World's Best Scientists 2026 revealed!
Yasumasa Arai

Yasumasa Arai

D-Index & Metrics

Neuroscience

D-Index
47
Citations
8913
World Ranking
6415
National Ranking
209

Yasumasa Arai publication distribution in Neuroscience in 2026

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

38–47 publications: 18 scientists 48–57 publications: 79 scientists 58–67 publications: 193 scientists 68–77 publications: 323 scientists 78–87 publications: 406 scientists 88–97 publications: 452 scientists 98–107 publications: 539 scientists 108–117 publications: 505 scientists 118–127 publications: 522 scientists 128–137 publications: 469 scientists 138–147 publications: 456 scientists 148–157 publications: 459 scientists 158–167 publications: 397 scientists 168–177 publications: 383 scientists 178–187 publications: 350 scientists 188–197 publications: 302 scientists 198–207 publications: 306 scientists 208–217 publications: 262 scientists 218–227 publications: 242 scientists 228–237 publications: 220 scientists 238–247 publications: 203 scientists 248–257 publications: 174 scientists 258–267 publications: 176 scientists 268–277 publications: 175 scientists 278–287 publications: 125 scientists 288–297 publications: 116 scientists 298–307 publications: 127 scientists 308–317 publications: 128 scientists 318–327 publications: 99 scientists 328–337 publications: 89 scientists 338–347 publications: 78 scientists 348–357 publications: 96 scientists 358–367 publications: 66 scientists 368–377 publications: 59 scientists 378–387 publications: 65 scientists 388–397 publications: 54 scientists 398–407 publications: 48 scientists 408–417 publications: 49 scientists 418–427 publications: 34 scientists 428–437 publications: 31 scientists 438–447 publications: 30 scientists 448–457 publications: 31 scientists 458–467 publications: 36 scientists 468–477 publications: 40 scientists 478–487 publications: 35 scientists 488–497 publications: 30 scientists 498–507 publications: 23 scientists 508–517 publications: 26 scientists 518–527 publications: 20 scientists 528–537 publications: 23 scientists 538–547 publications: 20 scientists 548–557 publications: 20 scientists 558–567 publications: 17 scientists 568–577 publications: 14 scientists 578–587 publications: 20 scientists 588–597 publications: 20 scientists 598–607 publications: 19 scientists 608–617 publications: 18 scientists 618–627 publications: 17 scientists 628–637 publications: 11 scientists 638–647 publications: 11 scientists 648–657 publications: 11 scientists 658–667 publications: 8 scientists 668–677 publications: 7 scientists 678–687 publications: 11 scientists 688–697 publications: 10 scientists 698–707 publications: 4 scientists 708–717 publications: 6 scientists 718–727 publications: 5 scientists 728–737 publications: 5 scientists 738–747 publications: 9 scientists 748–757 publications: 9 scientists 758–767 publications: 3 scientists 768–777 publications: 7 scientists 778–787 publications: 7 scientists 788–797 publications: 6 scientists 798–807 publications: 2 scientists 808–817 publications: 2 scientists 818–827 publications: 7 scientists 828–837 publications: 0 scientists 838–847 publications: 9 scientists 848–857 publications: 3 scientists 858–867 publications: 1 scientists 868–877 publications: 3 scientists 878–886 publications: 6 scientists 887+ publications: 100 scientists
38 publications 887+

This scientist: 199 publications — 62nd percentile

62% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 887 publications or more.

Yasumasa Arai D-index placement in Neuroscience in 2026

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

30–31 D-Index: 42 scientists 32–33 D-Index: 172 scientists 34–35 D-Index: 296 scientists 36–37 D-Index: 435 scientists 38–39 D-Index: 459 scientists 40–41 D-Index: 456 scientists 42–43 D-Index: 467 scientists 44–45 D-Index: 478 scientists 46–47 D-Index: 512 scientists 48–49 D-Index: 435 scientists 50–51 D-Index: 425 scientists 52–53 D-Index: 418 scientists 54–55 D-Index: 392 scientists 56–57 D-Index: 357 scientists 58–59 D-Index: 334 scientists 60–61 D-Index: 328 scientists 62–63 D-Index: 260 scientists 64–65 D-Index: 278 scientists 66–67 D-Index: 239 scientists 68–69 D-Index: 250 scientists 70–71 D-Index: 210 scientists 72–73 D-Index: 200 scientists 74–75 D-Index: 189 scientists 76–77 D-Index: 170 scientists 78–79 D-Index: 146 scientists 80–81 D-Index: 113 scientists 82–83 D-Index: 126 scientists 84–85 D-Index: 100 scientists 86–87 D-Index: 84 scientists 88–89 D-Index: 99 scientists 90–91 D-Index: 84 scientists 92–93 D-Index: 85 scientists 94–95 D-Index: 72 scientists 96–97 D-Index: 76 scientists 98–99 D-Index: 45 scientists 100–101 D-Index: 49 scientists 102–103 D-Index: 43 scientists 104–105 D-Index: 32 scientists 106–107 D-Index: 45 scientists 108–109 D-Index: 50 scientists 110–111 D-Index: 32 scientists 112–113 D-Index: 39 scientists 114–115 D-Index: 32 scientists 116–117 D-Index: 29 scientists 118–119 D-Index: 27 scientists 120–121 D-Index: 19 scientists 122–123 D-Index: 23 scientists 124–125 D-Index: 27 scientists 126–127 D-Index: 16 scientists 128–129 D-Index: 24 scientists 130–131 D-Index: 13 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 17 scientists 136–137 D-Index: 14 scientists 138–139 D-Index: 15 scientists 140–141 D-Index: 10 scientists 142–143 D-Index: 10 scientists 144–145 D-Index: 13 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 8 scientists 150–151 D-Index: 6 scientists 152–153 D-Index: 6 scientists 154–155 D-Index: 7 scientists 156–157 D-Index: 7 scientists 158–159 D-Index: 10 scientists 160–161 D-Index: 4 scientists 162 D-Index: 8 scientists 163+ D-Index: 100 scientists
30 D-Index 163+

This scientist: 47 D-Index — 35th percentile

35% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 163 D-Index or more.

Overview

Yasumasa Arai is affiliated with Juntendo University in Japan and has contributed to research primarily in Medicine and Immunology and Microbiology. Their work spans several subfields including Immunology, Pediatrics, Perinatology and Child Health, Rheumatology, Endocrinology, Diabetes and Metabolism, and Genetics.

Arai's research topics focus on biosimilars and bioanalytical methods, pharmaceutical studies and practices, rheumatoid arthritis research and therapies, adrenal hormones and disorders, chronic lymphocytic leukemia research, neuropeptides and animal physiology, and neuroendocrine regulation and behavior.

Frequent coauthors collaborating with Arai include Masayuki Takanuma, Shinji Tsukahara, Mark C. Genovese, Herbert Kellner, and Rafael Muniz.

Yasumasa Arai has published in various scientific venues, with multiple papers appearing in:

  • RMD Open
  • BMC Pharmacology and Toxicology
  • International Journal of Clinical Pharmacology and Therapeutics
  • Endocrinology
  • Journal of Neuroendocrinology

Selected recent publications include:

  • "Long-term safety, immunogenicity and efficacy comparing FKB327 with the adalimumab reference product in patients with active rheumatoid arthritis: data from randomised double-blind and open-label extension studies," 2020, RMD Open
  • "Comparison of two biosimilarity studies of FKB327 with the adalimumab reference product: randomized phase 1 studies of single-blind, single-dose subcutaneous injection in healthy Japanese male participants," 2022, BMC Pharmacology and Toxicology
  • "Pharmacokinetics, safety, tolerability, and immunogenicity of FKB238, a new biosimilar of bevacizumab, in healthy participants," 2022, International Journal of Clinical Pharmacology and Therapeutics
  • "Sex Difference in Vasoactive Intestinal Polypeptide Neural Projection in the Limbic System of the Mouse Brain," 2025, Endocrinology
  • "A male-dominant cell group expressing calbindin- D28K and androgen receptor in the mouse preoptic area requires postnatal testicular androgens and histone deacetylation," 2025, Journal of Neuroendocrinology

Best Publications

  • Distribution and possible roles of the highly polysialylated neural cell adhesion molecule (NCAM-H) in the developing and adult central nervous system

    Tatsunori Seki;Yasumasa Arai

  • Age-related production of new granule cells in the adult dentate gyrus

    Tatsunori Seki;Yasumasa Arai

  • Expression of highly polysialylated NCAM in the neocortex and piriform cortex of the developing and the adult rat.

    Tatsunori Seki;Yasumasa Arai

  • Sexual dimorphism in 'wiring pattern' in the hypothalamic arcuate nucleus and its modification by neonatal hormonal environment.

    A. Matsumoto;Y. Arai

  • The persistent expression of a highly polysialylated NCAM in the dentate gyrus of the adult rat.

    Tatsunori Seki;Yasumasa Arai

  • Sexual dimorphism in synaptic organization in the amygdala and its dependence on neonatal hormone environment

    Masako Nishizuka;Yasumasa Arai

  • Sexual difference in nuclear volume and its ontogeny in the rat amygdala.

    S. Mizukami;M. Nishizuka;Y. Arai

  • Male-female difference in synaptic organization of the ventromedial nucleus of the hypothalamus in the rat

    Akira Matsumoto;Yasumasa Arai

  • Estrogen and apoptosis in the developing sexually dimorphic preoptic area in female rats

    Yasumasa Arai;Yoshie Sekine;Shizuko Murakami

  • Long-term effects of perinatal exposure to sex steroids and diethylstilbestrol on the reproductive system of male mammals.

    Yasumasa Arai;Takao Mori;Yoshihide Suzuki;Howard A. Bern

  • Sex difference in volume of the ventromedial nucleus of the hypothalamus in the rat.

    Akira Matsumoto;Yasumasa Arai

  • The ontogeny of luteinizing hormone-releasing hormone (LHRH) producing neurons in the chick embryo: possible evidence for migrating LHRH neurons from the olfactory epithelium expressing a highly polysialylated neural cell adhesion molecule.

    Shizuko Murakami;Tatsunori Seki;Katsumi Wakabayashi;Yasumasa Arai

  • Role of septum and preoptic area in regulating masculine and feminine sexual behavior in male rats.

    Yasuhiko Kondo;Akira Shinoda;Korehito Yamanouchi;Yasumasa Arai

  • Neuronal plasticity in the deafferented hypothalamic arcuate nucleus of adult female rats and its enhancement by treatment with estrogen.

    Akira Matsumoto;Yasumasa Arai

  • Organizational action of estrogen on synaptic pattern in the amygdala: implications for sexual differentiation of the brain.

    M. Nishizuka;Y. Arai

  • Temporal and spacial relationships between PSA-NCAM-expressing, newly generated granule cells, and radial glia-like cells in the adult dentate gyrus.

    Tatsunori Seki;Yasumasa Arai

  • Sex differences in the anteroventral periventricular nucleus of the preoptic area and in the related effects of androgen in prenatal rats.

    Hiroyuki Sumida;Masako Nishizuka;Yasuhiko Kano;Yasumasa Arai

  • Synaptogenic effect of estrogen on the hypothalamic arcuate nucleus of the adult female rat.

    A. Matsumoto;Y. Arai

  • Synapse formation of the hypothalamic arcuate nucleus during post-natal development in the female rat and its modification by neonatal estrogen treatment

    Unknown

  • Critical Exposure Time for Androgenization of the Developing Hypothalamus in the Female Rat

    Y. Arai;R. A. Gorski

  • Effect of estrogen of early postnatal development of synaptic formation in the hypothalamic arcuate nucleus of female rats

    Akira Matsumoto;Yasumasa Arai

Frequent Co-Authors

Tatsunori Seki
Tatsunori Seki Tokyo Medical University
Toshikazu Shirai
Toshikazu Shirai Juntendo University
Gail S. Prins
Gail S. Prins University of Illinois at Chicago
Urs Rutishauser
Urs Rutishauser Memorial Sloan Kettering Cancer Center
Kanefusa Kato
Kanefusa Kato Nagoya University
Masaharu Noda
Masaharu Noda National Institute for Basic Biology
Howard A. Bern
Howard A. Bern University of California, Berkeley

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