World's Best Scientists 2026 revealed!
Hiromi Nakai

Hiromi Nakai

D-Index & Metrics

Chemistry

D-Index
54
Citations
11018
World Ranking
12561
National Ranking
947

Hiromi Nakai 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 Hiromi Nakai 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: 370 publications — 76th percentile

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

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

Hiromi Nakai 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 Hiromi Nakai 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: 54 D-Index — 31st percentile

31% of scientists in this discipline score the same or lower.

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

Overview

Hiromi Nakai is affiliated with Waseda University in Japan and has contributed extensively to the fields of chemistry, physics and astronomy, and materials science. Their research spans multiple subfields including atomic and molecular physics and optics, materials chemistry, organic chemistry, electrical and electronic engineering, and physical and theoretical chemistry.

The scientist's publications focus on advanced chemical physics studies, spectroscopy and quantum chemical studies, photochemistry and electron transfer, X-ray diffraction in crystallography, machine learning in materials science, organoboron and organosilicon chemistry, and catalysis and oxidation reactions.

Frequent publication venues for Hiromi Nakai include:

  • The Journal of Chemical Physics
  • Journal of Computer Chemistry Japan
  • The Cambridge Structural Database
  • Chemical Physics Letters
  • Journal of Chemical Theory and Computation

Collaborations have been conducted with several researchers including Yasuhiro Ikabata, Yoshifumi Nishimura, Yoshiaki Shoji, Takanori Fukushima, and Aditya Wibawa Sakti.

Notable recent papers authored or coauthored by Hiromi Nakai are:

  • "Confined water-mediated high proton conduction in hydrophobic channel of a synthetic nanotube", 2020, Nature Communications
  • "Orbital-free density functional theory calculation applying semi-local machine-learned kinetic energy density functional and kinetic potential", 2020, Chemical Physics Letters
  • "Collaborative virtual screening to elaborate an imidazo[1,2-a]pyridine hit series for visceral leishmaniasis", 2021, RSC Medicinal Chemistry
  • "Agglomeration Suppression of a Fe-Supported Catalyst and its Utilization for Low-Temperature Ammonia Synthesis in an Electric Field", 2020, ACS Omega
  • "An Air- and Water-Stable B4N4-Heteropentalene Serving as a Host Material for a Phosphorescent OLED", 2021, Angewandte Chemie International Edition

Best Publications

  • Theoretical Analysis of Interactions between Potassium Ions and Organic Electrolyte Solvents: A Comparison with Lithium, Sodium, and Magnesium Ions

    Masaki Okoshi;Masaki Okoshi;Yuki Yamada;Yuki Yamada;Shinichi Komaba;Shinichi Komaba;Atsuo Yamada;Atsuo Yamada

  • Theoretical Analysis on De-Solvation of Lithium, Sodium, and Magnesium Cations to Organic Electrolyte Solvents

    Masaki Okoshi;Yuki Yamada;Yuki Yamada;Atsuo Yamada;Atsuo Yamada;Hiromi Nakai

  • Unveiling a New Aspect of Simple Arylboronic Esters: Long-Lived Room-Temperature Phosphorescence from Heavy-Atom-Free Molecules.

    Yoshiaki Shoji;Yasuhiro Ikabata;Qi Wang;Daisuke Nemoto

  • Density functional method including weak interactions: Dispersion coefficients based on the local response approximation.

    Takeshi Sato;Hiromi Nakai

  • An extension of ab initio molecular orbital theory to nuclear motion

    Masanori Tachikawa;Kazuhide Mori;Hiromi Nakai;Kaoru Iguchi

  • Alternative linear-scaling methodology for the second-order Møller-Plesset perturbation calculation based on the divide-and-conquer method

    Masato Kobayashi;Yutaka Imamura;Hiromi Nakai

  • Confined water-mediated high proton conduction in hydrophobic channel of a synthetic nanotube

    Ken ichi Otake;Kazuya Otsubo;Tokutaro Komatsu;Tokutaro Komatsu;Shun Dekura;Shun Dekura

  • Simultaneous determination of nuclear and electronic wave functions without Born–Oppenheimer approximation: Ab initio NO+MO/HF theory

    Hiromi Nakai

  • Extension of linear-scaling divide-and-conquer-based correlation method to coupled cluster theory with singles and doubles excitations

    Masato Kobayashi;Hiromi Nakai

  • Energy density analysis with Kohn-Sham orbitals

    Hiromi Nakai

  • Implementation of divide-and-conquer method including Hartree-Fock exchange interaction.

    Tomoko Akama;Masato Kobayashi;Hiromi Nakai

  • Divide-and-conquer-based linear-scaling approach for traditional and renormalized coupled cluster methods with single, double, and noniterative triple excitations

    Masato Kobayashi;Hiromi Nakai

  • Nuclear orbital plus molecular orbital theory: Simultaneous determination of nuclear and electronic wave functions without Born–Oppenheimer approximation

    Hiromi Nakai

  • Electrocatalytic synthesis of ammonia by surface proton hopping

    R. Manabe;H. Nakatsubo;A. Gondo;K. Murakami

  • Time-dependent density functional theory calculations for core-excited states: assessment of standard exchange-correlation functionals and development of a novel hybrid functional.

    Ayako Nakata;Yutaka Imamura;Takao Otsuka;Hiromi Nakai

  • Three pillars for achieving quantum mechanical molecular dynamics simulations of huge systems: Divide-and-conquer, density-functional tight-binding, and massively parallel computation.

    Hiroaki Nishizawa;Yoshifumi Nishimura;Masato Kobayashi;Stephan Irle

  • Non-Fermi liquid behavior in the magnetotransport of CeMIn5 (M: Co and Rh): Striking similarity between quasi 2D heavy fermion and high-Tc cuprates

    Y. Nakajima;H. Shishido;H. Nakai;T. Shibauch

  • Many-body effects in nonadiabatic molecular theory for simultaneous determination of nuclear and electronic wave functions: Ab initio NOMO/MBPT and CC methods

    Hiromi Nakai;Keitaro Sodeyama

  • Local response dispersion method. II. Generalized multicenter interactions

    Takeshi Sato;Hiromi Nakai

  • Molecular orbital study on the reaction process of dimethylamine borane as a reductant for electroless deposition

    Takayuki Homma;Amiko Tamaki;Hiromi Nakai;Tetsuya Osaka

  • Hybrid exchange-correlation functional for core, valence, and Rydberg excitations: core-valence-Rydberg B3LYP.

    Ayako Nakata;Yutaka Imamura;Hiromi Nakai

  • Sodium‐ and Potassium‐Hydrate Melts Containing Asymmetric Imide Anions for High‐Voltage Aqueous Batteries

    Qifeng Zheng;Shota Miura;Kasumi Miyazaki;Seongjae Ko

Frequent Co-Authors

Hiroshi Nakatsuji
Hiroshi Nakatsuji Kyoto University
Masahiko Morinaga
Masahiko Morinaga Toyota Motor Corporation (Japan)
Yusuke Yamauchi
Yusuke Yamauchi University of Queensland
Atsuo Yamada
Atsuo Yamada University of Tokyo
Yuki Yamada
Yuki Yamada University of Tokyo
Tetsuya Osaka
Tetsuya Osaka Waseda University
Chihaya Adachi
Chihaya Adachi Kyushu University
Takanori Fukushima
Takanori Fukushima Tokyo Institute of Technology
Kin-ya Akiba
Kin-ya Akiba Hiroshima University
Feng Wang
Feng Wang Swinburne University of Technology

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