World's Best Scientists 2026 revealed!
Toshimasa Toyo'oka

Toshimasa Toyo'oka

D-Index & Metrics

Chemistry

D-Index
63
Citations
11187
World Ranking
8630
National Ranking
584

Toshimasa Toyo'oka 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 Toshimasa Toyo'oka 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: 308 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.

Toshimasa Toyo'oka 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 Toshimasa Toyo'oka 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: 63 D-Index — 54th percentile

54% of scientists in this discipline score the same or lower.

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

Overview

Toshimasa Toyo'oka is affiliated with the University of Shizuoka in Japan and has focused their research primarily within the field of Biochemistry, Genetics and Molecular Biology. Their work covers a range of subfields including Molecular Biology, Spectroscopy, Biomedical Engineering, Radiology, Nuclear Medicine and Imaging, and Clinical Biochemistry.

The central themes of Toyo'oka's research involve advanced biosensing and bioanalysis techniques, monoclonal and polyclonal antibodies research, mass spectrometry techniques and applications, metabolomics and mass spectrometry studies, analytical chemistry and chromatography, RNA interference and gene delivery, as well as innovative microfluidic and catalytic techniques innovation.

They have published numerous papers, some of which include:

  • Development of a DNA aptamer that binds to the complementarity-determining region of therapeutic monoclonal antibody and affinity improvement induced by pH-change for sensitive detection (2022, Biosensors and Bioelectronics)
  • Rapid chiral discrimination of oncometabolite dl-2-hydroxyglutaric acid using derivatization and field asymmetric waveform ion mobility spectrometry/mass spectrometry (2021, Journal of Separation Science)
  • Machine learning guided prediction of liquid chromatography-mass spectrometry ionization efficiency for genotoxic impurities in pharmaceutical products (2020, Journal of Pharmaceutical and Biomedical Analysis)
  • Development of a selective and sensitive analytical method to detect isomerized aspartic acid residues in crystallin using a combination of derivatization and liquid chromatography mass spectrometry (2020, Journal of Chromatography A)
  • Efficient screening of anti-idiotype DNA aptamers that bind specifically to trastuzumab for bioanalytical applications (2023, Journal of Pharmaceutical and Biomedical Analysis Open)

Toyo'oka has frequently published in venues such as Chromatography, Biosensors and Bioelectronics, Journal of Separation Science, Journal of Pharmaceutical and Biomedical Analysis, and Journal of Chromatography A.

The scientist has collaborated repeatedly with several co-authors, including:

  • Hajime Mizuno
  • Kenichiro Todoroki
  • Eiji Sugiyama
  • Hideki Hayashi
  • Kaori Tsukakoshi

Best Publications

  • Creation of an On-Chip Enzyme Reactor by Encapsulating Trypsin in Sol−Gel on a Plastic Microchip

    Kumiko Sakai-Kato;Masaru Kato;Toshimasa Toyo'oka

  • A Protein-Encapsulation Technique by the Sol−Gel Method for the Preparation of Monolithic Columns for Capillary Electrochromatography

    Masaru Kato;Kumiko Sakai-Kato;Nozomi Matsumoto;Toshimasa Toyo'oka

  • Recent advances in separation and detection methods for thiol compounds in biological samples.

    Toshimasa Toyo’oka

  • A novel fluorogenic reagent for thiols : ammonium 7-fluorobenzo-2-oxa-1, 3-diazole-4-sulfonate

    Kazuhiro Imai;Toshimasa Toyo'oka;Yoshihiko Watanabe

  • High-performance liquid chromatography and fluorometric detection of biologically important thiols, derivatized with ammonium 7-fluorobenzo-2-oxa-1,3-diazole-4-sulphonate (SBD-F)

    Toshimasa Toyo'oka;Kazuhiro Imai

  • On-line trypsin-encapsulated enzyme reactor by the sol-gel method integrated into capillary electrophoresis.

    Kumiko Sakai-Kato;and Masaru Kato;Toshimasa Toyo'oka

  • New fluorogenic reagent having halogenobenzofurazan structure for thiols: 4-(aminosulfonyl)-7-fluoro-2,1,3-benzoxadiazole

    Toshimasa. Toyooka;Kazuhiro. Imai

  • Integration of on-line protein digestion, peptide separation, and protein identification using pepsin-coated photopolymerized sol-gel columns and capillary electrophoresis/mass spectrometry.

    Masaru Kato;† Kumiko Sakai-Kato;HongMei Jin;Kazuyuki Kubota

  • Simple and practical derivatization procedure for enhanced detection of carboxylic acids in liquid chromatography-electrospray ionization-tandem mass spectrometry.

    Tatsuya Higashi;Takuya Ichikawa;Shinsuke Inagaki;Jun Zhe Min

  • Fluorigenic reagents for primary and secondary amines and thiols in high-performance liquid chromatography. A review

    Kazuhiro Imai;Toshimasa Toyo'oka;Hiroshi Miyano

  • Silica sol‐gel monolithic materials and their use in a variety of applications

    Masaru Kato;Kumiko Sakai-Kato;Toshimasa Toyo'oka

  • Precolumn fluorescence tagging reagent for carboxylic acids in high-performance liquid chromatography: 4-substituted-7-aminoalkylamino-2,1,3-benzoxadiazoles.

    Toshimasa Toyo'oka;Mumio Ishibashi;Yasushi Takeda;Kenichiro Nakashima

  • Resolution of chiral drugs by liquid chromatography based upon diastereomer formation with chiral derivatization reagents.

    Toshimasa Toyo'oka

  • Simultaneous determination of D- and L-serine in rat brain microdialysis sample using a column-switching HPLC with fluorimetric detection.

    Takeshi Fukushima;Takeshi Fukushima;Junko Kawai;Kazuhiro Imai;Kazuhiro Imai;Toshimasa Toyo'oka

  • Advances in determination of vitamin D related compounds in biological samples using liquid chromatography-mass spectrometry: a review.

    Tatsuya Higashi;Kazutake Shimada;Toshimasa Toyo’oka

  • Monolithic bioreactor immobilizing trypsin for high-throughput analysis.

    Masaru Kato;Kenji Inuzuka;Kumiko Sakai-Kato;Toshimasa Toyo'oka

  • Further studies on the reaction of amines and proteins with 4-fluoro-7-nitrobenzo-2-oxa-1,3-diazole

    Hiroshi Miyano;Toshimasa Toyo'oka;Kazuhiro Imai

  • Fluorogenic reagent for thiols: 4-(N,N-dimethylaminosulphonyl)-7-fluoro-2,1,3-benzoxadiazole.

    Toshimasa Toyo′oka;Takashi Suzuki;Yukio Saito;Sonoko Uzu

  • Fluorescent tagging of physiologically important carboxylic acids, including fatty acids, for their detection in liquid chromatography

    Toshimasa Toyo’oka

  • Isolation and characterization of cysteine-containing regions of proteins using 4-(aminosulfonyl)-7-fluoro-2,1,3-benzoxadiazole and high-performance liquid chromatography.

    Toshimasa. Toyo'oka;Kazuhiro. Imai

Frequent Co-Authors

Kazuhiro Imai
Kazuhiro Imai University of Tokyo
Noriyuki Matsukawa
Noriyuki Matsukawa Nagoya City University
Yukihiro Goda
Yukihiro Goda Ministry of Health Labour and Welfare
Kenji Hashimoto
Kenji Hashimoto Chiba University
Richard N. Zare
Richard N. Zare Stanford University
Makoto Michikawa
Makoto Michikawa Nagoya City University
Naoki Miyata
Naoki Miyata Nagoya City University
Kazunori Ikebukuro
Kazunori Ikebukuro Tokyo University of Agriculture and Technology
Ikuo Tooyama
Ikuo Tooyama Shiga University of Medical Science
Yong-Ill Lee
Yong-Ill Lee Changwon National University

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