World's Best Scientists 2026 revealed!
Toshikazu Ushijima

Toshikazu Ushijima

D-Index & Metrics

Genetics

D-Index
88
Citations
25846
World Ranking
1178
National Ranking
45

Medicine

D-Index
88
Citations
26363
World Ranking
13239
National Ranking
391

Toshikazu Ushijima 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 Toshikazu Ushijima 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: 429 publications — 90th percentile

90% of scientists in this discipline score the same or lower.

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

Toshikazu Ushijima 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 Toshikazu Ushijima 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: 88 D-Index — 74th percentile

74% of scientists in this discipline score the same or lower.

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

Overview

Toshikazu Ushijima is affiliated with the National Cancer Centre in Japan and has contributed extensively to the fields of biochemistry, genetics, molecular biology, and medicine. The main focus of their research lies in molecular biology, with significant work related to cancer research, genetics, and pulmonary and respiratory medicine.

Their primary research topics include:

  • Epigenetics and DNA Methylation
  • RNA modifications and cancer
  • Cancer-related gene regulation
  • Helicobacter pylori-related gastroenterology studies
  • Cancer-related molecular mechanisms research
  • Gastric Cancer Management and Outcomes
  • Cancer Genomics and Diagnostics

Ushijima has been published in several frequent venues, including:

  • Cancer Research
  • Journal of Gastroenterology
  • Gastric Cancer
  • Breast Cancer Research and Treatment
  • Neuro-Oncology

They have collaborated regularly with a group of co-authors, often working with Satoshi Yamashita, Naoko Hattori, Hideyuki Takeshima, Yuyu Liu, and Chihiro Takeuchi.

Among Ushijima's most notable recent papers are:

  • "Hereditary diffuse gastric cancer: updated clinical practice guidelines," 2020, The Lancet Oncology
  • "TET repression and increased DNMT activity synergistically induce aberrant DNA methylation," 2020, Journal of Clinical Investigation
  • "Mapping genomic and epigenomic evolution in cancer ecosystems," 2021, Science
  • "Targeting aberrant DNA hypermethylation as a driver of ATL leukemogenesis by using the new oral demethylating agent OR-2100," 2020, Blood
  • "12p gain is predominantly observed in non-germinomatous germ cell tumors and identifies an unfavorable subgroup of central nervous system germ cell tumors," 2021, Neuro-Oncology

Their research contributions span the study of DNA methylation and epigenetic modifications influencing cancer development and progression. This includes investigations into molecular mechanisms underpinning gene regulation in cancer cells and the relationship between infection and gastric diseases.

The body of work spans nearly a hundred publications in biochemistry, genetics, and molecular biology, reflecting sustained engagement with understanding cancer's molecular and cellular foundations.

Best Publications

  • Causal Relationship between the Loss of RUNX3 Expression and Gastric Cancer

    Qing Lin Li;Kosei Ito;Chohei Sakakura;Hiroshi Fukamachi

  • High Levels of Aberrant DNA Methylation in Helicobacter pylori–Infected Gastric Mucosae and its Possible Association with Gastric Cancer Risk

    Takao Maekita;Kazuyuki Nakazawa;Mami Mihara;Takeshi Nakajima

  • Detection and interpretation of altered methylation patterns in cancer cells

    Toshikazu Ushijima

  • The International Human Epigenome Consortium: A Blueprint for Scientific Collaboration and Discovery

    Hendrik G. Stunnenberg;Martin Hirst

  • Inflammatory processes triggered by Helicobacter pylori infection cause aberrant DNA methylation in gastric epithelial cells.

    Tohru Niwa;Tetsuya Tsukamoto;Takeshi Toyoda;Akiko Mori

  • Inflammation-associated cancer development in digestive organs: mechanisms and roles for genetic and epigenetic modulation.

    Tsutomu Chiba;Hiroyuki Marusawa;Toshikazu Ushijima

  • Epigenetic mechanisms of chronic pain

    Giannina Descalzi;Daigo Ikegami;Toshikazu Ushijima;Eric J. Nestler

  • Hereditary Diffuse Gastric Cancer: Updated Clinical Practice Guidelines

    Vanessa R. Blair;Maybelle McLeod;Fátima Carneiro;Daniel G. Coit

  • Focus on gastric cancer.

    Toshikazu Ushijima;Mitsuru Sasako

  • DNA methylation of microRNA genes in gastric mucosae of gastric cancer patients: its possible involvement in the formation of epigenetic field defect.

    Takayuki Ando;Takeichi Yoshida;Shotaro Enomoto;Kiyoshi Asada

  • Chemical genomic screening for methylation-silenced genes in gastric cancer cell lines using 5-aza-2'-deoxycytidine treatment and oligonucleotide microarray.

    Satoshi Yamashita;Yoshimi Tsujino;Kazuki Moriguchi;Masae Tatematsu

  • Silencing of the thrombomodulin gene in human malignant melanoma.

    Junichi Furuta;Atsushi Kaneda;Yoshihiro Umebayashi;Fujio Otsuka

  • Epigenetic field for cancerization.

    Toshikazu Ushijima

  • Establishment of methylation-sensitive–representational difference analysis and isolation of hypo- and hypermethylated genomic fragments in mouse liver tumors

    Toshikazu Ushijima;Keiichirou Morimura;Yoko Hosoya;Hideo Okonogi

  • Hippocampal epigenetic modification at the brain-derived neurotrophic factor gene induced by an enriched environment

    Naoko Kuzumaki;Daigo Ikegami;Rie Tamura;Nana Hareyama

  • RUNX3 Suppresses Gastric Epithelial Cell Growth by Inducing p21WAF1/Cip1 Expression in Cooperation with Transforming Growth Factor β-Activated SMAD

    Xin-Zi Chi;Jeung-Ook Yang;Kwang-Youl Lee;Kosei Ito

  • Accumulation of genetic and epigenetic alterations in normal cells and cancer risk.

    Hideyuki Takeshima;Toshikazu Ushijima

  • Identification of silencing of nine genes in human gastric cancers.

    Atsushi Kaneda;Michio Kaminishi;Kazuyoshi Yanagihara;Takashi Sugimura

  • Silencing of Peroxiredoxin 2 and aberrant methylation of 33 CpG islands in putative promoter regions in human malignant melanomas.

    Junichi Furuta;Yoshimasa Nobeyama;Yoshihiro Umebayashi;Fujio Otsuka

  • A chemical genomic screening for methylation-silenced genes in gastric cancer cell lines using 5-aza-2’-deoxycytidine treatment and oligonucleotide microarray

    Satoshi Yamashita;Kazuki Moriguchi;Yoshimi Tsujino;Masae Tatematsu

Frequent Co-Authors

Takashi Sugimura
Takashi Sugimura National Cancer Centre
Minako Nagao
Minako Nagao National Cancer Research Institute, UK
Masae Tatematsu
Masae Tatematsu Nagoya University
Minoru Narita
Minoru Narita Hoshi University
Michiko Narita
Michiko Narita Tokyo Medical University
Hitoshi Tsuda
Hitoshi Tsuda National Defense Medical College
Hitoshi Katai
Hitoshi Katai Juntendo University
Toshio Sofuni
Toshio Sofuni National Institutes of Health
Keiji Wakabayashi
Keiji Wakabayashi University of Shizuoka
Takuji Gotoda
Takuji Gotoda Nihon University

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