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Ikumi Tamai

D-Index & Metrics

Biology and Biochemistry

D-Index
91
Citations
29560
World Ranking
2324
National Ranking
141

Ikumi Tamai 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 Ikumi Tamai 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: 437 publications — 92nd percentile

92% of scientists in this discipline score the same or lower.

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

Ikumi Tamai 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 Ikumi Tamai 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: 91 D-Index — 88th percentile

88% of scientists in this discipline score the same or lower.

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

Overview

Ikumi Tamai is affiliated with Kanazawa University in Japan and has contributed extensively to the fields of medicine and biochemistry, genetics, and molecular biology. Their research portfolio covers a wide range of biomedical topics, with a particular focus on drug transport and resistance mechanisms.

Their main fields of study include:

  • Medicine
  • Biochemistry, Genetics and Molecular Biology

Within these broader areas, Ikumi Tamai has conducted research across several subfields, including:

  • Oncology
  • Molecular Biology
  • Physiology
  • Pediatrics, Perinatology and Child Health
  • Surgery

The topics that often appear in their work are:

  • Drug Transport and Resistance Mechanisms
  • Gout, Hyperuricemia, Uric Acid
  • Pharmacological Effects and Toxicity Studies
  • Drug Solubility and Delivery Systems
  • Gastrointestinal motility and disorders
  • MicroRNA in disease regulation
  • Calcium signaling and nucleotide metabolism

Ikumi Tamai has published papers in several recurring venues, including:

  • Drug Metabolism and Pharmacokinetics
  • Journal of Pharmaceutical Sciences
  • Drug Metabolism and Disposition
  • Biological and Pharmaceutical Bulletin
  • Pharmaceutical Research

Some of the recent papers associated with their research are:

  • "Uric acid in health and disease: From physiological functions to pathogenic mechanisms" (2024), Pharmacology & Therapeutics
  • "3CL Protease Inhibitors with an Electrophilic Arylketone Moiety as Anti-SARS-CoV-2 Agents" (2021), Journal of Medicinal Chemistry
  • "ABCG2 requires a single aromatic amino acid to 'clamp' substrates and inhibitors into the binding pocket" (2020), The FASEB Journal
  • "Renal Reabsorptive Transport of Uric Acid Precursor Xanthine by URAT1 and GLUT9" (2020), Biological and Pharmaceutical Bulletin
  • "Uptake Pathway of Apple-derived Nanoparticle by Intestinal Cells to Deliver its Cargo" (2021), Pharmaceutical Research

The scientist frequently collaborates with other researchers, including:

  • Yoshiyuki Shirasaka
  • Hiroshi Arakawa
  • Takeo Nakanishi
  • Qiunan Zhu
  • Masato Kobayashi

Best Publications

  • Molecular and functional identification of sodium ion-dependent, high affinity human carnitine transporter OCTN2.

    Ikumi Tamai;Rikiya Ohashi;Jun-ichi Nezu;Hikaru Yabuuchi

  • Molecular identification and characterization of novel members of the human organic anion transporter (OATP) family.

    Ikumi Tamai;Jun-ichi Nezu;Hiroshi Uchino;Yoshimichi Sai

  • Cloning and characterization of a novel human pH-dependent organic cation transporter, OCTN1

    Ikumi Tamai;Hikaru Yabuuchi;Jun Ichi Nezu;Yoshimichi Sai

  • Primary systemic carnitine deficiency is caused by mutations in a gene encoding sodium ion-dependent carnitine transporter

    Jun-ichi Nezu;Ikumi Tamai;Asuka Oku;Rikiya Ohashi

  • Involvement of human organic anion transporting polypeptide OATP-B (SLC21A9) in pH-dependent transport across intestinal apical membrane

    Daisuke Kobayashi;Takashi Nozawa;Kozue Imai;Jun Ichi Nezu

  • Transporter-mediated permeation of drugs across the blood-brain barrier

    Ikumi Tamai;Akira Tsuji

  • Functional Characterization of pH-Sensitive Organic Anion Transporting Polypeptide OATP-B in Human

    Takashi Nozawa;Kozue Imai;Jun Ichi Nezu;Akira Tsuji

  • Genetic polymorphisms of human organic anion transporters OATP-C (SLC21A6) and OATP-B (SLC21A9): allele frequencies in the Japanese population and functional analysis.

    Takashi Nozawa;Miki Nakajima;Ikumi Tamai;Kumiko Noda

  • Novel membrane transporter OCTN1 mediates multispecific, bidirectional, and pH-dependent transport of organic cations.

    Hikaru Yabuuchi;Ikumi Tamai;Jun-Ichi Nezu;Kazuki Sakamoto

  • Role of organic anion transporter OATP1B1 (OATP-C) in hepatic uptake of irinotecan and its active metabolite, 7-ethyl-10-hydroxycamptothecin : in vitro evidence and effect of single nucleotide polymorphisms

    Takashi Nozawa;Hironobu Minami;Shigeki Sugiura;Akira Tsuji

  • Molecular and functional characterization of organic cation/carnitine transporter family in mice.

    Ikumi Tamai;Rikiya Ohashi;Jun-ichi Nezu;Yoshimichi Sai

  • Identification of MRP2 as a targetable factor limiting oxaliplatin accumulation and response in gastrointestinal cancer.

    Khine Myint;Riya Biswas;Yan Li;Nancy Jong

  • SGLT2 inhibitor lowers serum uric acid through alteration of uric acid transport activity in renal tubule by increased glycosuria

    Yukihiro Chino;Yukihiro Chino;Yoshishige Samukawa;Soichi Sakai;Yasuhiro Nakai

  • P-glycoprotein as the drug efflux pump in primary cultured bovine brain capillary endothelial cells.

    Akira Tsuji;Tetsuya Terasaki;Yasushi Takabatake;Yoshiyuki Tenda

  • Na(+)-dependent carnitine transport by organic cation transporter (OCTN2): its pharmacological and toxicological relevance.

    Rikiya Ohashi;Ikumi Tamai;Hikaru Yabuuchi;Jun-Ichi Nezu

  • Active Secretion of Drugs from the Small Intestinal Epithelium in Rats by P-Glycoprotein Functioning as an Absorption Barrier

    Toshimitsu Terao;Etsuko Hisanaga;Yoshimichi Sai;Ikumi Tamai

  • Functional characterization of human organic anion transporting polypeptide B (OATP-B) in comparison with liver-specific OATP-C.

    Ikumi Tamai;Takashi Nozawa;Minako Koshida;Jun-ichi Nezu

  • Direct evidence for peptide transporter (PepT1)-mediated uptake of a nonpeptide prodrug, valacyclovir.

    Praveen V. Balimane;Ikumi Tamai;Ailan Guo;Takeo Nakanishi

  • Cellular and molecular mechanisms of dietary regulation on rat intestinal H+/peptide transporter PepT1☆☆☆★

    Toshiyuki Shiraga;Ken-Ichi Miyamoto;Hiroko Tanaka;Hironori Yamamoto

  • Function and expression of multidrug resistance-associated protein family in human colon adenocarcinoma cells (Caco-2).

    Tomoko Hirohashi;Hiroshi Suzuki;Xiao-Yan Chu;Ikumi Tamai

Frequent Co-Authors

Tetsuya Terasaki
Tetsuya Terasaki Tohoku University
Haruhiro Higashida
Haruhiro Higashida Kanazawa University
Naoki Ishiguro
Naoki Ishiguro Nagoya University
Eiji Takeda
Eiji Takeda University of Tokushima
Ken-ichi Hosoya
Ken-ichi Hosoya University of Toyama
Miki Nakajima
Miki Nakajima Kanazawa University
Hiroshi Suzuki
Hiroshi Suzuki Obihiro University of Agriculture and Veterinary Medicine
Masanori Tachikawa
Masanori Tachikawa University of Tokushima
Naohiko Anzai
Naohiko Anzai Chiba University
Mitsuru Akashi
Mitsuru Akashi Osaka University

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