshio Okamoto
Yoshio Okamoto Nagoya University
Akihiro Shimizu
Akihiro Shimizu Osaka University
Yoshiaki Kobuke
Yoshiaki Kobuke Nara Institute of Science and Technology

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