World's Best Scientists 2026 revealed!

D-Index & Metrics

Biology and Biochemistry

D-Index
54
Citations
13312
World Ranking
15467
National Ranking
1095

Koichi Watashi publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Koichi Watashi sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 418 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 197 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 60 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 218 publications — 57th percentile

57% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

Koichi Watashi D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Koichi Watashi sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 72 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40 D-Index 167+

This scientist: 54 D-Index — 22nd percentile

22% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

Overview

Koichi Watashi is affiliated with the National Institute of Infectious Diseases in Japan. Their research primarily focuses on infectious diseases, with significant contributions in medicine and molecular biology.

The main fields of study covered by their work include:

  • Medicine

The subfields of study they frequently work in are:

  • Epidemiology
  • Infectious Diseases
  • Hepatology
  • Molecular Biology
  • Virology

The scientist's research topics encompass:

  • Hepatitis B Virus Studies
  • Hepatitis C virus research
  • SARS-CoV-2 and COVID-19 Research
  • Liver Disease Diagnosis and Treatment
  • COVID-19 Clinical Research Studies
  • Bacteriophages and microbial interactions
  • Poxvirus research and outbreaks

Frequent co-authors working alongside Koichi Watashi include:

  • Takaji Wakita
  • Masamichi Muramatsu
  • Shingo Iwami
  • Hirofumi Ohashi
  • Yoshimasa Takahashi

The scientist has published extensively in several venues, notably:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Journal of Virology
  • Antiviral Research
  • Nature Communications
  • Scientific Reports

Some recent papers by Koichi Watashi include:

  • "Hepatitis B virus biology and life cycle," 2020, Antiviral Research
  • "Potential anti-COVID-19 agents, cepharanthine and nelfinavir, and their usage for combination treatment," 2021, iScience
  • "A quantitative model used to compare within-host SARS-CoV-2, MERS-CoV, and SARS-CoV dynamics provides insights into the pathogenesis and treatment of SARS-CoV-2," 2021, PLoS Biology
  • "Hypoxic and pharmacological activation of HIF inhibits SARS-CoV-2 infection of lung epithelial cells," 2021, Cell Reports
  • "Structural insights into the HBV receptor and bile acid transporter NTCP," 2022, Nature

Best Publications

  • The lipid droplet is an important organelle for hepatitis C virus production.

    Yusuke Miyanari;Kimie Atsuzawa;Nobuteru Usuda;Koichi Watashi

  • Cyclosporin A suppresses replication of hepatitis C virus genome in cultured hepatocytes.

    Koichi Watashi;Makoto Hijikata;Masahiro Hosaka;Masashi Yamaji

  • Cyclophilin B Is a Functional Regulator of Hepatitis C Virus RNA Polymerase

    Koichi Watashi;Naoto Ishii;Makoto Hijikata;Daisuke Inoue

  • A global scientific strategy to cure hepatitis B

    Peter A Revill;Francis V Chisari;Joan M Block;Maura Dandri

  • The RNA sensor RIG-I dually functions as an innate sensor and direct antiviral factor for hepatitis B virus

    Seiichi Sato;Kai Li;Takeshi Kameyama;Takaya Hayashi

  • Gut Microbiota Promotes Obesity-Associated Liver Cancer through PGE2-Mediated Suppression of Antitumor Immunity.

    Tze Mun Loo;Fumitaka Kamachi;Yoshihiro Watanabe;Shin Yoshimoto

  • Cyclosporin A and its analogs inhibit hepatitis B virus entry into cultured hepatocytes through targeting a membrane transporter, sodium taurocholate cotransporting polypeptide (NTCP)

    Koichi Watashi;Ann Sluder;Takuji Daito;Takuji Daito;Satoko Matsunaga

  • Pyrosequencing of small non-coding RNAs in HIV-1 infected cells: evidence for the processing of a viral-cellular double-stranded RNA hybrid

    Man Lung Yeung;Yamina Bennasser;Koichi Watashi;Shu-Yun Le

  • Evaluation and identification of hepatitis B virus entry inhibitors using HepG2 cells overexpressing a membrane transporter NTCP.

    Masashi Iwamoto;Koichi Watashi;Koichi Watashi;Senko Tsukuda;Hussein Hassan Aly

  • Epidermal growth factor receptor is a host-entry cofactor triggering hepatitis B virus internalization

    Masashi Iwamoto;Masashi Iwamoto;Wakana Saso;Wakana Saso;Ryuichi Sugiyama;Koji Ishii

  • Hepatitis B virus biology and life cycle.

    Senko Tsukuda;Koichi Watashi

  • Diverse Effects of Cyclosporine on Hepatitis C Virus Strain Replication

    Naoto Ishii;Koichi Watashi;Takayuki Hishiki;Kaku Goto

  • Expression of activation-induced cytidine deaminase in human hepatocytes via NF-κB signaling

    Y. Endo;H. Marusawa;K. Kinoshita;T. Morisawa

  • Evaluation of the anti-hepatitis C virus effects of cyclophilin inhibitors, cyclosporin A, and NIM811

    Kaku Goto;Koichi Watashi;Takayuki Murata;Takayuki Hishiki

  • Interleukin-1 and Tumor Necrosis Factor-α Trigger Restriction of Hepatitis B Virus Infection via a Cytidine Deaminase Activation-induced Cytidine Deaminase (AID)

    Koichi Watashi;Guoxin Liang;Masashi Iwamoto;Hiroyuki Marusawa

  • Potential anti-COVID-19 agents, Cepharanthine and Nelfinavir, and their usage for combination treatment.

    Hirofumi Ohashi;Hirofumi Ohashi;Koichi Watashi;Wakana Saso;Wakana Saso;Kaho Shionoya;Kaho Shionoya

  • NTCP and Beyond: Opening the Door to Unveil Hepatitis B Virus Entry

    Koichi Watashi;Stephan Urban;Wenhui Li;Takaji Wakita

  • Antiviral Activity of Glycyrrhizin against Hepatitis C Virus In Vitro

    Yoshihiro Matsumoto;Tomokazu Matsuura;Haruyo Aoyagi;Mami Matsuda

  • Identification of Small Molecules That Suppress MicroRNA Function and Reverse Tumorigenesis

    Koichi Watashi;Man Lung Yeung;Matthew F. Starost;Ramachandra S. Hosmane

  • Novel robust in vitro hepatitis B virus infection model using fresh human hepatocytes isolated from humanized mice.

    Yuji Ishida;Chihiro Yamasaki;Ami Yanagi;Yasumi Yoshizane

Frequent Co-Authors

Takaji Wakita
Takaji Wakita National Institute of Infectious Diseases
Masamichi Muramatsu
Masamichi Muramatsu National Institutes of Health
Hideki Aizaki
Hideki Aizaki National Institutes of Health
Yasuhito Tanaka
Yasuhito Tanaka Kumamoto University
Masashi Mizokami
Masashi Mizokami National Center For Global Health and Medicine
Tetsuro Suzuki
Tetsuro Suzuki Hamamatsu University
Camille Sureau
Camille Sureau Centre national de la recherche scientifique, CNRS
Akihide Ryo
Akihide Ryo Yokohama City University
Kazuaki Chayama
Kazuaki Chayama Hiroshima University
Tadaki Suzuki
Tadaki Suzuki National Institutes of Health

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