World's Best Scientists 2026 revealed!
Koji Hirano

Koji Hirano

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Chemistry
Japan
2026

D-Index & Metrics

Chemistry

D-Index
94
Citations
23926
World Ranking
1740
National Ranking
91

Koji Hirano 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 Hirano 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: 309 publications — 65th percentile

65% of scientists in this discipline score the same or lower.

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

Koji Hirano 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 Hirano 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: 94 D-Index — 91st percentile

91% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2026 - Research.com Chemistry in Japan Leader Award
  • 2025 - Research.com Chemistry in Japan Leader Award
  • 2022 - Research.com Chemistry in Japan Leader Award

Overview

Koji Hirano is affiliated with Osaka University in Japan and has contributed extensively to the fields of chemistry and materials science, with a focus on organic chemistry and materials chemistry. Their research output includes 151 publications in chemistry and 71 in materials science, reflecting a strong interdisciplinary approach.

The scientist's main subfields of study include organic chemistry, materials chemistry, inorganic chemistry, pharmaceutical science, and physical and theoretical chemistry. Their work spans several specific topics such as crystallization and solubility studies, catalytic C-H functionalization methods, X-ray diffraction in crystallography, catalytic cross-coupling reactions, sulfur-based synthesis techniques, organoboron and organosilicon chemistry, and the role of fluorine in organic chemistry.

Koji Hirano has published research in various academic venues, with the most frequent publication outlets being:

  • The Cambridge Structural Database
  • Organic Letters
  • Chemical Science
  • Chemistry Letters
  • Bulletin of the Chemical Society of Japan

Frequent coauthors include Masahiro Miura, Yuji Nishii, Kazutoshi Nishimura, Shibo Xu, and Yuki Kojima, indicating active collaborations within the chemistry research community.

Recent notable papers authored or co-authored by Hirano include:

  • Hydroamination, Aminoboration, and Carboamination with Electrophilic Amination Reagents: Umpolung-Enabled Regio- and Stereoselective Synthesis of N-Containing Molecules from Alkenes and Alkynes (2022), Journal of the American Chemical Society
  • Cu-Catalyzed Reductive gem-Difunctionalization of Terminal Alkynes via Hydrosilylation/Hydroamination Cascade: Concise Synthesis of α-Aminosilanes (2020), Chemistry - A European Journal
  • Direct Synthesis of Dibenzophospholes from Biaryls by Double C-P Bond Formation via Phosphenium Dication Equivalents (2020), Organic Letters

The scope of topics covered in these publications highlights an emphasis on methods for regio- and stereoselective synthesis and catalytic processes involving functional group transformations in organic molecules.

Best Publications

  • A New Entry of Amination Reagents for Heteroaromatic C−H Bonds: Copper-Catalyzed Direct Amination of Azoles with Chloroamines at Room Temperature

    Tsuyoshi Kawano;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Rhodium-catalyzed oxidative coupling of aromatic imines with internal alkynes via regioselective C–H bond cleavage

    Tatsuya Fukutani;Nobuyoshi Umeda;Koji Hirano;Tetsuya Satoh

  • Copper-Catalyzed Intermolecular Regioselective Hydroamination of Styrenes with Polymethylhydrosiloxane and Hydroxylamines†

    Yuya Miki;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Ruthenium-Catalyzed Oxidative Vinylation of Heteroarene Carboxylic Acids with Alkenes via Regioselective C−H Bond Cleavage

    Takumi Ueyama;Satoshi Mochida;Tatsuya Fukutani;Koji Hirano

  • Rhodium-catalyzed Oxidative Coupling/Cyclization of Benzamides with Alkynes via C-H Bond Cleavage

    Satoshi Mochida;Nobuyoshi Umeda;Koji Hirano;Tetsuya Satoh

  • Rhodium-catalyzed oxidative coupling/cyclization of 2-phenylindoles with alkynes via C-H and N-H bond cleavages with air as the oxidant.

    Keisuke Morimoto;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Nickel-Catalyzed Direct C ? H Arylation and Alkenylation of Heteroarenes with Organosilicon Reagents

    Hitoshi Hachiya;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Copper‐Mediated CH/CH Biaryl Coupling of Benzoic Acid Derivatives and 1,3‐Azoles

    Mayuko Nishino;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Rhodium-Catalyzed Mono- and Divinylation of 1-Phenylpyrazoles and Related Compounds via Regioselective C−H Bond Cleavage

    Nobuyoshi Umeda;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Copper-Mediated Intermolecular Direct Biaryl Coupling

    Masanori Kitahara;Nobuyoshi Umeda;Koji Hirano;Tetsuya Satoh

  • Copper‐Mediated and Copper‐Catalyzed Cross‐Coupling of Indoles and 1,3‐Azoles: Double CH Activation

    Mayuko Nishino;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Rhodium-catalyzed regioselective olefination directed by a carboxylic group.

    Satoshi Mochida;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Nickel‐ and Cobalt‐Catalyzed Direct Alkylation of Azoles with N‐Tosylhydrazones Bearing Unactivated Alkyl Groups

    Tomoyuki Yao;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Synthesis of Functionalized α-Pyrone and Butenolide Derivatives by Rhodium-Catalyzed Oxidative Coupling of Substituted Acrylic Acids with Alkynes and Alkenes

    Satoshi Mochida;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Regioselective and stereospecific copper-catalyzed aminoboration of styrenes with bis(pinacolato)diboron and O-benzoyl-N,N-dialkylhydroxylamines.

    Naoki Matsuda;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Rhodium-catalyzed oxidative 1:1, 1:2, and 1:4 coupling reactions of phenylazoles with internal alkynes through the regioselective cleavages of multiple C-H bonds.

    Nobuyoshi Umeda;Koji Hirano;Tetsuya Satoh;Naoto Shibata

  • Nickel-catalyzed carboxylation of organozinc reagents with CO2.

    Hidenori Ochiai;Minsul Jang;Koji Hirano;Hideki Yorimitsu

  • Nickel-Catalyzed Direct Arylation of Azoles with Aryl Bromides

    Hitoshi Hachiya;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Synthesis of stilbene and distyrylbenzene derivatives through rhodium-catalyzed ortho-olefination and decarboxylation of benzoic acids.

    Satoshi Mochida;Koji Hirano;Tetsuya Satoh;Masahiro Miura

  • Copper-catalyzed direct amination of electron-deficient arenes with hydroxylamines.

    Naoki Matsuda;Koji Hirano;Tetsuya Satoh;Masahiro Miura

Frequent Co-Authors

Masahiro Miura
Masahiro Miura Osaka University
Tetsuya Satoh
Tetsuya Satoh Osaka Metropolitan University
Hideki Yorimitsu
Hideki Yorimitsu Kyoto University
Koichiro Oshima
Koichiro Oshima Kyoto University
Carsten Bolm
Carsten Bolm RWTH Aachen University
Ken Tanaka
Ken Tanaka Tokyo Institute of Technology
Shu Seki
Shu Seki Kyoto University
Hayato Tsurugi
Hayato Tsurugi Osaka University
Fumitoshi Kakiuchi
Fumitoshi Kakiuchi Keio University
Hiroshi Shinokubo
Hiroshi Shinokubo Nagoya University

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