World's Best Scientists 2026 revealed!
Toshikazu Hirao

Toshikazu Hirao

D-Index & Metrics

Chemistry

D-Index
69
Citations
16957
World Ranking
6190
National Ranking
394

Toshikazu Hirao 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 Toshikazu Hirao 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: 457 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.

Toshikazu Hirao 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 Toshikazu Hirao 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: 69 D-Index — 66th percentile

66% of scientists in this discipline score the same or lower.

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

Overview

Toshikazu Hirao is affiliated with Osaka University in Japan. Their research spans multiple areas within chemistry and materials science, focusing on organic chemistry, polymers, and applied materials chemistry. The work covers various specialized subfields, including organic chemistry, polymers and plastics, electrical and electronic engineering, materials chemistry, and process chemistry and technology.

The primary research topics addressed in Hirao's publications include:

  • Conducting polymers and applications
  • Catalytic C-H functionalization methods
  • Carbon dioxide utilization in catalysis
  • CO2 reduction techniques and catalysts
  • Oxidative organic chemistry reactions
  • Alkaloids: synthesis and pharmacology
  • Synthesis and properties of aromatic compounds

Hirao has published in several scientific journals, with frequent appearances in:

  • RSC Advances
  • Chemical Communications
  • Organometallics
  • Bulletin of the Chemical Society of Japan
  • Japanese Journal of Applied Physics

Recent papers authored or coauthored by Hirao include:

  • "Oxovanadium(v)-catalyzed oxidative cross-coupling of enolates using O2 as a terminal oxidant," 2020, Chemical Communications
  • "Structural Consequences of Two-Fold Deprotonation of Sumanene: Embedding Two Cp-rings into a Nonplanar Carbon Framework," 2021, Organometallics
  • "Oxovanadium(v)-catalyzed amination of carbon dioxide under ambient pressure for the synthesis of ureas," 2021, RSC Advances
  • "Synthesis of Self-Doped Conductive Poly(3,4-ethylenedioxythiophene) (PEDOT) Bearing Phosphonic Acid Moieties," 2022, Bulletin of the Chemical Society of Japan
  • "Self-doped conducting polyaniline bearing phosphonic acid as a hole transport layer in organic photovoltaics," 2024, Japanese Journal of Applied Physics

Collaboration forms a notable part of Hirao's research activity. Frequent coauthors include:

  • Toru Amaya
  • Mamoru Tobisu
  • Masato Daijo
  • Kahori Kiriyama
  • Yuhi Inada

Best Publications

  • Synthesis of .alpha.,.beta.-unsaturated carbonyl compounds by palladium(II)-catalyzed dehydrosilylation of silyl enol ethers

    Unknown

  • A Synthesis of Sumanene, a Fullerene Fragment

    Hidehiro Sakurai;Taro Daiko;Toshikazu Hirao

  • PALLADIUM-CATALYZED NEW CARBON-PHOSPHORUS BOND FORMATION

    T. Hirao;T. Masunaga;N. Yamada;Y. Ohshiro

  • Vanadium in Modern Organic Synthesis

    Toshikazu Hirao

  • A NOVEL SYNTHESIS OF DIALKYL ARENEPHOSPHONATES

    Toshikazu Hirao;Toshio Masunaga;Yoshiki Ohshiro;Toshio Agawa

  • HIGHLY REGIO- AND STEREOCONTROLLED SYNTHESIS OF VINYL SULFIDES VIA TRANSITION-METAL-CATALYZED HYDROTHIOLATION OF ALKYNES WITH THIOLS

    Akiya Ogawa;Takuma Ikeda;Kouichi Kimura;Toshikazu Hirao

  • Structural elucidation of sumanene and generation of its benzylic anions.

    Hidehiro Sakurai;Taro Daiko;Hiroyuki Sakane;Toru Amaya

  • Stereoselective synthesis of vinylphosphonate

    Toshikazu Hirao;Toshio Masunaga;Yoshiki Ohshiro;Toshio Agawa

  • Pd/C as a reusable catalyst for the coupling reaction of halophenols and arylboronic acids in aqueous media.

    Hidehiro Sakurai;Tatsuya Tsukuda;Toshikazu Hirao

  • Chirality Organization of Ferrocenes Bearing Podand Dipeptide Chains: Synthesis and Structural Characterization

    Toshiyuki Moriuchi;Akihiro Nomoto;Kazuhiro Yoshida;and Akiya Ogawa

  • Anisotropic Electron Transport Properties in Sumanene Crystal

    Toru Amaya;Shu Seki;Toshiyuki Moriuchi;Kana Nakamoto

  • A molecular bowl sumanene

    Toru Amaya;Toshikazu Hirao

  • Design of Ferrocene-Dipeptide Bioorganometallic Conjugates To Induce Chirality-Organized Structures

    Toshiyuki Moriuchi;Toshikazu Hirao

  • Highly ordered structures of peptides by using molecular scaffolds.

    Toshiyuki Moriuchi;Toshikazu Hirao

  • Conjugated systems composed of transition metals and redox-active π-conjugated ligands

    Toshikazu Hirao

  • Surface-active properties of novel cationic surfactants with two alkyl chains and two ammonio groups

    Tae-Seong Kim;Toshiyuki Kida;Yohji Nakatsuji;Toshikazu Hirao

  • A highly ordered ferrocene system regulated by podand peptide chains

    Akihiro Nomoto;Toshiyuki Moriuchi;Shuhei Yamazaki;Akiya Ogawa

  • Redox Behavior of Polyaniline−Transition Metal Complexes in Solution

    Masayoshi Higuchi;Daisuke Imoda;Toshikazu Hirao

  • Interesting and effective P,N-chelation of tetrasubstituted ferrocene ligands for palladium-catalyzed asymmetric allylic substitution

    Wanbin Zhang;Toshikazu Hirao;Isao Ikeda

  • Highly diastereoselective ortho-lithiation of 1,1′-bis-(oxazolinyl)ferrocene directed to C2-symmetric chiral ligands

    Wanbin Zhang;Yoichi Adachi;Toshikazu Hirao;Isao Ikeda

  • A Novel Synthetic Metal Catalytic System

    Masayoshi Higuchi;Isao Ikeda;Toshikazu Hirao

  • Cyclization reactions via oxo-.pi.-allylpalladium(II) intermediates

    Yoshihiko Ito;Hirokazu Aoyama;Toshikazu Hirao;Akira Mochizuki

  • Bowl-to-bowl inversion of sumanene derivatives

    Toru Amaya;Hiroyuki Sakane;Toshiko Muneishi;Toshikazu Hirao

Frequent Co-Authors

Isao Ikeda
Isao Ikeda Osaka University
Ken-ichiro Hayashi
Ken-ichiro Hayashi Okayama University of Science
Hideo Kurosawa
Hideo Kurosawa Osaka University
Yoshihiko Ito
Yoshihiko Ito Kyoto University
Takeo Saegusa
Takeo Saegusa Kyoto University
Mamoru Tobisu
Mamoru Tobisu Osaka University
Akinori Saeki
Akinori Saeki Osaka University
Shu Seki
Shu Seki Kyoto University
Kentaro Yamaguchi
Kentaro Yamaguchi Tokushima Bunri University
Yoshinori Takashima
Yoshinori Takashima Osaka University

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

Pursuing a Chemistry degree in the USA opens doors to diverse career paths that blend science with practical applications. For example, individuals interested in the intersection of science and sales can explore the pharmaceutical industry. Understanding the pharmaceutical sales salary and career paths helps students assess the financial and professional benefits of this route.

For those drawn to patient care and medication management, it’s important to consider the time commitment required. The link explaining how long does it take to become a pharmacist offers valuable insight into the educational timeline and licensing requirements for this respected profession.

Alternatively, chemistry graduates fascinated by forensic science may pursue roles such as a forensic autopsy technician. This specialized job contributes to criminal investigations and requires specific training, as detailed in the article on forensic autopsy technician roles, education, and outlook.

Finally, for students seeking affordable education options, finding the cheapest online forensic science degree programs can be an excellent way to enter the field without excessive financial burden. These programs provide a flexible and cost-effective path to specialized knowledge.

Best Scientists Citing Toshikazu Hirao

Trending Scientists