2026 Ko Okumura: Immunology Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Immunology	146	136	126	9	9	1019	78356
Medicine	147	1291	1193	23	22	1042	78948

Research.com Recognitions

2026 - Research.com Immunology in Japan Leader Award
2025 - Research.com Immunology in Japan Leader Award
2023 - Research.com Immunology in Japan Leader Award
2023 - Research.com Medicine in Japan Leader Award
2022 - Research.com Immunology in Japan Leader Award

Overview

Ko Okumura is affiliated with Juntendo University in Japan and conducts research primarily in the fields of Medicine and Immunology and Microbiology. Their work spans several subfields, including Immunology, Dermatology, Immunology and Allergy, Molecular Biology, and Physiology.

The scientist's main topics of research cover Dermatology and Skin Diseases, Asthma and respiratory diseases, Allergic Rhinitis and Sensitization, IL-33, ST2, and ILC Pathways, Immune Cell Function and Interaction, Food Allergy and Anaphylaxis Research, and Mast cells and histamine.

Ko Okumura has published extensively, with frequent appearances in the following scientific venues:

International Journal of Molecular Sciences
Journal of Investigative Dermatology
Scientific Reports
Biochemical and Biophysical Research Communications
Frontiers in Immunology

Some recent papers illustrating their research topics include:

Role of Antimicrobial Peptides in Skin Barrier Repair in Individuals with Atopic Dermatitis, 2020, International Journal of Molecular Sciences
The Antimicrobial Peptide Human β-Defensin-3 Accelerates Wound Healing by Promoting Angiogenesis, Cell Migration, and Proliferation Through the FGFR/JAK2/STAT3 Signaling Pathway, 2021, Frontiers in Immunology
Human β-defensin-3 attenuates atopic dermatitis-like inflammation through autophagy activation and the aryl hydrocarbon receptor signaling pathway, 2022, Journal of Clinical Investigation
Fibroblast growth factor 18 stimulates the proliferation of hepatic stellate cells, thereby inducing liver fibrosis, 2023, Nature Communications
The Multifaceted Role of Plasminogen in Cancer, 2021, International Journal of Molecular Sciences

Frequent collaboration partners include:

Hideoki Ogawa
François Niyonsaba
Ge Peng
Shigaku Ikeda
Kazuyoshi Takeda

Best Publications

Evidence for oscillation of atmospheric neutrinos

Y. Fukuda;T. Hayakawa;E. Ichihara;K. Inoue

8570
Citations
Measurement of atmospheric neutrino oscillation parameters by Super-Kamiokande I

Y. Ashie;J. Hosaka;K. Ishihara;Y. Itow

1518
Citations
Measurement of neutrino oscillation by the K2K experiment

M. H. Ahn;E. Aliu;S. Andringa;S. Aoki

1480
Citations
Solar Neutrino Data Covering Solar Cycle 22.

Y. Fukuda;T. Hayakawa;K. Inoue;K. Ishihara

1377
Citations
Expression of Programmed Death 1 Ligands by Murine T Cells and APC

Tomohide Yamazaki;Hisaya Akiba;Hideyuki Iwai;Hironori Matsuda

1367
Citations
Measurement of the Flux and Zenith-Angle Distribution of Upward Throughgoing Muons by Super-Kamiokande

Y. Fukuda;T. Hayakawa;E. Ichihara;K. Inoue

1313
Citations
Measurements of the solar neutrino flux from Super-Kamiokande's first 300 days

Y. Fukuda;T. Hayakawa;E. Ichihara;K. Inoue

1293
Citations
Tau neutrinos favored over sterile neutrinos in atmospheric muon neutrino oscillations.

S. Fukuda;Y. Fukuda;M. Ishitsuka;Y. Itow

1163
Citations
Evidence for an Oscillatory Signature in Atmospheric Neutrino Oscillations

Y. Ashie;J. Hosaka;K. Ishihara;Y. Itow

1084
Citations
Measurement of a small atmospheric νμ/νe ratio

Y. Fukuda;T. Hayakawa;E. Ichihara;K. Inoue

1080
Citations
Study of the atmospheric neutrino flux in the multi-GeV energy range

Y. Fukuda;T. Hayakawa;E. Ichihara;K. Inoue

1045
Citations
Involvement of tumor necrosis factor-related apoptosis-inducing ligand in surveillance of tumor metastasis by liver natural killer cells.

Kazuyoshi Takeda;Yoshihiro Hayakawa;Mark J. Smyth;Nobuhiko Kayagaki

973
Citations
A glycolipid on the surface of mouse natural killer cells

M Kasai;M Iwamori;Y Nagai;K Okumura

794
Citations
IL-33 is a crucial amplifier of innate rather than acquired immunity

Keisuke Oboki;Tatsukuni Ohno;Naoki Kajiwara;Ken Arae

768
Citations
Solar neutrino measurements in Super-Kamiokande-II

J. P. Cravens;K. Abe;T. Iida;K. Ishihara

732
Citations
Antimicrobial Peptides Human β-Defensins Stimulate Epidermal Keratinocyte Migration, Proliferation and Production of Proinflammatory Cytokines and Chemokines

François Niyonsaba;Hiroko Ushio;Nobuhiro Nakano;William Ng

720
Citations
Evidence for Muon Neutrino Oscillation in an Accelerator-Based Experiment

E. Aliu;S. Andringa;S. Aoki;J. Argyriades

718
Citations
Type I Interferons (IFNs) Regulate Tumor Necrosis Factor–related Apoptosis-inducing Ligand (TRAIL) Expression on Human T Cells: A Novel Mechanism for the Antitumor Effects of Type I IFNs

Nobuhiko Kayagaki;Noriko Yamaguchi;Masafumi Nakayama;Hiroshi Eto

709
Citations
Differential responses of mast cell Toll-like receptors 2 and 4 in allergy and innate immunity

Volaluck Supajatura;Hiroko Ushio;Atsuhito Nakao;Shizuo Akira

672
Citations
Differential regulation of IκB kinase α and β by two upstream kinases, NF-κB-inducing kinase and mitogen-activated protein kinase/ERK kinase kinase-1

Hiroyasu Nakano;Masahisa Shindo;Sachiko Sakon;Shigeyuki Nishinaka

666
Citations

Frequent Co-Authors

Hideo Yagita Juntendo University

Hideoki Ogawa Juntendo University

E. Kearns Boston University

Kate Scholberg Duke University

Y. Hayato University of Tokyo

Takaaki Kajita University of Tokyo

C. K. Jung Stony Brook University

C. W. Walter Duke University

S. Mine University of California, Irvine

S. Moriyama University of Tokyo

External Links

Personal website of Ko Okumura

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