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Ken-ichi Harada

Ken-ichi Harada

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 72 5309 4823 316 295 270 17167

Ken-ichi Harada publications per year

The chart shows the history of publications by Ken-ichi Harada between 1976 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ken-ichi Harada published across 50 years, from 1976 to 2025, averaging 6 papers a year. Output peaked at 16 publications in 1989. 4 of the 299 publications appeared in the last two years.

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

299 publications in total across all disciplines

View publications per year as a table
Ken-ichi Harada: publications per year, 1976 to 2025
Year Publications
1976 1
1977 3
1978 1
1979 4
1980 0
1981 7
1982 8
1983 9
1984 13
1985 6
1986 2
1987 9
1988 8
1989 16
1990 7
1991 11
1992 12
1993 9
1994 12
1995 13
1996 9
1997 12
1998 14
1999 7
2000 16
2001 8
2002 7
2003 2
2004 6
2005 3
2006 5
2007 9
2008 1
2009 9
2010 3
2011 5
2012 7
2013 1
2014 0
2015 4
2016 1
2017 3
2018 4
2019 0
2020 5
2021 1
2022 1
2023 1
2024 3
2025 1
Total 299
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Ken-ichi Harada 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 Ken-ichi Harada 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, 261–280 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: 270 publications — 55th percentile

55% 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
261–280 979 270
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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Ken-ichi Harada 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 Ken-ichi Harada 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, 72–73 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: 72 D-Index — 71st percentile

71% 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
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561 72
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

Ken-ichi Harada is affiliated with Meijo University in Japan and conducts research primarily within the fields of Medicine and Biochemistry, Genetics, and Molecular Biology. Their expertise spans various subfields, including Molecular Biology, Plant Science, Pharmacology, Organic Chemistry, and Rehabilitation.

The scientist's work extensively covers topics such as Magnolia and Illicium research, Natural product bioactivities and synthesis, Ginger and Zingiberaceae research, Phytochemistry and Biological Activities, Plant-derived Lignans Synthesis and Bioactivity, Chemical synthesis and alkaloids, and 14-3-3 protein interactions.

Key recent papers authored or co-authored by Ken-ichi Harada include:

  • "Cooperative regulation of PBI1 and MAPKs controls WRKY45 transcription factor in rice immunity," 2022, Nature Communications
  • "The search for, and chemistry and mechanism of, neurotrophic natural products," 2020, Journal of Natural Medicines
  • "Metabolite Profiling of Javanese Ginger Zingiber purpureum and Identification of Antiseizure Metabolites via a Low-Cost Open-Source Zebrafish Bioassay-Guided Isolation," 2020, Journal of Agricultural and Food Chemistry
  • "Chemistry and Neurotrophic Activities of (-)-Talaumidin and Its Derivatives," 2020, Frontiers in Chemistry
  • "Multifunctional chemical inhibitors of the florigen activation complex discovered by structure-based high-throughput screening," 2022, The Plant Journal

Frequent co-authors of Harada include:

  • Yoshiyasu Fukuyama
  • Miwa Kubo
  • Eiki Yamashita
  • Toshimichi Fujiwara
  • Atsushi Nakagawa

Harada's research has appeared in several notable scientific journals, with multiple publications emerging from venues such as:

  • Journal of Natural Medicines
  • Tetrahedron
  • Nature Communications
  • Journal of Agricultural and Food Chemistry
  • Phytochemistry

Best Publications

  • Inhibition of protein phosphatases by microcystins and nodularin associated with hepatotoxicity.

    Shigeru Yoshizawa;Rie Matsushima;Mariyo F. Watanabe;Ken-ichi Harada

  • Nodularin, microcystin, and the configuration of Adda

    Kenneth L. Rinehart;Kenichi. Harada;Michio. Namikoshi;Choryu. Chen

  • A Nonempirical Method Using LC/MS for Determination of the Absolute Configuration of Constituent Amino Acids in a Peptide: Combination of Marfey's Method with Mass Spectrometry and Its Practical Application

    Kiyonaga Fujii;Yoshitomo Ikai;Hisao Oka;and Makoto Suzuki

  • Electron microscopic studies on experimental poisoning in mice induced by cylindrospermopsin isolated from blue-green alga Umezakia natans.

    K. Terao;S. Ohmori;K. Igarashi;I. Ohtani

  • NAMING OF CYCLIC HEPTAPEPTIDE TOXINS OF CYANOBACTERIA (BLUE-GREEN-ALGAE)

    Wayne W. Carmichael;Val Beasley;David L. Bunner;J. N. Eloff

  • A Nonempirical Method Using LC/MS for Determination of the Absolute Configuration of Constituent Amino Acids in a Peptide: Elucidation of Limitations of Marfey's Method and of Its Separation Mechanism

    Kiyonaga Fujii;Yoshitomo Ikai;Tsuyoshi Mayumi;Hisao Oka

  • Isolation of cylindrospermopsin from a cyanobacterium Umezakia natans and its screening method

    Ken-ichi Harada;Ikuko Ohtani;Kayoko Iwamoto;Makoto Suzuki

  • Stability of microcystins from cyanobacteria: effect of light on decomposition and isomerization.

    Kiyomi. Tsuji;Shoji. Naito;Fumio. Kondo;Naohisa. Ishikawa

  • Genetic analysis of the peptide synthetase genes for a cyclic heptapeptide microcystin in Microcystis spp.

    Tomoyasu Nishizawa;Munehiko Asayama;Kiyonaga Fujii;Ken-ichi Harada

  • Polyketide Synthase Gene Coupled to the Peptide Synthetase Module Involved in the Biosynthesis of the Cyclic Heptapeptide Microcystin

    Tomoyasu Nishizawa;Akiko Ueda;Munehiko Asayama;Kiyonaga Fujii

  • Stability of microcystins from cyanobacteria--II. effect of UV light on decomposition and isomerization

    Kiyomi Tsuji;Tomohiko Watanuki;Fumio Kondo;Mariyo F. Watanabe

  • Formation, characterization, and toxicity of the glutathione and cysteine conjugates of toxic heptapeptide microcystins.

    Fumio Kondo;Yoshitomo Ikai;Hisao Oka;Masanao Okumura

  • In vitro and in vivo effects of protein phosphatase inhibitors, microcystins and nodularin, on mouse skin and fibroblasts

    Rie Matsushima;Shigeru Yoshizawa;Mariyo F. Watanabe;Ken-ichi Harada

  • Neoplastic nodular formation in mouse liver induced by repeated intraperitoneal injections of microcystin-LR

    Emiko Ito;Fumio Kondo;Kiyoshi Terao;Ken-Ichi Harada

  • Analysis and purification of toxic peptides from cyanobacteria by reversed-phase high-performance liquid chromatography

    Ken Ichi Harada;Kenji Matsuura;Makoto Suzuki;Hisao Oka

  • Stability of microcystins from cyanobacteria—III. Effect of pH and temperature

    Ken-ichi Harada;Kiyomi Tsuji;Mariyo F. Watanabe;Fumio Kondo

  • Two cyclic peptides, anabaenopeptins, a third group of bioactive compounds from the cyanobacteriumAnabaena flos-aquae NRC 525-17

    Ken-ichi Harada;Kiyonaga Fujii;Takayuki Shimada;Makoto Suzuki

  • Isolation of Adda from microcystin-LR by microbial degradation

    Ken-ichi Harada;Susumu Imanishi;Hajime Kato;Masayoshi Mizuno

  • Improved method for purification of toxic peptides produced by cyanobacteria.

    Ken ichi Harada;Makoto Suzuki;Andrew M. Dahlem;Val R. Beasley

  • Isolation and characterization of the minor components associated with microcystins LR and RR in the cyanobacterium (blue-green algae).

    Ken ichi Harada;Kenji Matsuura;Makoto Suzuki;Mariyo F. Watanabe

Frequent Co-Authors

Makoto Suzuki
Makoto Suzuki Meijo University
Yoichiro Ito
Yoichiro Ito National Institutes of Health
Hiroyuki Nakazawa
Hiroyuki Nakazawa Hoshi University
Wayne W. Carmichael
Wayne W. Carmichael Wright State University
Kaarina Sivonen
Kaarina Sivonen University of Helsinki
Val R. Beasley
Val R. Beasley Pennsylvania State University
Yoshihiro Shigemasa
Yoshihiro Shigemasa Tottori University
Hiroshi Sano
Hiroshi Sano Nara Institute of Science and Technology
Yuzuru Mikami
Yuzuru Mikami Chiba University
Tsutomu Ishikawa
Tsutomu Ishikawa Chiba University

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