World's Best Scientists 2026 revealed!
Masayasu Kojima

Masayasu Kojima

D-Index & Metrics

Medicine

D-Index
96
Citations
65332
World Ranking
9454
National Ranking
254

Masayasu Kojima publication distribution in Medicine in 2026

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

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 264 publications — 10th percentile

10% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Masayasu Kojima D-index placement in Medicine in 2026

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

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 96 D-Index — 53rd percentile

53% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

Masayasu Kojima is affiliated with Kurume University in Japan. The research mainly spans the fields of Neuroscience and Medicine, with a focus on subfields such as Endocrine and Autonomic Systems, Physiology, Nutrition and Dietetics, Cellular and Molecular Neuroscience, and Molecular Biology.

The scientist's research topics encompass:

  • Regulation of Appetite and Obesity
  • Biochemical Analysis and Sensing Techniques
  • Adipose Tissue and Metabolism
  • Diet, Metabolism, and Disease
  • Lipid Metabolism and Biosynthesis
  • Neuropeptides and Animal Physiology
  • Receptor Mechanisms and Signaling

Recent publications include key studies such as:

  • "Structure of an antagonist-bound ghrelin receptor reveals possible ghrelin recognition mode," 2020, Nature Communications
  • "The polyol pathway is an evolutionarily conserved system for sensing glucose uptake," 2022, PLoS Biology
  • "Insights Into the Regulation of Offspring Growth by Maternally Derived Ghrelin," 2022, Frontiers in Endocrinology
  • "Thermoregulatory role of ghrelin in the induction of torpor under a restricted feeding condition," 2021, Scientific Reports
  • "Dysregulation of ghrelin in diabetes impairs the vascular reparative response to hindlimb ischemia in a mouse model; clinical relevance to peripheral artery disease," 2020, Scientific Reports

The most frequent publication venues for Kojima's work include:

  • Frontiers in Endocrinology (4 publications)
  • Scientific Reports (3 publications)
  • bioRxiv (Cold Spring Harbor Laboratory) (2 publications)
  • Nature Communications (1 publication)
  • PLoS Biology (1 publication)

Kojima collaborates regularly with several researchers, including:

  • Takahiro Sato (9 coauthored papers)
  • Yuki Shiimura (6 coauthored papers)
  • Takanori Ida (5 coauthored papers)
  • Hiroko Sano (3 coauthored papers)
  • Akira Nakamura (3 coauthored papers)

Best Publications

  • Ghrelin is a growth-hormone-releasing acylated peptide from stomach.

    Masayasu Kojima;Hiroshi Hosoda;Yukari Date;Masamitsu Nakazato

  • A role for ghrelin in the central regulation of feeding.

    Masamitsu Nakazato;Noboru Murakami;Yukari Date;Masayasu Kojima

  • Ghrelin: Structure and Function

    Masayasu Kojima;Kenji Kangawa

  • Ghrelin, a novel growth hormone-releasing acylated peptide, is synthesized in a distinct endocrine cell type in the gastrointestinal tracts of rats and humans.

    Yukari Date;Masayasu Kojima;Hiroshi Hosoda;Akira Sawaguchi

  • Upregulation of Ghrelin expression in the stomach upon fasting, insulin-induced hypoglycemia, and leptin administration.

    Koji Toshinai;Muhtashan S. Mondal;Masamitsu Nakazato;Yukari Date

  • Primary structure of the receptor for calcium channel blockers from skeletal muscle

    Tsutomu Tanabe;Hiroshi Takeshima;Atsushi Mikami;Veit Flockerzi

  • Stomach Is a Major Source of Circulating Ghrelin, and Feeding State Determines Plasma Ghrelin-Like Immunoreactivity Levels in Humans

    Hiroyuki Ariyasu;Kazuhiko Takaya;Tetsuya Tagami;Yoshihiro Ogawa

  • Ghrelin Strongly Stimulates Growth Hormone Release in Humans

    Kazuhiko Takaya;Hiroyuki Ariyasu;Naotetsu Kanamoto;Hiroshi Iwakura

  • Ghrelin and des-acyl ghrelin: two major forms of rat ghrelin peptide in gastrointestinal tissue.

    Hiroshi Hosoda;Masayasu Kojima;Hisayuki Matsuo;Kenji Kangawa

  • Ghrelin, an Endogenous Growth Hormone Secretagogue, Is a Novel Orexigenic Peptide That Antagonizes Leptin Action Through the Activation of Hypothalamic Neuropeptide Y/Y1 Receptor Pathway

    Mitsuyo Shintani;Yoshihiro Ogawa;Ken Ebihara;Megumi Aizawa-Abe

  • Ghrelin stimulates gastric acid secretion and motility in rats.

    Yutaka Masuda;Tsuguhiko Tanaka;Norio Inomata;Norio Ohnuma

  • Cloning, sequencing and expression of complementary DNA encoding the muscarinic acetylcholine receptor

    Tai Kubo;Kazuhiko Fukuda;Atsushi Mikami;Akito Maeda

  • Cloning and characterization of cDNA encoding a precursor for human adrenomedullin.

    K. Kitamura;J. Sakata;K. Kangawa;M. Kojima

  • Ghrelin is present in pancreatic α-cells of humans and rats and stimulates insulin secretion

    Yukari Date;Masamitsu Nakazato;Suzuko Hashiguchi;Katsuya Dezaki

  • Hemodynamic and hormonal effects of human ghrelin in healthy volunteers

    Noritoshi Nagaya;Masayasu Kojima;Masaaki Uematsu;Masakazu Yamagishi

  • Ghrelin, A New Gastrointestinal Endocrine Peptide that Stimulates Insulin Secretion: Enteric Distribution, Ontogeny, Influence of Endocrine, and Dietary Manipulations

    Heung-Man Lee;Guiyun Wang;Ella W. Englander;Masayasu Kojima

  • Ghrelin: discovery of the natural endogenous ligand for the growth hormone secretagogue receptor

    Masayasu Kojima;Hiroshi Hosoda;Hisayuki Matsuo;Kenji Kangawa

  • Chronic administration of ghrelin improves left ventricular dysfunction and attenuates development of cardiac cachexia in rats with heart failure

    Noritoshi Nagaya;Masaaki Uematsu;Masayasu Kojima;Yoshihiko Ikeda

  • Weight loss increases circulating levels of ghrelin in human obesity.

    Troels Krarup Hansen;Rolf Dall;Hiroshi Hosoda;Masayasu Kojima

  • Ghrelin, a novel placental-derived hormone.

    O Gualillo;J Caminos;M Blanco;T Garcìa-Caballero

Frequent Co-Authors

Kenji Kangawa
Kenji Kangawa National Cerebral and Cardiovascular Center
Hiroshi Hosoda
Hiroshi Hosoda Shinshu University
Hisayuki Matsuo
Hisayuki Matsuo Osaka University
Masamitsu Nakazato
Masamitsu Nakazato University of Miyazaki
Kazuwa Nakao
Kazuwa Nakao Kyoto University
Kensaku Mizuno
Kensaku Mizuno Tohoku University
Noritoshi Nagaya
Noritoshi Nagaya National Archives and Records Administration
Kazuhiko Kume
Kazuhiko Kume Nagoya City University
Kiminori Hosoda
Kiminori Hosoda Kyoto University
Yoshihiro Ogawa
Yoshihiro Ogawa Kyushu University

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

If you’re interested in Medicine in the USA but want to explore alternative healthcare careers or flexible study options, there are many respected online degree pathways to consider. These programs can help you enter the healthcare workforce faster or work in essential support roles.

Non-clinical career options, like working in medical offices or insurance, begin with programs such as accredited medical billing and coding schools with financial aid. These online programs are ideal for those who want to quickly start a healthcare career without years of training.

For those pursuing hands-on nursing roles, there are now nursing schools that don’t require teas or other entrance exams. This makes it easier for prospective nurses to access quality education and start serving patients sooner.

If you aspire to leadership or administrative roles, online health administration programs offer flexible, accelerated options for building management skills in hospital and clinic settings.

Already a registered nurse? Consider rn to np programs that bridge your current credentials to advanced practice, opening the door to high-demand nurse practitioner roles.

Best Scientists Citing Masayasu Kojima

Trending Scientists

Recently Published Articles