World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
53
Citations
9493
World Ranking
13123
National Ranking
993

Isao Kouno 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 Kouno 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: 193 publications — 30th percentile

30% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Isao Kouno 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 Kouno 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: 53 D-Index — 28th percentile

28% of scientists in this discipline score the same or lower.

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

Overview

Isao Kouno is affiliated with Nagasaki University in Japan. Their academic profile reflects a focus on research, although specific details about publication history, fields of study, and collaborative networks are not available.

No recent papers, co-authors, or frequent publication venues are listed for Isao Kouno. Additionally, there are no records of book publications or awards associated with their name.

The lack of specified main fields, subfields, and topics of study indicates limited publicly available information about particular research areas or specialties.

Given the available data, Isao Kouno's professional and research contributions are currently undocumented in accessible bibliometric or academic databases.

Best Publications

  • Facile Discrimination of Aldose Enantiomers by Reversed-Phase HPLC

    Takashi Tanaka;Tatsuya Nakashima;Toshihisa Ueda;Kenji Tomii

  • Antimicrobial Activity of 10 Different Plant Polyphenols against Bacteria Causing Food-Borne Disease

    Toshitsugu Taguri;Takashi Tanaka;Isao Kouno

  • Antibacterial Spectrum of Plant Polyphenols and Extracts Depending upon Hydroxyphenyl Structure

    Toshitsugu Taguri;Takashi Tanaka;Isao Kouno

  • Chemistry of secondary polyphenols produced during processing of tea and selected foods.

    Takashi Tanaka;Yosuke Matsuo;Isao Kouno

  • Phyllanemblinins A-F, new ellagitannins from Phyllanthus emblica.

    Ying-Jun Zhang;Tomomi Abe;Takashi Tanaka;Chong-Ren Yang

  • Synthesis of theaflavin from epicatechin and epigallocatechin by plant homogenates and role of epicatechin quinone in the synthesis and degradation of theaflavin.

    Takashi Tanaka;Chie Mine;Kyoko Inoue;Miyuki Matsuda

  • Antiproliferative Activity of the Main Constituents from Phyllanthus emblica

    Ying-Jun Zhang;Ying-Jun Zhang;Tsuneatsu Nagao;Takashi Tanaka;Chong-Ren Yang

  • Chemical evidence for the de-astringency (insolubilization of tannins) of persimmon fruit

    Takashi Tanaka;Ryuji Takahashi;Isao Kouno;Gen-ichiro Nonaka

  • α-Amylase and lipase inhibitory activity and structural characterization of acacia bark proanthocyanidins.

    Rie Kusano;Sosuke Ogawa;Yosuke Matsuo;Takashi Tanaka

  • Oxidation of Tea Catechins: Chemical Structures and Reaction Mechanism

    Takashi Tanaka;Isao Kouno

  • Suppression of tumor cell invasiveness by hydrolyzable tannins (plant polyphenols) via the inhibition of matrix metalloproteinase-2/-9 activity.

    Susumu Tanimura;Ryoji Kadomoto;Takashi Tanaka;Ying-Jun Zhang

  • Production of theasinensins A and D, epigallocatechin gallate dimers of black tea, by oxidation–reduction dismutation of dehydrotheasinensin A

    Takashi Tanaka;Sayaka Watarumi;Yosuke Matsuo;Midori Kamei

  • Phyllaemblic acid, a novel highly oxygenated norbisabolane from the roots of Phyllanthus emblica

    Ying-Jun Zhang;Takashi Tanaka;Yoko Iwamoto;Chong-Ren Yang

  • New phenolic constituents from the fruit juice of Phyllanthus emblica.

    Ying-Jun Zhang;Takashi Tanaka;Chong-Ren Yang;Isao Kouno

  • Two types of oxidative dimerization of the black tea polyphenol theaflavin

    Takashi Tanaka;Kyoko Inoue;Yayoi Betsumiya;Chie Mine

  • Polymer-like polyphenols of black tea and their lipase and amylase inhibitory activities.

    Rie Kusano;Hisashi Andou;Miho Fujieda;Takashi Tanaka

  • Novel Norsesquiterpenoids from the Roots of Phyllanthus emblica

    Ying-Jun Zhang;Takashi Tanaka;Yoko Iwamoto;Chong-Ren Yang

  • Trypanocidal activity of extracts and compounds from the stem bark of Anogeissus leiocarpus and Terminalia avicennoides.

    Mohammed N. Shuaibu;Ponchang T. A. Wuyep;Tetsuo Yanagi;Kenji Hirayama

  • Studies on a Medicinal Parasitic Plant: Lignans from the Stems of Cynomorium songaricum

    Zhi-Hong Jiang;Takashi Tanaka;Masafumi Sakamoto;Tong Jiang

  • A new catechin oxidation product and polymeric polyphenols of post-fermented tea

    He Yuan Jiang;Takuya Shii;Yosuke Matsuo;Takashi Tanaka

Frequent Co-Authors

Takashi Tanaka
Takashi Tanaka Nagasaki University
Gen-ichiro Nonaka
Gen-ichiro Nonaka Kyushu University
Zhi-Hong Jiang
Zhi-Hong Jiang Macau University of Science and Technology
Itsuo Nishioka
Itsuo Nishioka Kyushu University
Koichiro Shimomura
Koichiro Shimomura Toyo University
Toshiro Matsui
Toshiro Matsui Kyushu University
Toru Nagasawa
Toru Nagasawa Kyoto University
Dong Wang
Dong Wang Peking University
Hideaki Yamada
Hideaki Yamada National Institute of Advanced Industrial Science and Technology

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