World's Best Scientists 2026 revealed!
Koichi Ikuta

Koichi Ikuta

D-Index & Metrics

Microbiology

D-Index
65
Citations
19383
World Ranking
2476
National Ranking
86

Koichi Ikuta publication distribution in Microbiology in 2026

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

55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 264 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 233 scientists 205–214 publications: 207 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55 publications 679+

This scientist: 162 publications — 32nd percentile

32% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

Koichi Ikuta D-index placement in Microbiology in 2026

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

40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 111 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 122 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 93 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 65 D-Index — 55th percentile

55% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

Overview

Koichi Ikuta is affiliated with Kyoto University in Japan and specializes primarily in the fields of immunology and microbiology, with additional work in medicine. Their research encompasses several subfields, including immunology, physiology, surgery, endocrine and autonomic systems, and molecular biology.

Their work covers a range of topics centered on immune cell function and interaction, IL-33, ST2, and ILC pathways, T-cell and B-cell immunology, eosinophilic esophagitis, asthma and respiratory diseases, circadian rhythm and melatonin, as well as immune response and inflammation.

Frequent coauthors collaborating with Koichi Ikuta include:

  • Guangwei Cui
  • Akihiro Shimba
  • Shinya Abe
  • Shizue Tani-ichi
  • T. Asahi

Koichi Ikuta has published extensively in several scientific venues. The most frequent journals featuring their work are:

  • The Journal of Immunology
  • Frontiers in Immunology
  • International Immunology
  • Nature Immunology
  • Journal of Allergy and Clinical Immunology

Recent notable papers include the following:

  • "Control of immunity by glucocorticoids in health and disease," 2020, Seminars in Immunopathology
  • "Chronic circadian misalignment accelerates immune senescence and abbreviates lifespan in mice," 2020, Scientific Reports
  • "Cytotoxic innate lymphoid cells sense cancer cell-expressed interleukin-15 to suppress human and murine malignancies," 2022, Nature Immunology
  • "Glucocorticoids Regulate Circadian Rhythm of Innate and Adaptive Immunity," 2020, Frontiers in Immunology
  • "Estradiol suppresses psoriatic inflammation in mice by regulating neutrophil and macrophage functions," 2022, Journal of Allergy and Clinical Immunology

Koichi Ikuta has also contributed to published book works. One identified title is ARDS in COVID-19 - Insights for Treatment, published in 2023 by Frontiers Media.

Best Publications

  • Evidence that hematopoietic stem cells express mouse c-kit but do not depend on steel factor for their generation

    Koichi Ikuta;Irving L. Weissman

  • A developmental switch in thymic lymphocyte maturation potential occurs at the level of hematopoietic stem cells.

    Koichi Ikuta;Tatsuo Kina;Ian MacNeil;Ian MacNeil;Nobuko Uchida

  • Role of cytosolic phospholipase A2 in allergic response and parturition.

    Naonori Uozumi;Kazuhiko Kume;Takahide Nagase;Noriaki Nakatani

  • Inducible gene knockout of transcription factor recombination signal binding protein-J reveals its essential role in T versus B lineage decision

    Hua Han;Kenji Tanigaki;Norio Yamamoto;Kazuki Kuroda

  • STAT5 as a molecular regulator of proliferation, differentiation and apoptosis in hematopoietic cells

    Tetsuya Nosaka;Toshiyuki Kawashima;Kazuhide Misawa;Koichi Ikuta

  • In situ class switching and differentiation to IgA-producing cells in the gut lamina propria

    Sidonia Fagarasan;Kazuo Kinoshita;Masamichi Muramatsu;Koichi Ikuta

  • The monoclonal antibody TER-119 recognizes a molecule associated with glycophorin A and specifically marks the late stages of murine erythroid lineage.

    Tatsuo Kina;Koichi Ikuta;Eiji Takayama;Katsuya Wada

  • Alymphoplasia is caused by a point mutation in the mouse gene encoding Nf-κb-inducing kinase

    Reiko Shinkura;Kazuhiro Kitada;Fumihiko Matsuda;Kei Tashiro

  • Essential Role of IL-17A in the Formation of a Mycobacterial Infection-Induced Granuloma in the Lung

    Yuko Okamoto Yoshida;Masayuki Umemura;Ayano Yahagi;Rebecca L. O’Brien

  • Contribution of IL-17-producing gamma delta T cells to the efficacy of anticancer chemotherapy.

    Yuting Ma;Laetitia Aymeric;Clara Locher;Stephen R Mattarollo

  • IL-17A Produced by γδ T Cells Plays a Critical Role in Innate Immunity against Listeria monocytogenes Infection in the Liver

    Satoru Hamada;Masayuki Umemura;Takeru Shiono;Kensho Tanaka

  • Interleukin 7 receptor-deficient mice lack gammadelta T cells.

    Kazushige Maki;Shinji Sunaga;Yoshinori Komagata;Yuzo Kodaira

  • Functional heterogeneity is associated with the cell cycle status of murine hematopoietic stem cells

    William H. Fleming;Eytan J. Alpern;Nobuko Uchida;Koichi Ikuta

  • B cell ontogeny in murine embryo studied by a culture system with the monolayer of a stromal cell clone, ST2: B cell progenitor develops first in the embryonal body rather than in the yolk sac.

    M. Ogawa;S. Nishikawa;K. Ikuta;F. Yamamura

  • Hair follicle-derived IL-7 and IL-15 mediate skin-resident memory T cell homeostasis and lymphoma.

    Takeya Adachi;Tetsuro Kobayashi;Tetsuro Kobayashi;Eiji Sugihara;Taketo Yamada

  • Contribution of IL-17–producing γδ T cells to the efficacy of anticancer chemotherapy

    Yuting Ma;Yuting Ma;Laetitia Aymeric;Laetitia Aymeric;Clara Locher;Clara Locher;Stephen R. Mattarollo

  • IL-7 receptor α+ CD3– cells in the embryonic intestine induces the organizing center of Peyer's patches

    Hisahiro Yoshida;Kenya Honda;Reiko Shinkura;Satoko Adachi

  • Increased B-lymphopoiesis by interleukin 7 induces bone loss in mice with intact ovarian function: Similarity to estrogen deficiency

    Chisato Miyaura;Yoshiko Onoe;Masaki Inada;Kazushige Maki

  • Defective B-1 Cell Development and Impaired Immunity against Angiostrongylus cantonensis in IL-5Rα-Deficient Mice

    Toshimi Yoshida;Koichi Ikuta;Hiroko Sugaya;Kazushige Maki

  • Impaired Anaphylactic Responses with Intact Sensitivity to Endotoxin in Mice Lacking a Platelet-activating Factor Receptor

    Satoshi Ishii;Tomoyuki Kuwaki;Takahide Nagase;Kazushige Maki

  • Mouse hematopoietic stem cells

    Gerald J. Spangrude;Laurie Smith;Nobuko Uchida;Koichi Ikuta

Frequent Co-Authors

Tasuku Honjo
Tasuku Honjo Kyoto University
Irving L. Weissman
Irving L. Weissman Stanford University
Rebecca L. O'Brien
Rebecca L. O'Brien National Jewish Health
Tsutomu Chiba
Tsutomu Chiba Kyoto University
Takashi Nagasawa
Takashi Nagasawa Osaka University
Willi K. Born
Willi K. Born University of Colorado Anschutz Medical Campus
Kenji Kabashima
Kenji Kabashima Kyoto University
Akira Shimizu
Akira Shimizu Kyoto University
Junji Yodoi
Junji Yodoi Kyoto University

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