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Hisashi Okawa

Hisashi Okawa

Kyoto University
Japan

D-Index & Metrics

Chemistry

D-Index
62
Citations
16666
World Ranking
8713
National Ranking
597

Hisashi Okawa 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 Hisashi Okawa 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: 449 publications — 85th percentile

85% of scientists in this discipline score the same or lower.

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

Hisashi Okawa 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 Hisashi Okawa 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: 62 D-Index — 52nd percentile

52% of scientists in this discipline score the same or lower.

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

Overview

Hisashi Okawa is a researcher affiliated with Kyoto University in Japan. Their academic work predominantly addresses various aspects of chemistry and materials science, focusing in particular on inorganic chemistry, electronic, optical and magnetic materials, electrical and electronic engineering, and spectroscopy.

The scientist's recent publications demonstrate a strong engagement with the study of metal-organic frameworks and related materials. Notable papers include:

  • Remarkably enhanced proton conduction of {NBu2(CH2COOH)2}[MnCr(ox)3] by multiplication of carboxyl carrier in the cation, 2020, Chemical Communications
  • Superprotonic conduction of {NBu4-n(enOH)n}[MnCr(ox)3] (Bu = n-butyl; enOH = 2-hydroxyethyl; n = 1-3) in successive multiplication of hydroxyl proton-carrier in the cation, 2024, Bulletin of the Chemical Society of Japan

Key co-authors who have frequently collaborated with Okawa include:

  • Yukihiro Yoshida
  • Hiroshi Kitagawa
  • Kazuya Otsubo

Their work has appeared mainly in the following publication venues:

  • Chemical Communications
  • Bulletin of the Chemical Society of Japan

Their research contributes to several main topics, particularly in the areas of:

  • Metal-Organic Frameworks: Synthesis and Applications
  • Organic and Molecular Conductors Research
  • Fuel Cells and Related Materials
  • Advanced NMR Techniques and Applications

Within the broader fields of study, Okawa's output can be categorized as:

  • Chemistry
  • Materials Science

Subfields frequently addressed include:

  • Inorganic Chemistry
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Spectroscopy

Best Publications

  • Design of metal-complex magnets. Syntheses and magnetic properties of mixed-metal assemblies {NBu4[MCr(ox)3]}x (NBu4+ = tetra(n-butyl)ammonium ion; ox2- = oxalate ion; M = Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+)

    Hiroko Tamaki;Zhuang J. Zhong;Naohide Matsumoto;Sigeo Kida

  • Synthesis and magnetism of multi-dimensional cyanide-bridged bimetallic assemblies

    Masaaki Ohba;Hisashi Ōkawa

  • Complexes derived from the reaction of manganese(III) Schiff base complexes and hexacyanoferrate(III): Syntheses, multidimensional network structures, and magnetic properties

    Hitoshi Miyasaka;Naohide Matsumoto;Hisashi Okawa;Nazzareno Re

  • Heterodinuclear metal complexes of phenol-based compartmental macrocycles

    Hisashi Ōkawa;Hideki Furutachi;David E. Fenton

  • Oxalate-bridged bimetallic complexes {NH(prol)3}[MCr(ox)3] (M = Mn(II), Fe(II), Co(II); NH(prol)3(+) = tri(3-hydroxypropyl)ammonium) exhibiting coexistent ferromagnetism and proton conduction.

    Hisashi Okawa;Akihito Shigematsu;Masaaki Sadakiyo;Takuya Miyagawa

  • Promotion of Low-Humidity Proton Conduction by Controlling Hydrophilicity in Layered Metal–Organic Frameworks

    Masaaki Sadakiyo;Hisashi Okawa;Hisashi Okawa;Akihito Shigematsu;Masaaki Ohba

  • A Three-Dimensional Ferrimagnet with a High Magnetic Transition Temperature (TC) of 53 K Based on a Chiral Molecule

    Katsuya Inoue;Hiroyuki Imai;Prasanna S. Ghalsasi;Koichi Kikuchi

  • A New Bimetallic Ferromagnet, [Ni(en)2]3[Fe(CN)6]2.cntdot.2H2O, with a Rare Rope-Ladder Chain Structure

    Masaaki Ohba;Naomi Maruono;Hisashi Okawa;Toshiaki Enoki

  • Bimetallic Magnetic Material [Ni(diamine)2]2[Fe(CN)6]X with Two-Dimensional Network Extended by Fe(III)-CN-Ni(II) Linkages

    Masaaki Ohba;Hisashi Okawa;Nobuo Fukita;Yuzo Hashimoto

  • Structure and Magnetic Properties of a Chiral Two‐Dimensional Ferrimagnet with TC of 38 K

    Katsuya Inoue;Koichi Kikuchi;Masaaki Ohba;Hisashi Okawa

  • Binuclear Metal Complexes. III. Preparation and Properties of Mononuclear and Binuclear Copper(II) and Nickel(II) Complexes of New Macrocycles and Their Related Ligands

    Hisashi Okawa;Sigeo Kida

  • [Mn(en)]3[Cr(CN)6]2⋅4 H2O: A Three-Dimensional Dimetallic Ferrimagnet (Tc=69 K) with a Defective Cubane Unit

    Masaaki Ohba;Naoki Usuki;Nobuo Fukita;Hisashi Ōkawa

  • Heterodinuclear CuIIPbII and CuIIMII (M = Mn, Fe, Co, Ni, Cu, Zn) complexes of macrocycles with dissimilar 4- and 5-coordination sites : synthesis, structures, and properties

    Hisashi Okawa;Jun Nishio;Masaaki Ohba;Makoto Tadokoro

  • Proton-Conductive Magnetic Metal–Organic Frameworks, {NR3(CH2COOH)}[MaIIMbIII(ox)3]: Effect of Carboxyl Residue upon Proton Conduction

    Hisashi Okawa;Hisashi Okawa;Masaaki Sadakiyo;Teppei Yamada;Mitsuhiko Maesato

  • Series of Trinuclear NiIILnIIINiII Complexes Derived from 2,6-Di(acetoacetyl)pyridine: Synthesis, Structure, and Magnetism

    Takuya Shiga;Nobuhiro Ito;Akiko Hidaka;Hisashi Okawa

  • Stepwise synthesis and magnetic control of trimetallic magnets [Co2Ln(L)2(H2O)4][Cr(CN)6].nH2O (Ln = La, Gd; H2L = 2,6-Di(acetoacetyl)pyridine) with 3-D pillared-layer structure.

    Takuya Shiga;Hisashi Okawa;Susumu Kitagawa;Masaaki Ohba

  • Oxalate-bridged dinuclear Cr(III)-M(II) (M = Cu, Ni, Co, Fe, Mn) complexes: Synthesis, structure, and magnetism

    Masaaki Ohba;Hiroko Tamaki;Naohide Matsumoto;Hisashi Okawa

  • Structure and Magnetic Properties of One-Dimensional PPh4[Ni(pn)2][M(CN)6]·H2O (M = Fe, Cr, Co) Bimetallic Assemblies

    Masaaki Ohba;Naoki Usuki;Nobuo Fukita;Hisashi Ökawa

  • Dinuclear Nickel(II) Complexes of Phenol-Based "End-Off" Compartmental Ligands and Their Urea Adducts Relevant to the Urease Active Site

    Takeichiro Koga;Hideki Furutachi;Takako Nakamura;Nobuo Fukita

  • Ferrimagnetic Mixed-Metal Assemblies {NBu4[MFe(ox)3]}x

    Hisashi Okawa;Naohide Matsumoto;Hiroko Tamaki;Mas Aakiohba

  • cis-μ-1,2-Peroxo Diiron Complex: Structure and Reversible Oxygenation

    Unknown

Frequent Co-Authors

Sigeo Kida
Sigeo Kida Kyushu University
Masaaki Ohba
Masaaki Ohba Kyushu University
Naohide Matsumoto
Naohide Matsumoto Kumamoto University
David E. Fenton
David E. Fenton University of Sheffield
Yoshihiko Sadaoka
Yoshihiko Sadaoka Ehime University
Hitoshi Miyasaka
Hitoshi Miyasaka Tohoku University
Hiroki Oshio
Hiroki Oshio Dalian University of Technology
Harry Adams
Harry Adams University of Sheffield
Tsutomu Katsuki
Tsutomu Katsuki Kyushu University
Katsuya Inoue
Katsuya Inoue Hiroshima University

External Links

Personal website of Hisashi Okawa

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