World's Best Scientists 2026 revealed!
Yoshimichi Ohki

Yoshimichi Ohki

D-Index & Metrics

Materials Science

D-Index
64
Citations
17880
World Ranking
5806
National Ranking
280

Yoshimichi Ohki 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 Yoshimichi Ohki 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: 777 publications — 97th percentile

97% of scientists in this discipline score the same or lower.

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

Yoshimichi Ohki 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 Yoshimichi Ohki 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: 64 D-Index — 55th percentile

55% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2000 - IEEE Fellow For contributions to understanding of high-field and laser induced dielectric phenomena in insulating materials.

Overview

Yoshimichi Ohki is affiliated with Waseda University in Japan and specializes in high voltage insulation and dielectric phenomena. Their research spans engineering and materials science, with significant contributions in subfields such as materials chemistry, electrical and electronic engineering, biomedical engineering, polymers and plastics, and civil and structural engineering.

Their recent publications include:

  • Broadband Complex Permittivity and Electric Modulus Spectra for Dielectric Materials Research, 2022, IEEJ Transactions on Electrical and Electronic Engineering
  • Surface flashover in 50 years: Theoretical models and competing mechanisms, 2023, High Voltage
  • Changes in mechanical and dielectric properties of silicone rubber induced by severe aging, 2020, IEEE Transactions on Dielectrics and Electrical Insulation
  • Effects of Heat and Gamma-rays on Mechanical and Dielectric Properties of Cross-linked Polyethylene, 2020, IEEE Transactions on Dielectrics and Electrical Insulation
  • Effects of gamma irradiation on the degradation of silicone rubber by steam exposure, 2020, Journal of Nuclear Science and Technology

The main research topics covered by Yoshimichi Ohki include:

  • High voltage insulation and dielectric phenomena
  • Electrical Fault Detection and Protection
  • Dielectric materials and actuators
  • Polymer Nanocomposites and Properties
  • Advanced Sensor and Energy Harvesting Materials
  • Power Transformer Diagnostics and Insulation
  • Polymer Nanocomposite Synthesis and Irradiation

The scientist frequently collaborates with other researchers, including:

  • Naoshi Hirai
  • J.J. Shea
  • F. Hegeler
  • P.H.F. Morshuis
  • Hiroyuki Ishii

Yoshimichi Ohki publishes predominantly in specialized venues such as:

  • IEEE Electrical Insulation Magazine
  • IEEJ Transactions on Electrical and Electronic Engineering
  • IEEJ Transactions on Fundamentals and Materials
  • IEEE Transactions on Dielectrics and Electrical Insulation
  • High Voltage

Their work in dielectric phenomena has been recognized by their election as an IEEE Fellow in 2000 for contributions to understanding high-field and laser-induced dielectric phenomena in insulating materials.

Best Publications

  • A plasmonic photocatalyst consisting of silver nanoparticles embedded in titanium dioxide.

    Koichi Awazu;Makoto Fujimaki;Carsten Rockstuhl;Junji Tominaga

  • Proposal of a multi-core model for polymer nanocomposite dielectrics

    T. Tanaka;M. Kozako;N. Fuse;Y. Ohki

  • Photoluminescence from defect centers in high-purity silica glasses observed under 7.9-eV excitation

    Hiroyuki Nishikawa;Taiji Shiroyama;Ryuta Nakamura;Yoshimichi Ohki

  • Role of interface on the thermal conductivity of highly filled dielectric epoxy/AlN composites

    Xingyi Huang;Tomonori Iizuka;Pingkai Jiang;Yoshimichi Ohki

  • Correlation of the 5.0- and 7.6-eV absorption bands in SiO2 with oxygen vacancy

    Ryoichi Tohmon;Hiroyasu Mizuno;Yoshimichi Ohki;Kotoku Sasagane

  • 2.7-eV luminescence in as-manufactured high-purity silica glass.

    Ryoichi Tohmon;Yasushi Shimogaichi;Hiroyasu Mizuno;Yoshimichi Ohki

  • Various types of nonbridging oxygen hole center in high-purity silica glass

    Shuji Munekuni;Toshihisa Yamanaka;Yasushi Shimogaichi;Ryoichi Tohmon

  • Surface degradation of polyamide nanocomposites caused by partial discharges using IEC (b) electrodes

    M. Kozako;N. Fuse;Y. Ohki;T. Okamoto

  • Electric modulus powerful tool for analyzing dielectric behavior

    Fuqiang Tian;Yoshimichi Ohki

  • Enhanced partial discharge resistance of epoxy/clay nanocomposite prepared by newly developed organic modification and solubilization methods

    T. Tanaka;Y. Ohki;M. Ochi;M. Harada

  • Effects of nano-filler addition on partial discharge resistance and dielectric breakdown strength of Micro-Al 2 O 3 Epoxy composite

    Zhe Li;Kenji Okamoto;Yoshimichi Ohki;Toshikatsu Tanaka

  • Dielectric properties of water and water/ethylene glycol mixtures for use in pulsed power system design

    M. Zahn;Y. Ohki;D.B. Fenneman;R.J. Gripshover

  • Development of epoxy/BN composites with high thermal conductivity and sufficient dielectric breakdown strength partI - sample preparations and thermal conductivity

    Zengbin Wang;Tomonori Iizuka;Masahiro Kozako;Yoshimichi Ohki

  • Decay kinetics of the 4.4-eV photoluminescence associated with the two states of oxygen-deficient-type defect in amorphous SiO2.

    Hiroyuki Nishikawa;Eiki Watanabe;Daisuke Ito;Yoshimichi Ohki

  • Plasma-enhanced chemical vapor deposition and characterization of high-permittivity hafnium and zirconium silicate films

    Hiromitsu Kato;Tomohiro Nango;Takeshi Miyagawa;Takahiro Katagiri

  • Dielectric properties of XLPE/Sio2 nanocomposites based on CIGRE WG D1.24 cooperative test results

    T. Tanaka;A. Bulinski;J. Castellon;M. Frechette

  • Defects and optical absorption bands induced by surplus oxygen in high‐purity synthetic silica

    Hiroyuki Nishikawa;Ryoichi Tohmon;Yoshimichi Ohki;Kaya Nagasawa

  • Visible photoluminescence from Si clusters in γ‐irradiated amorphous SiO2

    Hiroyuki Nishikawa;Eiki Watanabe;Daisuke Ito;Yuryo Sakurai

  • Effects of crosslinking byproducts on space charge formation in crosslinked polyethylene

    Y. Maeno;N. Hirai;Y. Ohki;T. Tanaka

  • Development of epoxy/BN composites with high thermal conductivity and sufficient dielectric breakdown strength part II-breakdown strength

    Zengbin Wang;Tomonori Iizuka;Masahiro Kozako;Yoshimichi Ohki

  • Generation mechanism of photoinduced paramagnetic centers from preexisting precursors in high-purity silicas.

    Hiroyuki Nishikawa;Ryuta Nakamura;Ryoichi Tohmon;Yoshimichi Ohki

Frequent Co-Authors

Toshikatsu Tanaka
Toshikatsu Tanaka Waseda University
Shigemitsu Okabe
Shigemitsu Okabe TEPCO (Japan)
Junji Tominaga
Junji Tominaga National Institute of Advanced Industrial Science and Technology
Shengtao Li
Shengtao Li Xi'an Jiaotong University
Carsten Rockstuhl
Carsten Rockstuhl Karlsruhe Institute of Technology
Makoto Makishima
Makoto Makishima Nihon University
Hiroshi Kawazoe
Hiroshi Kawazoe Tokyo Institute of Technology
Xingyi Huang
Xingyi Huang Shanghai Jiao Tong University
Pingkai Jiang
Pingkai Jiang Shanghai Jiao Tong University

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