World's Best Scientists 2026 revealed!
Haruhiko Siomi

Haruhiko Siomi

D-Index & Metrics

Genetics

D-Index
66
Citations
23046
World Ranking
2582
National Ranking
100

Haruhiko Siomi publication distribution in Genetics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Genetics in 2026. The highlighted bar marks where Haruhiko Siomi sits on this spectrum.

45–54 publications: 6 scientists 55–64 publications: 10 scientists 65–74 publications: 35 scientists 75–84 publications: 84 scientists 85–94 publications: 102 scientists 95–104 publications: 151 scientists 105–114 publications: 175 scientists 115–124 publications: 203 scientists 125–134 publications: 217 scientists 135–144 publications: 205 scientists 145–154 publications: 193 scientists 155–164 publications: 188 scientists 165–174 publications: 170 scientists 175–184 publications: 178 scientists 185–194 publications: 164 scientists 195–204 publications: 173 scientists 205–214 publications: 159 scientists 215–224 publications: 134 scientists 225–234 publications: 143 scientists 235–244 publications: 105 scientists 245–254 publications: 114 scientists 255–264 publications: 92 scientists 265–274 publications: 88 scientists 275–284 publications: 87 scientists 285–294 publications: 80 scientists 295–304 publications: 62 scientists 305–314 publications: 75 scientists 315–324 publications: 67 scientists 325–334 publications: 60 scientists 335–344 publications: 52 scientists 345–354 publications: 40 scientists 355–364 publications: 48 scientists 365–374 publications: 47 scientists 375–384 publications: 46 scientists 385–394 publications: 31 scientists 395–404 publications: 27 scientists 405–414 publications: 40 scientists 415–424 publications: 30 scientists 425–434 publications: 43 scientists 435–444 publications: 29 scientists 445–454 publications: 14 scientists 455–464 publications: 28 scientists 465–474 publications: 21 scientists 475–484 publications: 21 scientists 485–494 publications: 22 scientists 495–504 publications: 17 scientists 505–514 publications: 12 scientists 515–524 publications: 11 scientists 525–534 publications: 8 scientists 535–544 publications: 8 scientists 545–554 publications: 14 scientists 555–564 publications: 4 scientists 565–574 publications: 11 scientists 575–584 publications: 5 scientists 585–594 publications: 11 scientists 595–604 publications: 12 scientists 605–614 publications: 7 scientists 615–624 publications: 6 scientists 625–634 publications: 10 scientists 635–644 publications: 9 scientists 645–654 publications: 10 scientists 655–664 publications: 6 scientists 665–674 publications: 6 scientists 675–684 publications: 6 scientists 685–694 publications: 4 scientists 695–702 publications: 6 scientists 703+ publications: 100 scientists
45 publications 703+

This scientist: 169 publications — 38th percentile

38% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 703 publications or more.

Haruhiko Siomi D-index placement in Genetics in 2026

The chart shows the D-index (discipline H-index) distribution of Genetics scientists ranked by Research.com in 2026. The highlighted bar marks where Haruhiko Siomi sits on this spectrum.

40–41 D-Index: 24 scientists 42–43 D-Index: 52 scientists 44–45 D-Index: 84 scientists 46–47 D-Index: 112 scientists 48–49 D-Index: 118 scientists 50–51 D-Index: 141 scientists 52–53 D-Index: 143 scientists 54–55 D-Index: 145 scientists 56–57 D-Index: 179 scientists 58–59 D-Index: 162 scientists 60–61 D-Index: 175 scientists 62–63 D-Index: 191 scientists 64–65 D-Index: 172 scientists 66–67 D-Index: 184 scientists 68–69 D-Index: 164 scientists 70–71 D-Index: 158 scientists 72–73 D-Index: 150 scientists 74–75 D-Index: 136 scientists 76–77 D-Index: 127 scientists 78–79 D-Index: 127 scientists 80–81 D-Index: 111 scientists 82–83 D-Index: 110 scientists 84–85 D-Index: 110 scientists 86–87 D-Index: 84 scientists 88–89 D-Index: 102 scientists 90–91 D-Index: 66 scientists 92–93 D-Index: 72 scientists 94–95 D-Index: 70 scientists 96–97 D-Index: 54 scientists 98–99 D-Index: 60 scientists 100–101 D-Index: 49 scientists 102–103 D-Index: 55 scientists 104–105 D-Index: 45 scientists 106–107 D-Index: 42 scientists 108–109 D-Index: 28 scientists 110–111 D-Index: 39 scientists 112–113 D-Index: 25 scientists 114–115 D-Index: 31 scientists 116–117 D-Index: 29 scientists 118–119 D-Index: 34 scientists 120–121 D-Index: 29 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 18 scientists 126–127 D-Index: 27 scientists 128–129 D-Index: 22 scientists 130–131 D-Index: 16 scientists 132–133 D-Index: 11 scientists 134–135 D-Index: 17 scientists 136–137 D-Index: 12 scientists 138–139 D-Index: 21 scientists 140–141 D-Index: 4 scientists 142–143 D-Index: 9 scientists 144–145 D-Index: 14 scientists 146–147 D-Index: 6 scientists 148–149 D-Index: 10 scientists 150–151 D-Index: 7 scientists 152–153 D-Index: 9 scientists 154–155 D-Index: 8 scientists 156–157 D-Index: 8 scientists 158–159 D-Index: 9 scientists 160+ D-Index: 96 scientists
40 D-Index 160+

This scientist: 66 D-Index — 41st percentile

41% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 160 D-Index or more.

Overview

Haruhiko Siomi is affiliated with Keio University in Japan and has contributed extensively to the fields of biochemistry, genetics, and molecular biology. Their research spans multiple areas including molecular biology, plant science, infectious diseases, genetics, and immunology. The scientist's work covers topics such as chromosomal and genetic variations, CRISPR and genetic engineering, SARS-CoV-2 and COVID-19 research, genomics and chromatin dynamics, COVID-19 clinical research studies, SARS-CoV-2 detection and testing, and RNA research and splicing.

Siomi has published in several notable scientific venues. Frequent publication outlets include bioRxiv (Cold Spring Harbor Laboratory) with 11 publications, Nucleic Acids Research and Science Advances with 2 publications each, and Nature Genetics and Nature Communications with 1 publication each.

Recent papers authored or co-authored by Siomi highlight diverse molecular biology topics. These papers include:

  • Transcription of MERVL retrotransposons is required for preimplantation embryo development (2023, Nature Genetics)
  • Crystal structure of Drosophila Piwi (2020, Nature Communications)
  • Production of functional oocytes requires maternally expressed PIWI genes and piRNAs in golden hamsters (2021, Nature Cell Biology)
  • Hamster PIWI proteins bind to piRNAs with stage-specific size variations during oocyte maturation (2021, Nucleic Acids Research)
  • Piwi suppresses transcription of Brahma-dependent transposons via Maelstrom in ovarian somatic cells (2020, Science Advances)

Throughout their career, Siomi has collaborated frequently with several co-authors. The most frequent collaborators include Kensaku Murano and Yuka W. Iwasaki with 14 joint publications each, Hirotsugu Ishizu with 12, Youjia Guo with 11, and Tomohiro Kitano with 8 publications.

Best Publications

  • A slicer-mediated mechanism for repeat-associated siRNA 5' end formation in Drosophila.

    Lalith S. Gunawardane;Kuniaki Saito;Kazumichi M. Nishida;Keita Miyoshi

  • Distinct roles for Argonaute proteins in small RNA-directed RNA cleavage pathways

    Katsutomo Okamura;Akira Ishizuka;Haruhiko Siomi;Mikiko C. Siomi

  • On the road to reading the RNA-interference code.

    Haruhiko Siomi;Mikiko C. Siomi

  • The protein product of the fragile X gene, FMR1, has characteristics of an RNA-binding protein.

    Haruhiko Siomi;Mikiko C. Siomi;Robert L. Nussbaum;Gideon Dreyfuss

  • A Drosophila fragile X protein interacts with components of RNAi and ribosomal proteins

    Akira Ishizuka;Mikiko C. Siomi;Haruhiko Siomi

  • Specific association of Piwi with rasiRNAs derived from retrotransposon and heterochromatic regions in the Drosophila genome

    Kuniaki Saito;Kazumichi M. Nishida;Tomoko Mori;Yoshinori Kawamura

  • Posttranscriptional regulation of microRNA biogenesis in animals.

    Haruhiko Siomi;Mikiko C. Siomi

  • The dsRNA Binding Protein RDE-4 Interacts with RDE-1, DCR-1, and a DExH-Box Helicase to Direct RNAi in C. elegans

    Hiroaki Tabara;Erbay Yigit;Haruhiko Siomi;Craig C. Mello

  • The pre-mRNA binding K protein contains a novel evolutionary conserved motif

    Haruhiko Siomi;Michael J. Matunis;W. Matthew Michael;Gideon Dreyfuss

  • A nuclear localization domain in the hnRNP A1 protein

    Haruhiko Siomi;Gideon Dreyfuss

  • PIWI-Interacting RNA: Its Biogenesis and Functions

    Yuka W. Iwasaki;Mikiko C. Siomi;Haruhiko Siomi

  • Essential role for KH domains in RNA binding: impaired RNA binding by a mutation in the KH domain of FMR1 that causes fragile X syndrome.

    Haruhiko Siomi;Mleyoung Choi;Mikiko C. Siomi;Robert L. Nussbaum

  • Drosophila endogenous small RNAs bind to Argonaute 2 in somatic cells

    Yoshinori Kawamura;Kuniaki Saito;Kuniaki Saito;Taishin Kin;Yukiteru Ono

  • Processing of Pre-microRNAs by the Dicer-1–Loquacious Complex in Drosophila Cells

    Kuniaki Saito;Akira Ishizuka;Haruhiko Siomi;Mikiko C Siomi

  • Pimet, the Drosophila homolog of HEN1, mediates 2′-O-methylation of Piwi- interacting RNAs at their 3′ ends

    Kuniaki Saito;Yuriko Sakaguchi;Takeo Suzuki;Tsutomu Suzuki

  • Slicer function of Drosophila Argonautes and its involvement in RISC formation

    Keita Miyoshi;Hiroko Tsukumo;Tomoko Nagami;Haruhiko Siomi

  • A regulatory circuit for piwi by the large Maf gene traffic jam in Drosophila

    Kuniaki Saito;Sachi Inagaki;Toutai Mituyama;Yoshinori Kawamura;Yoshinori Kawamura

  • Biology of PIWI-interacting RNAs: new insights into biogenesis and function inside and outside of germlines

    Hirotsugu Ishizu;Haruhiko Siomi;Mikiko C. Siomi;Mikiko C. Siomi

  • Structure and function of Zucchini endoribonuclease in piRNA biogenesis

    Hiroshi Nishimasu;Hirotsugu Ishizu;Hirotsugu Ishizu;Kuniaki Saito;Satoshi Fukuhara

  • Roles for the Yb body components Armitage and Yb in primary piRNA biogenesis in Drosophila

    Kuniaki Saito;Hirotsugu Ishizu;Miharu Komai;Hazuki Kotani

Frequent Co-Authors

Mikiko C. Siomi
Mikiko C. Siomi University of Tokyo
Masakazu Hatanaka
Masakazu Hatanaka Kyoto University
Gideon Dreyfuss
Gideon Dreyfuss University of Pennsylvania
Masatoshi Maki
Masatoshi Maki Nagoya University
Hiroshi Nishimasu
Hiroshi Nishimasu University of Tokyo
Satoshi Kubota
Satoshi Kubota Okayama University
Hisataka Sabe
Hisataka Sabe Hokkaido University
Osamu Nureki
Osamu Nureki University of Tokyo
Norio Ishida
Norio Ishida National Institute of Advanced Industrial Science and Technology

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