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Toshimasa Toyo'oka

Toshimasa Toyo'oka

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 63 8630 7827 584 543 308 11187

Toshimasa Toyo'oka publications per year

The chart shows the history of publications by Toshimasa Toyo'oka between 1975 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Toshimasa Toyo'oka published across 51 years, from 1975 to 2025, averaging 6.1 papers a year. Output peaked at 16 publications in 2007. 4 of the 313 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1975 to 2025. Vertical axis: number of publications, 0 to 16. Peak 16 publications in 2007. 1975: 1 publication 1976: 1 publication 1977: 0 publications 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 1 publication 1982: 1 publication 1983: 4 publications 1984: 5 publications 1985: 4 publications 1986: 2 publications 1987: 3 publications 1988: 3 publications 1989: 10 publications 1990: 0 publications 1991: 3 publications 1992: 4 publications 1993: 4 publications 1994: 9 publications 1995: 7 publications 1996: 3 publications 1997: 6 publications 1998: 7 publications 1999: 9 publications 2000: 2 publications 2001: 6 publications 2002: 8 publications 2003: 9 publications 2004: 14 publications 2005: 11 publications 2006: 8 publications 2007: 16 publications 2008: 13 publications 2009: 14 publications 2010: 10 publications 2011: 11 publications 2012: 9 publications 2013: 16 publications 2014: 15 publications 2015: 14 publications 2016: 11 publications 2017: 12 publications 2018: 6 publications 2019: 8 publications 2020: 4 publications 2021: 2 publications 2022: 1 publication 2023: 2 publications 2024: 3 publications 2025: 1 publication
1975 2025

313 publications in total across all disciplines

View publications per year as a table
Toshimasa Toyo'oka: publications per year, 1975 to 2025
Year Publications
1975 1
1976 1
1977 0
1978 0
1979 0
1980 0
1981 1
1982 1
1983 4
1984 5
1985 4
1986 2
1987 3
1988 3
1989 10
1990 0
1991 3
1992 4
1993 4
1994 9
1995 7
1996 3
1997 6
1998 7
1999 9
2000 2
2001 6
2002 8
2003 9
2004 14
2005 11
2006 8
2007 16
2008 13
2009 14
2010 10
2011 11
2012 9
2013 16
2014 15
2015 14
2016 11
2017 12
2018 6
2019 8
2020 4
2021 2
2022 1
2023 2
2024 3
2025 1
Total 313
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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.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 301–320 publications, is where this scientist sits. 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
61–80 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.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764 308
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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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.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 62–63 D-Index, is where this scientist sits. 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
40–41 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.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834 63
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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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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