World's Best Scientists 2026 revealed!
Akihiro Yokoyama

Akihiro Yokoyama

D-Index & Metrics

Chemistry

D-Index
42
Citations
8467
World Ranking
17406
National Ranking
1373

Akihiro Yokoyama 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 Akihiro Yokoyama 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: 127 publications — 7th percentile

7% of scientists in this discipline score the same or lower.

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

Akihiro Yokoyama 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 Akihiro Yokoyama 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: 42 D-Index — 3rd percentile

3% of scientists in this discipline score the same or lower.

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

Overview

Akihiro Yokoyama is affiliated with Seikei University in Japan, contributing to research primarily in the field of Medicine with a focus on Organic Chemistry, Materials Chemistry, Molecular Biology, Hematology, and Epidemiology. Their scholarly output reflects an interdisciplinary approach combining chemical synthesis and medical studies.

The main topics addressed in Yokoyama's work include:

  • Multiple Myeloma Research and Treatments
  • Protein Degradation and Inhibitors
  • Peptidase Inhibition and Analysis
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Lymphoma Diagnosis and Treatment
  • Chemical Synthesis and Analysis

Yokoyama has published research in several well-known venues, with frequent publications appearing in:

  • Cureus
  • The Cambridge Structural Database
  • International Journal of Hematology
  • In Vivo
  • Journal of Anesthesia

Recent notable papers by Yokoyama include:

  • Synthesis of a coronene analogue containing an amide bond by Pd-mediated intramolecular C C bond formation of 2-halogenated 4-(alkylamino)benzoic acid cyclic trimer, 2020, Tetrahedron Letters
  • Primary analysis of a prospective cohort study of Japanese patients with plasma cell neoplasms in the novel drug era (2016-2021), 2024, International Journal of Hematology
  • Development of Helical Aromatic Amide Foldamers with a Diphenylacetylene Backbone, 2020, The Journal of Organic Chemistry
  • Five-year follow-up of a phase II study of DA-EPOCH-R with high-dose MTX in CD5-positive DLBCL, 2023, Cancer Science
  • High-dose dexamethasone therapy as the initial treatment for idiopathic thrombocytopenic purpura, 2020, International Journal of Hematology

Yokoyama frequently collaborates with researchers including Isao Azumaya, Kenta Rakumitsu, Tetsuya Hara, Shoko Kikkawa, and Hironori Ueno. These partnerships have been important in producing multidisciplinary studies spanning chemistry and hematology.

Best Publications

  • Chain-Growth Polymerization for Poly(3-hexylthiophene) with a Defined Molecular Weight and a Low Polydispersity

    Akihiro Yokoyama;T. Ryo Miyakoshi;Tsutomu Yokozawa

  • Catalyst-transfer polycondensation. mechanism of Ni-catalyzed chain-growth polymerization leading to well-defined poly(3-hexylthiophene).

    Ryo Miyakoshi;and Akihiro Yokoyama;Tsutomu Yokozawa

  • Chain-Growth Condensation Polymerization for the Synthesis of Well-Defined Condensation Polymers and π-Conjugated Polymers

    Tsutomu Yokozawa;Akihiro Yokoyama

  • Chain-Growth Polymerization for the Synthesis of Polyfluorene via Suzuki−Miyaura Coupling Reaction from an Externally Added Initiator Unit

    Akihiro Yokoyama;Hirofumi Suzuki;Yasuhiro Kubota;Kazuei Ohuchi

  • Structure of maitotoxin

    Michio Murata;Hideo Naoki;Takashi Iwashita;Shigeki Matsunaga

  • Catalyst-transfer polycondensation for the synthesis of poly(p-phenylene) with controlled molecular weight and low polydispersity.

    Ryo Miyakoshi;Kyohei Shimono;and Akihiro Yokoyama;Tsutomu Yokozawa

  • Synthesis of Poly(3‐hexylthiophene) with a Narrower Polydispersity

    Ryo Miyakoshi;Ryo Miyakoshi;Akihiro Yokoyama;Tsutomu Yokozawa;Tsutomu Yokozawa

  • Converting step-growth to chain-growth condensation polymerization

    Akihiro Yokoyama;Tsutomu Yokozawa

  • Precision Synthesis of Poly(N-hexylpyrrole) and Its Diblock Copolymer with Poly(p-phenylene) via Catalyst-Transfer Polycondensation

    Akihiro Yokoyama;Akira Kato;Ryo Miyakoshi;Tsutomu Yokozawa

  • Catalyst-Transfer Suzuki―Miyaura Coupling Polymerization for Precision Synthesis of Poly(p-phenylene)

    Tsutomu Yokozawa;Haruhiko Kohno;Yoshihiro Ohta;Akihiro Yokoyama

  • Some chemical properties of maitotoxin, a putative calcium channel agonist isolated from a marine dinoflagellate.

    Akihiro Yokoyama;Michio Murata;Yasukatsu Oshima;Takashi Iwashita

  • Precision synthesis of poly(3-hexylthiophene) from catalyst-transfer Suzuki-Miyaura coupling polymerization.

    Tsutomu Yokozawa;Ryosuke Suzuki;Masataka Nojima;Yoshihiro Ohta

  • Styloguanidines, new chitinase inhibitors from the marine sponge Stylotella aurantium

    Taketoshi Kato;Yoshikazu Shizuri;Hitoshi Izumida;Akihiro Yokoyama

  • Helical Structures of N-Alkylated Poly(p-benzamide)s

    Aya Tanatani;Akihiro Yokoyama;Isao Azumaya;Yoshinori Takakura

  • Prototype Pictet−Spengler Reactions Catalyzed by Superacids. Involvement of Dicationic Superelectrophiles

    Akihiro Yokoyama;Tomohiko Ohwada;Koichi Shudo

  • Chain-growth polycondensation: The living polymerization process in polycondensation

    Tsutomu Yokozawa;Akihiro Yokoyama

  • Importance of the Order of Successive Catalyst-transfer Condensation Polymerization in the Synthesis of Block Copolymers of Polythiophene and Poly(p-phenylene)

    Ryo Miyakoshi;Akihiro Yokoyama;Tsutomu Yokozawa

  • Catalyst-Transfer Condensation Polymerization for the Synthesis of Well-Defined Polythiophene with Hydrophilic Side Chain and of Diblock Copolythiophene with Hydrophilic and Hydrophobic Side Chains

    Tsutomu Yokozawa;Isao Adachi;Ryo Miyakoshi;Akihiro Yokoyama

  • Chain-growth polycondensation for well-defined aramide. Synthesis of unprecedented block copolymer containing aramide with low polydispersity.

    Tsutomu Yokozawa;Miyuki Ogawa;Atsushi Sekino;Ryuji Sugi

  • Production of Astaxanthin and 4-Ketozeaxanthin by the Marine Bacterium,<i>Agrobacterium aurantiacum</i>

    Unknown

  • Development of catalyst‐transfer condensation polymerization. Synthesis of π‐conjugated polymers with controlled molecular weight and low polydispersity

    Ryo Miyakoshi;Akihiro Yokoyama;Tsutomu Yokozawa

Frequent Co-Authors

Tsutomu Yokozawa
Tsutomu Yokozawa Kanagawa University
Norihiko Misawa
Norihiko Misawa Ishikawa Prefectural University
Masanobu Uchiyama
Masanobu Uchiyama University of Tokyo
Michio Murata
Michio Murata Osaka University
Chih-Feng Huang
Chih-Feng Huang National Chung Hsing University
Takeshi Yasumoto
Takeshi Yasumoto Tohoku University
Gerhard Sandmann
Gerhard Sandmann Goethe University Frankfurt
Hideo Naoki
Hideo Naoki Tohoku University
Jun Miyake
Jun Miyake Osaka University
Keisuke Kurita
Keisuke Kurita Seikei University

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