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Hayato Ishikawa

Hayato Ishikawa

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 45 16391 14790 1292 1170 143 7851

Hayato Ishikawa publications per year

The chart shows the history of publications by Hayato Ishikawa between 1993 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Hayato Ishikawa published across 33 years, from 1993 to 2025, averaging 5.3 papers a year. Output peaked at 15 publications in 2011. 19 of the 175 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1993 to 2025. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 2011. 1993: 1 publication 1994: 0 publications 1995: 0 publications 1996: 0 publications 1997: 0 publications 1998: 1 publication 1999: 1 publication 2000: 0 publications 2001: 1 publication 2002: 4 publications 2003: 0 publications 2004: 3 publications 2005: 6 publications 2006: 11 publications 2007: 3 publications 2008: 14 publications 2009: 13 publications 2010: 8 publications 2011: 15 publications 2012: 3 publications 2013: 6 publications 2014: 1 publication 2015: 3 publications 2016: 9 publications 2017: 7 publications 2018: 9 publications 2019: 4 publications 2020: 4 publications 2021: 7 publications 2022: 11 publications 2023: 11 publications 2024: 9 publications 2025: 10 publications
1993 2025

175 publications in total across all disciplines

View publications per year as a table
Hayato Ishikawa: publications per year, 1993 to 2025
Year Publications
1993 1
1994 0
1995 0
1996 0
1997 0
1998 1
1999 1
2000 0
2001 1
2002 4
2003 0
2004 3
2005 6
2006 11
2007 3
2008 14
2009 13
2010 8
2011 15
2012 3
2013 6
2014 1
2015 3
2016 9
2017 7
2018 9
2019 4
2020 4
2021 7
2022 11
2023 11
2024 9
2025 10
Total 175
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Hayato Ishikawa 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 Hayato Ishikawa 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, 141–160 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: 143 publications — 12th percentile

12% 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 1,218 143
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
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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Hayato Ishikawa 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 Hayato Ishikawa 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, 44–45 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: 45 D-Index — 10th percentile

10% 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 45
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
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

Hayato Ishikawa is affiliated with Kumamoto University in Japan. Their research spans the fields of Biochemistry, Genetics and Molecular Biology, and Chemistry, with significant contributions to Pharmacology, Organic Chemistry, Molecular Biology, Materials Chemistry, and Biochemistry as specialized subfields.

The main topics of research addressed in Ishikawa's work include:

  • Alkaloids: synthesis and pharmacology
  • Traditional and Medicinal Uses of Annonaceae
  • Chemical synthesis and alkaloids
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Natural product bioactivities and synthesis
  • Microbial Natural Products and Biosynthesis

Frequently published venues for Ishikawa's work include:

  • The Cambridge Structural Database
  • Chemistry - A European Journal
  • Chemical and Pharmaceutical Bulletin
  • Journal of Synthetic Organic Chemistry Japan
  • Organic Letters

Frequent coauthors collaborating with Ishikawa are:

  • Mariko Kitajima
  • Jukiya Sakamoto
  • Kenta Rakumitsu
  • Lia Dewi Juliawaty
  • Shinichiro Sawa

Selected papers published by Hayato Ishikawa include:

  • Total Syntheses of (−)-Strictosidine and Related Indole Alkaloid Glycosides, 2020, Angewandte Chemie International Edition
  • Root-knot nematode chemotaxis is positively regulated by l-galactose sidechains of mucilage carbohydrate rhamnogalacturonan-I, 2021, Science Advances
  • 5,6-Dihydro-α-pyrones from the leaves of Cryptocarya pulchinervia (Lauraceae), 2020, Journal of Natural Medicines
  • Bioinspired Transformations Using Strictosidine Aglycones: Divergent Total Syntheses of Monoterpenoid Indole Alkaloids in the Early Stage of Biosynthesis, 2021, Chemistry - A European Journal
  • Epoxyquinophomopsins A and B from endophytic fungus Phomopsis sp. and their activity against tyrosine kinase, 2020, Journal of Natural Medicines

Best Publications

  • High‐Yielding Synthesis of the Anti‐Influenza Neuramidase Inhibitor (−)‐Oseltamivir by Three “One‐Pot” Operations

    Hayato Ishikawa;Takaki Suzuki;Yujiro Hayashi

  • Total synthesis of vinblastine, vincristine, related natural products, and key structural analogues.

    Hayato Ishikawa;David A. Colby;Shigeki Seto;Porino Va

  • Studies on the synthesis and opioid agonistic activities of mitragynine-related indole alkaloids: discovery of opioid agonists structurally different from other opioid ligands.

    Hiromitsu Takayama;Hayato Ishikawa;Mika Kurihara;Mariko Kitajima

  • Asymmetric Michael Reaction of Acetaldehyde Catalyzed by Diphenylprolinol Silyl Ether

    Yujiro Hayashi;Takahiko Itoh;Masahiro Ohkubo;Hayato Ishikawa

  • Diphenylprolinol Silyl Ether as Catalyst of an Asymmetric, Catalytic, and Direct Michael Reaction of Nitroalkanes with α,β-Unsaturated Aldehydes

    Hiroaki Gotoh;Hayato Ishikawa;Yujiro Hayashi

  • Asymmetric aldol reaction of acetaldehyde and isatin derivatives for the total syntheses of ent-convolutamydine E and CPC-1 and a half fragment of madindoline A and B.

    Takahiko Itoh;Hayato Ishikawa;Yujiro Hayashi

  • Antinociceptive effect of 7-hydroxymitragynine in mice: Discovery of an orally active opioid analgesic from the Thai medicinal herb Mitragyna speciosa.

    Kenjiro Matsumoto;Syunji Horie;Hayato Ishikawa;Hiromitsu Takayama

  • A diarylprolinol in an asymmetric, catalytic, and direct crossed-aldol reaction of acetaldehyde.

    Yujiro Hayashi;Takahiko Itoh;Seiji Aratake;Hayato Ishikawa

  • Organocatalyzed Michael Addition of Aldehydes to Nitro Alkenes – Generally Accepted Mechanism Revisited and Revised

    Krystyna Patora-Komisarska;Krystyna Patora-Komisarska;Meryem Benohoud;Hayato Ishikawa;Dieter Seebach

  • Total synthesis of (-)- and ent-(+)-vindoline and related alkaloids

    Hayato Ishikawa;Gregory I. Elliott;Juraj Velcicky;Younggi Choi

  • Direct Coupling of Catharanthine and Vindoline to Provide Vinblastine: Total Synthesis of (+)- and ent-(−)-Vinblastine

    Hayato Ishikawa;David A. Colby;Dale L. Boger

  • Asymmetric Diels–Alder Reactions of α,β‐Unsaturated Aldehydes Catalyzed by a Diarylprolinol Silyl Ether Salt in the Presence of Water

    Yujiro Hayashi;Sampak Samanta;Hiroaki Gotoh;Hayato Ishikawa

  • Oxidative and enantioselective cross-coupling of aldehydes and nitromethane catalyzed by diphenylprolinol silyl ether.

    Yujiro Hayashi;Takahiko Itoh;Hayato Ishikawa

  • High‐Yielding Synthesis of the Anti‐Influenza Neuraminidase Inhibitor (−)‐Oseltamivir by Two “One‐Pot” Sequences

    Hayato Ishikawa;Takaki Suzuki;Hideo Orita;Tadafumi Uchimaru

  • One-Pot High-Yielding Synthesis of the DPP4-Selective Inhibitor ABT-341 by a Four-Component Coupling Mediated by a Diphenylprolinol Silyl Ether†

    Hayato Ishikawa;Masakazu Honma;Yujiro Hayashi

  • Total Synthesis of (−)- and ent-(+)-Vindoline

    Younggi Choi;Hayato Ishikawa;Juraj Velcicky;Gregory I. Elliott

  • Dimerization of indole derivatives with hypervalent iodines(III): a new entry for the concise total synthesis of rac- and meso-chimonanthines

    Hayato Ishikawa;Hiromitsu Takayama;Norio Aimi

  • Direct organocatalytic mannich reaction of acetaldehyde: an improved catalyst and mechanistic insight from a computational study.

    Yujiro Hayashi;Tsubasa Okano;Takahiko Itoh;Tatsuya Urushima

  • Antinociception, tolerance and withdrawal symptoms induced by 7-hydroxymitragynine, an alkaloid from the Thai medicinal herb Mitragyna speciosa.

    Kenjiro Matsumoto;Syunji Horie;Syunji Horie;Hiromitsu Takayama;Hayato Ishikawa

  • Diphenylprolinol silyl ether catalysis in an asymmetric formal carbo [3 + 3] cycloaddition reaction via a domino Michael/Knoevenagel condensation.

    Yujiro Hayashi;Maya Toyoshima;Hiroaki Gotoh;Hayato Ishikawa

  • Intramolecular diels-alder/1,3-dipolar cycloaddition cascade of 1,3,4-oxadiazoles.

    Gregory I. Elliott;James R. Fuchs;Brian S. J. Blagg;Hayato Ishikawa

Frequent Co-Authors

Yujiro Hayashi
Yujiro Hayashi Tohoku University
Dale L. Boger
Dale L. Boger Scripps Research Institute
Hiromitsu Takayama
Hiromitsu Takayama Chiba University
Hiroyuki Koshino
Hiroyuki Koshino Tokyo University of Agriculture
Mariko Kitajima
Mariko Kitajima Chiba University
Shinichiro Sawa
Shinichiro Sawa Kumamoto University
Hideaki Kakeya
Hideaki Kakeya Kyoto University
Sachiko Tsukamoto
Sachiko Tsukamoto Kumamoto University
Brian S. J. Blagg
Brian S. J. Blagg University of Notre Dame

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