World's Best Scientists 2026 revealed!
Hitoshi Okamura

Hitoshi Okamura

D-Index & Metrics

Medicine

D-Index
95
Citations
33938
World Ranking
10058
National Ranking
281

Hitoshi Okamura 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 Hitoshi Okamura 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: 568 publications — 68th percentile

68% of scientists in this discipline score the same or lower.

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

Hitoshi Okamura 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 Hitoshi Okamura 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: 95 D-Index — 51st percentile

51% of scientists in this discipline score the same or lower.

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

Overview

Hitoshi Okamura is affiliated with Kyoto University in Japan and has contributed extensively to the fields of medicine and psychology, with a particular focus on psychiatry, mental health, and clinical psychology. Their academic output spans 39 publications in medicine and 15 in psychology, underlining expertise across both domains.

Their research addresses a variety of subfields including psychiatry and mental health, clinical psychology, general health professions, oncology, and physical therapy, sports therapy and rehabilitation. Prominent topics in their work include grief, bereavement, and mental health; balance, gait, and falls prevention; dementia and cognitive impairment research; maternal and perinatal health interventions; stroke rehabilitation and recovery; childhood cancer survivors' quality of life; and palliative care and end-of-life issues.

Recent papers authored by Okamura cover a range of clinical and psychological topics, such as:

  • "The influence of coping types on post-traumatic growth in patients with primary breast cancer" (2020, Japanese Journal of Clinical Oncology)
  • "Factors associated with facilitating advance care planning based on the theory of planned behaviour" (2021, Japanese Journal of Clinical Oncology)
  • "The Japanese Breast Cancer Society clinical practice guidelines for epidemiology and prevention of breast cancer, 2022 edition" (2023, Breast Cancer)
  • "Effects of Cognitive Dysfunction and Dual Task on Gait Speed and Prefrontal Cortex Activation in Community-Dwelling Older Adults" (2020, Aging Neuropsychology and Cognition)
  • "Changes in motor function and quality of life after surgery in patients with pancreatic cancer" (2020, European Journal of Cancer Care)

Okamura frequently publishes in journals such as Dementia and Geriatric Cognitive Disorders, Japanese Journal of Clinical Oncology, Nursing and Health Sciences, Cureus, and PsycTESTS Dataset. These venues reflect the interdisciplinary nature of their work, bridging clinical oncology, neurological disorders, and psychological health.

Collaboration is a significant aspect of Okamura's research career. Frequent co-authors include Fumiko Kaneko, Kazuya Saita, Yoko Ueno, Tomoyuki Okazaki, and Keita Nakagawa, indicating a network of colleagues with whom Okamura consistently contributes to scholarly work.

Best Publications

  • Control mechanism of the circadian clock for timing of cell division in vivo.

    Takuya Matsuo;Shun Yamaguchi;Shun Yamaguchi;Shigeru Mitsui;Shigeru Mitsui;Aki Emi;Aki Emi

  • Synchronization of cellular clocks in the suprachiasmatic nucleus.

    Shun Yamaguchi;Hiromi Isejima;Hiromi Isejima;Takuya Matsuo;Takuya Matsuo;Ryusuke Okura

  • Circadian oscillation of a mammalian homologue of the Drosophila period gene.

    Hajime Tei;Hitoshi Okamura;Yasufumi Shigeyoshi;Chiaki Fukuhara

  • Light-induced resetting of a mammalian circadian clock is associated with rapid induction of the mPer1 transcript.

    Yasufumi Shigeyoshi;Kouji Taguchi;Shuzo Yamamoto;Seiichi Takekida

  • RNA-Methylation-Dependent RNA Processing Controls the Speed of the Circadian Clock

    Jean-Michel Fustin;Masao Doi;Yoshiaki Yamaguchi;Hayashi Hida

  • Thyroplasty as a new phonosurgical technique.

    N. Isshiki;H. Morita;H. Okamura;M. Hiramoto

  • Light activates the adrenal gland: Timing of gene expression and glucocorticoid release

    Atsushi Ishida;Tatsushi Mutoh;Tomoko Ueyama;Hideki Bando;Hideki Bando

  • microRNA Modulation of Circadian-Clock Period and Entrainment

    Hai Ying M. Cheng;Joseph W. Papp;Olga Varlamova;Heather Dziema

  • Molecular mechanisms of the biological clock in cultured fibroblasts.

    Kazuhiro Yagita;Filippo Tamanini;Gijsbertus T. J. van der Horst;Hitoshi Okamura

  • Photic induction of mPer1 and mPer2 in cry-deficient mice lacking a biological clock.

    Hitoshi Okamura;Shigeru Miyake;Yasuo Sumi;Shun Yamaguchi

  • Synchronization and Maintenance of Timekeeping in Suprachiasmatic Circadian Clock Cells by Neuropeptidergic Signaling

    Elizabeth S. Maywood;Akhilesh B. Reddy;Gabriel K.Y. Wong;John S. O'Neill

  • Antagonistic role of E4BP4 and PAR proteins in the circadian oscillatory mechanism

    Shigeru Mitsui;Shun Yamaguchi;Takuya Matsuo;Yoshiki Ishida

  • Salt-sensitive hypertension in circadian clock-deficient Cry-null mice involves dysregulated adrenal Hsd3b6.

    Masao Doi;Yukari Takahashi;Rie Komatsu;Fumiyoshi Yamazaki

  • FSP27 contributes to efficient energy storage in murine white adipocytes by promoting the formation of unilocular lipid droplets

    Naonobu Nishino;Yoshikazu Tamori;Sanshiro Tateya;Takayuki Kawaguchi

  • Thyroplasty type I (lateral compression) for dysphonia due to vocal cord paralysis or atrophy.

    N Isshiki;H Okamura;T Ishikawa

  • Adrenergic regulation of clock gene expression in mouse liver

    Hideyuki Terazono;Tatsushi Mutoh;Shun Yamaguchi;Masaki Kobayashi

  • Real-time imaging of the somite segmentation clock : revelation of unstable oscillators in the individual presomitic mesoderm cells

    Yoshito Masamizu;Toshiyuki Ohtsuka;Yoshiki Takashima;Hiroki Nagahara

  • Nucleocytoplasmic shuttling and mCRY‐dependent inhibition of ubiquitylation of the mPER2 clock protein

    Kazuhiro Yagita;Filippo Tamanini;Maya Yasuda;Jan H. J. Hoeijmakers

  • Mice Genetically Deficient in Vasopressin V1a and V1b Receptors Are Resistant to Jet Lag

    Yoshiaki Yamaguchi;Toru Suzuki;Yasutaka Mizoro;Hiroshi Kori

  • Role of hepatic STAT3 in brain-insulin action on hepatic glucose production.

    Hiroshi Inoue;Wataru Ogawa;Akihiro Asakawa;Yasuo Okamoto

Frequent Co-Authors

Noboru Yanaihara
Noboru Yanaihara University of Shizuoka
Yasufumi Shigeyoshi
Yasufumi Shigeyoshi Kindai University
Ikuko Nagatsu
Ikuko Nagatsu Fujita Health University
Shingo Fujii
Shingo Fujii Kyoto University
Shigenobu Shibata
Shigenobu Shibata Waseda University
Yasuyuki Yamashita
Yasuyuki Yamashita Kumamoto University
Ikuo Konishi
Ikuo Konishi Kyoto University
Kunio Kitahama
Kunio Kitahama Tokyo Metropolitan Institute of Medical Science
Mutsumasa Takahashi
Mutsumasa Takahashi Kumamoto University
Takahiro Moriya
Takahiro Moriya Tohoku University

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