World's Best Scientists 2026 revealed!
Kiyotaka Sakai

Kiyotaka Sakai

D-Index & Metrics

Chemistry

D-Index
53
Citations
11701
World Ranking
12968
National Ranking
976

Kiyotaka Sakai 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 Kiyotaka Sakai 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: 285 publications — 59th percentile

59% of scientists in this discipline score the same or lower.

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

Kiyotaka Sakai 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 Kiyotaka Sakai 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: 53 D-Index — 28th percentile

28% of scientists in this discipline score the same or lower.

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

Overview

Kiyotaka Sakai is affiliated with Waseda University in Japan. Their research primarily revolves around membrane technologies, with significant contributions in engineering and environmental science. The scientist's work spans various subfields including water science and technology, biomedical engineering, electrical and electronic engineering, mechanical engineering, and biomaterials.

The main research topics covered by Sakai include:

  • Membrane Separation Technologies
  • Membrane-based Ion Separation Techniques
  • Mechanical Circulatory Support Devices
  • Fuel Cells and Related Materials
  • Membrane Separation and Gas Transport
  • Electrospun Nanofibers in Biomedical Applications
  • Electrical and Bioimpedance Tomography

The scientist has a record of publishing in prominent venues such as:

  • Membranes (5 publications)
  • Journal of Artificial Organs (3 publications)
  • Preprints.org (1 publication)
  • Animal Bioscience (1 publication)
  • Renal Replacement Therapy (1 publication)

Notable recent papers by Sakai include:

  • "Electron Microscopic Confirmation of Anisotropic Pore Characteristics for ECMO Membranes Theoretically Validating the Risk of SARS-CoV-2 Permeation," 2021, Membranes
  • "Validity of Three-Dimensional Tortuous Pore Structure and Fouling of Hemoconcentration Capillary Membrane Using the Tortuous Pore Diffusion Model and Scanning Probe Microscopy," 2020, Membranes
  • "Newly Developed Pediatric Membrane Oxygenator that Suppresses Excessive Pressure Drop in Cardiopulmonary Bypass and Extracorporeal Membrane Oxygenation (ECMO)," 2020, Membranes
  • "Application of mathematical analysis on dialysis," 2022, Journal of Artificial Organs
  • "Validity of Three-Dimensional Tortuous Pore Structure and Fouling of Hemoconcentration Capillary Membrane Using the Tortuous Pore Diffusion Model and Scanning Probe Microscopy," 2020, Preprints.org

Frequent collaborators include:

  • Makoto Fukuda
  • Tomohiro Mori
  • Hitoshi Saomoto
  • Kazunori Sadano
  • Asako Tokumine

Best Publications

  • Comb-type grafted hydrogels with rapid deswelling response to temperature changes

    Ryo Yoshida;Katsumi Uchida;Yuzo Kaneko;Kiyotaka Sakai

  • Rapid Deswelling Response of Poly(N-isopropylacrylamide) Hydrogels by the Formation of Water Release Channels Using Poly(ethylene oxide) Graft Chains

    Yuzo Kaneko;Satoki Nakamura;Kiyotaka Sakai;Takao Aoyagi

  • Molecular design of biodegradable polymeric micelles for temperature-responsive drug release

    Masamichi Nakayama;Teruo Okano;Takanari Miyazaki;Fukashi Kohori

  • Preparation and characterization of thermally responsive block copolymer micelles comprising poly(N-isopropylacrylamide-b-DL-lactide).

    Fukashi Kohori;Kiyotaka Sakai;Takao Aoyagi;Masayuki Yokoyama

  • Influence of Freely Mobile Grafted Chain Length on Dynamic Properties of Comb-Type Grafted Poly(N-isopropylacrylamide) Hydrogels

    Yuzo Kaneko;Kiyotaka Sakai;Akihiko Kikuchi;Ryo Yoshida

  • Pulsatile drug delivery systems using hydrogels

    Ryo Yoshida;Kiyotaka Sakai;Teruo Okano;Yasuhisa Sakurai

  • Temperature-responsive cell culture surfaces enable "on-off" affinity control between cell integrins and RGDS ligands.

    Mitsuhiro Ebara;Masayuki Yamato;Takao Aoyagi;Akihiko Kikuchi

  • Modulating the phase transition temperature and thermosensitivity in N-isopropylacrylamide copolymer gels

    Ryo Yoshida;Kiyotaka Sakai;Teruo Okano;Yasuhisa Sakurai

  • Graft Architectural Effects on Thermoresponsive Wettability Changes of Poly(N-isopropylacrylamide)-Modified Surfaces

    Taiji Yakushiji† and;Kiyotaka Sakai;Akihiko Kikuchi;Takao Aoyagi

  • Control of adriamycin cytotoxic activity using thermally responsive polymeric micelles composed of poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide)-b-poly(d,l-lactide)

    Fukashi Kohori;Kiyotaka Sakai;Takao Aoyagi;Masayuki Yokoyama

  • Transmembrane calcium influx associated with von Willebrand factor binding to GP Ib in the initiation of shear-induced platelet aggregation

    Yasuo Ikeda;Makoto Handa;Tetsuji Kamata;Koichi Kawano

  • How polysulfone dialysis membranes containing polyvinylpyrrolidone achieve excellent biocompatibility

    Masayo Hayama;Ken Ichiro Yamamoto;Fukashi Kohori;Kiyotaka Sakai

  • Copolymerization of 2-carboxyisopropylacrylamide with N-isopropylacrylamide accelerates cell detachment from grafted surfaces by reducing temperature.

    Mitsuhiro Ebara;Masayuki Yamato;Motohiro Hirose;Takao Aoyagi

  • Effects of cross-linked structure on temperature-responsive hydrophobic interaction of poly(N-isopropylacrylamide) hydrogel-modified surfaces with steroids

    Taiji Yakushiji and;Kiyotaka Sakai;Akihiko Kikuchi;Takao Aoyagi

  • Temperature-responsive shrinking kinetics of poly (N-isopropylacrylamide) copolymer gels with hydrophilic and hydrophobic comonomers

    Yuzo Kaneko;Ryo Yoshida;Kiyotaka Sakai;Yasuhisa Sakurai

  • Determination of pore size and pore size distribution: 2. Dialysis membranes

    K. Sakai

  • Novel bifunctional polymer with reactivity and temperature sensitivity.

    Takao Aoyagi;Mitsuhiro Ebara;Kiyotaka Sakai;Yasuhisa Sakurai

  • Surface-modulated skin layers of thermal responsive hydrogels as on-off switches: I. drug release

    Ryo Yoshida;Kiyotaka Sakai;Teruo Okano;Yasuhisa Sakurai

  • Introducing Reactive Carboxyl Side Chains Retains Phase Transition Temperature Sensitivity in N-Isopropylacrylamide Copolymer Gels

    Mitsuhiro Ebara;Takao Aoyagi;Kiyotaka Sakai;Teruo Okano

  • Positive thermosensitive pulsatile drug release using negative thermosensitive hydrogels

    R. Yoshida;Y. Kaneko;K. Sakai;T. Okano

Frequent Co-Authors

Yasuhisa Sakurai
Yasuhisa Sakurai Sophia University
Teruo Okano
Teruo Okano Tokyo Women's Medical University
Ryo Yoshida
Ryo Yoshida University of Tokyo
Akihiko Kikuchi
Akihiko Kikuchi Tokyo University of Science
Takao Aoyagi
Takao Aoyagi Nihon University
Masayuki Yamato
Masayuki Yamato Tokyo Women's Medical University
Yasuo Ikeda
Yasuo Ikeda Waseda University
Makoto Handa
Makoto Handa Keio University
Kazuhiko Ishihara
Kazuhiko Ishihara University of Tokyo
Toshiyuki Takagi
Toshiyuki Takagi Tohoku University

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