World's Best Scientists 2026 revealed!

D-Index & Metrics

Materials Science

D-Index
68
Citations
14605
World Ranking
4935
National Ranking
236

Kiyoshi Okada publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Kiyoshi Okada sits on this spectrum.

50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50 publications 1,163+

This scientist: 493 publications — 86th percentile

86% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

Kiyoshi Okada D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Kiyoshi Okada sits on this spectrum.

40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40 D-Index 165+

This scientist: 68 D-Index — 63rd percentile

63% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

Overview

Kiyoshi Okada is affiliated with the Tokyo Institute of Technology in Japan. Their primary field of study is Medicine, with a focus on several subfields including Molecular Biology, Physiology, Public Health, Environmental and Occupational Health, Renewable Energy, Sustainability and the Environment, and Mechanics of Materials.

Okada's research covers a range of main topics, notably:

  • Biomedical Ethics and Regulation
  • Pluripotent Stem Cells Research
  • Health Systems, Economic Evaluations, Quality of Life
  • Ethics in Clinical Research
  • Malaria Research and Control
  • Vaccines and Immunoinformatics Approaches
  • Complement System in Diseases

Their recent publications demonstrate an interdisciplinary approach intersecting medicine, ethics, and regenerative therapies. Selected recent papers include:

  • "Regulatory and Ethical Aspects of Orthobiologic Therapies," 2022, Orthopaedic Journal of Sports Medicine
  • "First-in-human randomised trial and follow-up study of Plasmodium falciparum blood-stage malaria vaccine BK-SE36 with CpG-ODN(K3)," 2020, Vaccine
  • "Study protocol for periodontal tissue regeneration with a mixture of autologous adipose-derived stem cells and platelet rich plasma: A multicenter, randomized, open-label clinical trial," 2022, Regenerative Therapy
  • "Pilot study for the treatment of cutaneous neurofibromas in neurofibromatosis type 1 patients using topical sirolimus gel," 2022, Journal of the American Academy of Dermatology
  • "Identification of unapproved orthopedic regenerative medicine: Usefulness of the Act on Safety of Regenerative Medicine," 2024, Stem Cell Reports

Frequently publishing in venues such as Regenerative Therapy and the Journal of the American Academy of Dermatology, Okada integrates clinical and translational research perspectives.

Collaborations have involved coauthors including Kouji Yamamoto, Akira Myoui, Morikuni Tobita, Masahiro Kino-oka, and Mari Wataya-Kaneda, with multiple joint publications reflecting ongoing research partnerships.

Best Publications

  • Characterization of the Spinel Phase from SiO2-Al2O3 Xerogels and the Formation Process of Mullite

    Kiyoshi Okada;Nozomu Ōtsuka

  • Effect of Silica Additive on the Anatase-to-Rutile Phase Transition

    Kiyoshi Okada;Nobuo Yamamoto;Yoshikazu Kameshima;Atsuo Yasumori

  • Preparation of graphitic carbon nitride (g-C3N4)/WO3 composites and enhanced visible-light-driven photodegradation of acetaldehyde gas

    Ken-ichi Katsumata;Ryosuke Motoyoshi;Nobuhiro Matsushita;Kiyoshi Okada

  • Adsorption properties of activated carbon from waste newspaper prepared by chemical and physical activation.

    Kiyoshi Okada;Nobuo Yamamoto;Yoshikazu Kameshima;Atsuo Yasumori

  • Formation of hydroxyapatite on CaSiO3 powders in simulated body fluid

    Punnama Siriphannon;Yoshikazu Kameshima;Atsuo Yasumori;Kiyoshi Okada

  • Mn–Ce/ZSM5 as a new superior catalyst for NO reduction with NH3

    Gabriela Carja;Yoshikazu Kameshima;Kiyoshi Okada;Changalla D. Madhusoodana

  • Crystallinity of boehmite and its effect on the phase transition temperature of alumina

    Takayuki Tsukada;Hideo Segawa;Atsuo Yasumori;Kiyoshi Okada

  • Synthesis of Mullite Whiskers and Their Application in Composites

    Kiyoshi Okada;Nozomu Ōtuska

  • Structure Refinement of Mullite by the Rietveld Method and a New Method for Estimation of Chemical Composition

    Takayuki Ban;Kiyoshi Okada

  • Gas permeability and mechanical properties of porous alumina ceramics with unidirectionally aligned pores

    Toshihiro Isobe;Yoshikazu Kameshima;Akira Nakajima;Kiyoshi Okada

  • Preparation of microporous silica from metakaolinite by selective leaching method

    Kiyoshi Okada;Akira Shimai;Takahiro Takei;Shigeo Hayashi

  • Relationship between formation conditions, properties, and crystallite size of boehmite.

    Kiyoshi Okada;Toru Nagashima;Yoshikazu Kameshima;Atsuo Yasumori

  • PREPARATION AND SINTERING OF CASIO3 FROM COPRECIPITATED POWDER USING NAOH AS PRECIPITANT AND ITS APATITE FORMATION IN SIMULATED BODY FLUID SOLUTION

    Punnama Siriphannon;Shigeo Hayashi;Atsuo Yasumori;Kiyoshi Okada

  • Thermal decomposition of mechanically activated gibbsite

    K.J.D. MacKenzie;J. Temuujin;K. Okada

  • Preparation of porous silica from vermiculite by selective leaching

    Jadambaa Temuujin;Kiyoshi Okada;Kenneth J.D MacKenzie

  • Water retention properties of porous geopolymers for use in cooling applications

    Kiyoshi Okada;Asami Ooyama;Toshihiro Isobe;Yoshikazu Kameshima

  • Co3O4 nanoparticles-loaded BiOCl nanoplates with the dominant {001} facets: efficient photodegradation of organic dyes under visible light

    Congwei Tan;Gangqiang Zhu;Mirabbos Hojamberdiev;Kiyoshi Okada

  • Characterization of Spinel Phase Formed in the Kaolin‐Mullite Thermal Sequence

    Kiyoshi Okada;Nozomu ŌTsuka;Joyo Ossaka

  • ZnO-graphene composites as practical photocatalysts for gaseous acetaldehyde degradation and electrolytic water oxidation

    Yu Chih Chen;Ken Ichi Katsumata;Yi Hsuan Chiu;Kiyoshi Okada

  • Chemical Shifts of Silicon X‐ray Photoelectron Spectra by Polymerization Structures of Silicates

    Kiyoshi Okada;Yoshikazu Kameshima;Atsuo Yasumori

  • Influence of preparation conditions on the microstructure and bioactivity of α-CaSiO3 ceramics : Formation of hydroxyapatite in simulated body fluid

    Punnama Siriphannon;Yoshikazu Kameshima;Atsuo Yasumori;Kiyoshi Okada

Frequent Co-Authors

Yoshikazu Kameshima
Yoshikazu Kameshima Okayama University
Akira Nakajima
Akira Nakajima Tokyo Institute of Technology
Mirabbos Hojamberdiev
Mirabbos Hojamberdiev Technical University of Berlin
Toshiya Watanabe
Toshiya Watanabe University of Tokyo
Gangqiang Zhu
Gangqiang Zhu Shaanxi Normal University
Kazuya Nakata
Kazuya Nakata Tokyo University of Agriculture and Technology
Mitsuo Niinomi
Mitsuo Niinomi Tohoku University
Akihisa Inoue
Akihisa Inoue Josai International University
Naoki Ohashi
Naoki Ohashi National Institute for Materials Science
Zainal Arifin Ahmad
Zainal Arifin Ahmad Universiti Sains Malaysia

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