World's Best Scientists 2026 revealed!
Isao Shimizu

Isao Shimizu

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 47 15707 14169 1236 1122 211 7345

Isao Shimizu publications per year

The chart shows the history of publications by Isao Shimizu between 1953 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Isao Shimizu published across 73 years, from 1953 to 2025, averaging 3 papers a year. Output peaked at 16 publications in 1985. 2 of the 218 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1953 to 2025. Vertical axis: number of publications, 0 to 16. Peak 16 publications in 1985. 1953: 1 publication 1954: 0 publications 1955: 0 publications 1956: 1 publication 1957: 0 publications 1958: 2 publications 1959: 0 publications 1960: 0 publications 1961: 0 publications 1962: 0 publications 1963: 0 publications 1964: 0 publications 1965: 0 publications 1966: 1 publication 1967: 1 publication 1968: 1 publication 1969: 1 publication 1970: 1 publication 1971: 2 publications 1972: 0 publications 1973: 0 publications 1974: 0 publications 1975: 0 publications 1976: 3 publications 1977: 1 publication 1978: 0 publications 1979: 3 publications 1980: 4 publications 1981: 2 publications 1982: 2 publications 1983: 8 publications 1984: 10 publications 1985: 16 publications 1986: 8 publications 1987: 2 publications 1988: 2 publications 1989: 5 publications 1990: 6 publications 1991: 8 publications 1992: 8 publications 1993: 11 publications 1994: 13 publications 1995: 7 publications 1996: 5 publications 1997: 12 publications 1998: 7 publications 1999: 4 publications 2000: 4 publications 2001: 12 publications 2002: 2 publications 2003: 1 publication 2004: 4 publications 2005: 7 publications 2006: 5 publications 2007: 6 publications 2008: 5 publications 2009: 0 publications 2010: 2 publications 2011: 2 publications 2012: 1 publication 2013: 0 publications 2014: 2 publications 2015: 3 publications 2016: 2 publications 2017: 0 publications 2018: 0 publications 2019: 0 publications 2020: 0 publications 2021: 0 publications 2022: 0 publications 2023: 0 publications 2024: 1 publication 2025: 1 publication
1953 2025

218 publications in total across all disciplines

View publications per year as a table
Isao Shimizu: publications per year, 1953 to 2025
Year Publications
1953 1
1954 0
1955 0
1956 1
1957 0
1958 2
1959 0
1960 0
1961 0
1962 0
1963 0
1964 0
1965 0
1966 1
1967 1
1968 1
1969 1
1970 1
1971 2
1972 0
1973 0
1974 0
1975 0
1976 3
1977 1
1978 0
1979 3
1980 4
1981 2
1982 2
1983 8
1984 10
1985 16
1986 8
1987 2
1988 2
1989 5
1990 6
1991 8
1992 8
1993 11
1994 13
1995 7
1996 5
1997 12
1998 7
1999 4
2000 4
2001 12
2002 2
2003 1
2004 4
2005 7
2006 5
2007 6
2008 5
2009 0
2010 2
2011 2
2012 1
2013 0
2014 2
2015 3
2016 2
2017 0
2018 0
2019 0
2020 0
2021 0
2022 0
2023 0
2024 1
2025 1
Total 218
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Isao Shimizu 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 Isao Shimizu 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, 201–220 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: 211 publications — 36th percentile

36% 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 1,281 211
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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Isao Shimizu 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 Isao Shimizu 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, 46–47 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: 47 D-Index — 14th percentile

14% 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 47
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

Isao Shimizu is a researcher affiliated with Waseda University in Japan. Their work spans several fields including Neuroscience, Biochemistry, Genetics and Molecular Biology, as well as Physics and Astronomy. The research focus covers subfields such as Cellular and Molecular Neuroscience, Molecular Biology, Pharmacology, Atomic and Molecular Physics, and Optics, as well as Biophysics.

Shimizu's research topics include Axon Guidance and Neuronal Signaling, Angiogenesis and VEGF in Cancer, Neuropeptides and Animal Physiology, Treatment of Major Depression, Neurotransmitter Receptor Influence on Behavior, Neuroscience and Neuropharmacology Research, and Digital Holography and Microscopy.

The scientist has published in a variety of journals, reflecting the multidisciplinary nature of their work. Frequent publication venues include:

  • International Journal of Molecular Sciences
  • Psychopharmacology
  • The European Physical Journal Applied Physics

Recent papers authored or co-authored by Shimizu include:

  • "Analysis of ADAM12-Mediated Ephrin-A1 Cleavage and Its Biological Functions," 2021, International Journal of Molecular Sciences
  • "DSP-6745, a novel 5-hydroxytryptamine modulator with rapid antidepressant, anxiolytic, antipsychotic and procognitive effects," 2024, Psychopharmacology
  • "Contrast-tuneable microscopy for single-shot real-time imaging," 2020, The European Physical Journal Applied Physics

Shimizu has collaborated frequently with several co-authors, including:

  • Katsuaki Ieguchi
  • Takeshi Tomita
  • Toshifumi Takao
  • Tsutomu Omori
  • Taishi Mishima

The diversity in Shimizu's research output demonstrates a blend of biological and physical sciences, focusing both on molecular mechanisms relevant to neuroscience and novel technological approaches such as microscopy methods.

Best Publications

  • Allylic carbonates. Efficient allylating agents of carbonucleophiles in palladium-catalyzed reactions under neutral conditions

    Jiro Tsuji;Isao Shimizu;Ichiro Minami;Yukihiro Ohashi

  • Palladium-catalyzed rearrangement of allylic esters of acetoacetic acid to give γ,δ-unsaturated methyl ketones

    Isao Shimizu;Toshiro Yamada;Jiro Tsuji

  • Palladium-catalyzed [3 + 2] cycloaddition reaction of vinylcyclopropanes with α,β-unsaturated esters or ketones

    Isao Shimizu;Yukihiro Ohashi;Jiro Tsuji

  • Novel palladium-catalyzed reactions of propargyl carbonates with carbonucleophiles under neutral conditions

    Jiro Tsuji;Hiroyuki Watanabe;Ichiro Minami;Isao Shimizu

  • Synthesis of trifluoromethyl ketones by palladium-catalyzed cross-coupling reaction of phenyl trifluoroacetate with organoboron compounds

    Ryuki Kakino;Isao Shimizu;Akio Yamamoto

  • Facile Palladium catalyzed decarboxylative allylation of active methylene compounds under neutral conditions using allylic carbonates

    Jiro Tsuji;Isao Shimizu;Ichiro Minami;Yukihiro Ohashi

  • Palladium-catalyzed allylation of ketones and aldehydes via allyl enol carbonates

    Jiro Tsuji;Ichiro Minami;Isao Shimizu

  • Palladium-catalyzed selective hydrogenolysis of alkenyloxiranes with formic acid. Stereoselectivity and synthetic utility

    Masato Oshima;Hiroyuki Yamazaki;Isao Shimizu;Mohammad Nisar

  • Reactions of allylic carbonates catalyzed by palladium, rhodium, ruthenium, molybdenum, and nickel complexes; allylation of carbonucleophiles and decarboxylation- dehydrogenation

    Ichiro Minami;Isao Shimizu;Jiro Tsuji

  • Synthesis of Unsymmetrical Ketones by Palladium-Catalyzed Cross-Coupling Reaction of Carboxylic Anhydrides with Organoboron Compounds

    Ryuki Kakino;Sayaka Yasumi;Isao Shimizu;Akio Yamamoto

  • Activation of C–O and C–N Bonds in Allylic Alcohols and Amines by Palladium Complexes Promoted by CO2. Synthetic Applications to Allylation of Nucleophiles, Carbonylation, and Allylamine Disproportionation

    Masato Sakamoto;Isao Shimizu;Akio Yamamoto

  • Palladium-catalyzed decarboxylation-allylation of allylic esters of α-substituted β-keto carboxylic, malonic, cyanoacetic, and nitroacetic acids

    Jiro Tsuji;Toshiro Yamada;Ichiro Minami;Masami Yuhara

  • New synthetic methods for α,β -unsaturated ketones, aldehydes, esters and lactones by the palladium-catalyzed reactions of silyl enol ethers, ketene silyl acetals, and enol acetates with allyl carbonates

    Ichiro Minami;Kazuhiko Takahashi;Isao Shimizu;Tsuneo Kimura

  • Palladium-catalyzed decarboxylation-dehydrogenation of allyl .beta.-oxo carboxylates and allyl enol carbonates as a novel synthetic method for .alpha.-substituted .alpha.,.beta.-unsaturated ketones

    Isao Shimizu;Jiro Tsuji

  • Convenient general synthetic method for 1,4- and 1,5-diketones by palladium catalyzed oxidation of α-allyl and α-3-butenyl ketones

    Jiro Tsuji;Isao Shimizu;Keiji Yamamoto

  • Palladium-Catalyzed Direct Conversion of Carboxylic Acids into Ketones with Organoboronic Acids Promoted by Anhydride Activators

    Ryuki Kakino;Hirohisa Narahashi;Isao Shimizu;Akio Yamamoto

  • Facile palladium-catalyzed decarboxylation reaction of allylic .beta.-keto esters

    Jiro Tsuji;Mohammad Nisar;Isao Shimizu

  • Allyation of carbonucleophiles with allylic carbonates under neutral conditions catalyzed by rhodium complexes

    Jiro Tsuji;Ichiro Minami;Isao Shimizu

  • Palladium-catalyzed reaction of allyl carbamates; allylation of carbonucleophiles, and protection-deprotection of amines

    Ichiro Minami;Yukihiro Ohashi;Isao Shimizu;Jiro Tsuji

  • Preparation of 1-Alkenes by the Palladium-Catalyzed Hydrogenolysis of Terminal Allylic Carbonates and Acetates with Formic Acid-Triethylamine

    Jiro Tsuji;Ichiro Minami;Isao Shimizu

  • Palladium-Catalyzed Cleavage of P-C Bonds in Quaternary Phosphonium Salts and Its Applications to Organic Synthesis

    Masato Sakamoto;Isao Shimizu;Akio Yamamoto

Frequent Co-Authors

Jiro Tsuji
Jiro Tsuji Tokyo Institute of Technology
Akio Yamamoto
Akio Yamamoto Waseda University
Toshio Kamiya
Toshio Kamiya Tokyo Institute of Technology
Fumiyuki Ozawa
Fumiyuki Ozawa Kyoto University
Takashi Takahashi
Takashi Takahashi Nagoya University

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