World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Neuroscience 80 1626 1481 34 32 249 21674
Medicine 80 17183 16150 549 517 260 21847
Biology and Biochemistry 80 4111 3793 272 254 250 21678

Hiroyuki Nawa publications per year

The chart shows the history of publications by Hiroyuki Nawa between 1980 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Hiroyuki Nawa published across 46 years, from 1980 to 2025, averaging 6 papers a year. Output peaked at 22 publications in 2003. 10 of the 274 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1980 to 2025. Vertical axis: number of publications, 0 to 22. Peak 22 publications in 2003. 1980: 1 publication 1981: 0 publications 1982: 0 publications 1983: 4 publications 1984: 2 publications 1985: 0 publications 1986: 3 publications 1987: 0 publications 1988: 2 publications 1989: 0 publications 1990: 3 publications 1991: 1 publication 1992: 2 publications 1993: 6 publications 1994: 5 publications 1995: 3 publications 1996: 3 publications 1997: 3 publications 1998: 7 publications 1999: 10 publications 2000: 7 publications 2001: 12 publications 2002: 15 publications 2003: 22 publications 2004: 10 publications 2005: 8 publications 2006: 12 publications 2007: 10 publications 2008: 8 publications 2009: 11 publications 2010: 15 publications 2011: 12 publications 2012: 5 publications 2013: 9 publications 2014: 7 publications 2015: 7 publications 2016: 2 publications 2017: 6 publications 2018: 4 publications 2019: 8 publications 2020: 7 publications 2021: 5 publications 2022: 5 publications 2023: 2 publications 2024: 4 publications 2025: 6 publications
1980 2025

274 publications in total across all disciplines

View publications per year as a table
Hiroyuki Nawa: publications per year, 1980 to 2025
Year Publications
1980 1
1981 0
1982 0
1983 4
1984 2
1985 0
1986 3
1987 0
1988 2
1989 0
1990 3
1991 1
1992 2
1993 6
1994 5
1995 3
1996 3
1997 3
1998 7
1999 10
2000 7
2001 12
2002 15
2003 22
2004 10
2005 8
2006 12
2007 10
2008 8
2009 11
2010 15
2011 12
2012 5
2013 9
2014 7
2015 7
2016 2
2017 6
2018 4
2019 8
2020 7
2021 5
2022 5
2023 2
2024 4
2025 6
Total 274
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Hiroyuki Nawa 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 Hiroyuki Nawa sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 86 bars. Horizontal axis: publications, 38–47 to 887+. Vertical axis: number of scientists, 0 to 539. Most scientists, 539, have 98–107 publications. The last bar groups every scientist with 887 publications or more. The highlighted bar, 248–257 publications, is where this scientist sits. 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 scientist 868–877 publications: 3 scientists 878–886 publications: 6 scientists 887+ publications: 100 scientists
38–47 publications 887+

This scientist: 249 publications — 74th percentile

74% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Neuroscience scientists by publication count, Research.com 2026 ranking edition. Based on 9,597 ranked scientists.
Publications Scientists This scientist
38–47 18
48–57 79
58–67 193
68–77 323
78–87 406
88–97 452
98–107 539
108–117 505
118–127 522
128–137 469
138–147 456
148–157 459
158–167 397
168–177 383
178–187 350
188–197 302
198–207 306
208–217 262
218–227 242
228–237 220
238–247 203
248–257 174 249
258–267 176
268–277 175
278–287 125
288–297 116
298–307 127
308–317 128
318–327 99
328–337 89
338–347 78
348–357 96
358–367 66
368–377 59
378–387 65
388–397 54
398–407 48
408–417 49
418–427 34
428–437 31
438–447 30
448–457 31
458–467 36
468–477 40
478–487 35
488–497 30
498–507 23
508–517 26
518–527 20
528–537 23
538–547 20
548–557 20
558–567 17
568–577 14
578–587 20
588–597 20
598–607 19
608–617 18
618–627 17
628–637 11
638–647 11
648–657 11
658–667 8
668–677 7
678–687 11
688–697 10
698–707 4
708–717 6
718–727 5
728–737 5
738–747 9
748–757 9
758–767 3
768–777 7
778–787 7
788–797 6
798–807 2
808–817 2
818–827 7
828–837 0
838–847 9
848–857 3
858–867 1
868–877 3
878–886 6
887+ 100
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Hiroyuki Nawa 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 Hiroyuki Nawa sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 68 bars. Horizontal axis: D-Index, 30–31 to 163+. Vertical axis: number of scientists, 0 to 512. Most scientists, 512, have 46–47 D-Index. The last bar groups every scientist with 163 D-Index or more. The highlighted bar, 80–81 D-Index, is where this scientist sits. 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
30–31 D-Index 163+

This scientist: 80 D-Index — 83rd percentile

83% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Neuroscience scientists by D-index, Research.com 2026 ranking edition. Based on 9,597 ranked scientists.
D-Index Scientists This scientist
30–31 42
32–33 172
34–35 296
36–37 435
38–39 459
40–41 456
42–43 467
44–45 478
46–47 512
48–49 435
50–51 425
52–53 418
54–55 392
56–57 357
58–59 334
60–61 328
62–63 260
64–65 278
66–67 239
68–69 250
70–71 210
72–73 200
74–75 189
76–77 170
78–79 146
80–81 113 80
82–83 126
84–85 100
86–87 84
88–89 99
90–91 84
92–93 85
94–95 72
96–97 76
98–99 45
100–101 49
102–103 43
104–105 32
106–107 45
108–109 50
110–111 32
112–113 39
114–115 32
116–117 29
118–119 27
120–121 19
122–123 23
124–125 27
126–127 16
128–129 24
130–131 13
132–133 21
134–135 17
136–137 14
138–139 15
140–141 10
142–143 10
144–145 13
146–147 9
148–149 8
150–151 6
152–153 6
154–155 7
156–157 7
158–159 10
160–161 4
162 8
163+ 100
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Overview

Hiroyuki Nawa is affiliated with Wakayama Medical University in Japan and specializes in neuroscience and medicine. Their research presents a focus on both foundational and applied aspects of brain function and psychiatric disorders, particularly schizophrenia and neuropharmacology.

The scientist has extensively contributed to the fields of cellular and molecular neuroscience, biological psychiatry, molecular biology, cognitive neuroscience, and neurology. These broad research interests encompass the following main topics:

  • Tryptophan and brain disorders
  • Neuroscience and Neuropharmacology Research
  • Neuroendocrine regulation and behavior
  • Receptor Mechanisms and Signaling
  • Stress Responses and Cortisol
  • Neuropeptides and Animal Physiology
  • Neural dynamics and brain function

Recent publications reflect a consistent engagement with contemporary neuropsychiatric research. Notable papers include:

  • "Schizophrenia Animal Modeling with Epidermal Growth Factor and Its Homologs: Their Connections to the Inflammatory Pathway and the Dopamine System" (2023, Biomolecules)
  • "Resting-state dopaminergic cell firing in the ventral tegmental area negatively regulates affiliative social interactions in a developmental animal model of schizophrenia" (2021, Translational Psychiatry)
  • "USP10 Inhibits Aberrant Cytoplasmic Aggregation of TDP-43 by Promoting Stress Granule Clearance" (2022, Molecular and Cellular Biology)
  • "Inter-breeder differences in prepulse inhibition deficits of C57BL/6J mice in a maternal immune activation model" (2021, Neuropsychopharmacology Reports)
  • "ALDH4A1 expression levels are elevated in postmortem brains of patients with schizophrenia and are associated with genetic variants in enzymes related to proline metabolism" (2020, Journal of Psychiatric Research)

Hiroyuki Nawa frequently collaborates with a group of researchers, with the most common co-authors being:

  • Hisaaki Namba
  • Hidekazu Sotoyama
  • Hiroyoshi Inaba
  • Yuriko Iwakura
  • Akiyoshi Kakita

The scientist's work has been published in multiple venues, with repeated contributions to:

  • Neuropsychopharmacology Reports
  • Neurochemical Research
  • Scientific Reports
  • Clinical Neurophysiology
  • bioRxiv (Cold Spring Harbor Laboratory)

Best Publications

  • Molecular characterization of a novel metabotropic glutamate receptor mGluR5 coupled to inositol phosphate/Ca2+ signal transduction.

    T Abe;H Sugihara;H Nawa;R Shigemoto

  • Activation of the TrkB Neurotrophin Receptor Is Induced by Antidepressant Drugs and Is Required for Antidepressant-Induced Behavioral Effects

    Tommi Saarelainen;Panu Hendolin;Guilherme Lucas;Eija Koponen

  • Nucleotide sequences of cloned cDNAs for two types of bovine brain substance P precursor.

    Hiroyuki Nawa;Tadaaki Hirose;Hideaki Takashima;Seiichi Inayama

  • Molecular characterization of a novel retinal metabotropic glutamate receptor mGluR6 with a high agonist selectivity for L-2-amino-4-phosphonobutyrate.

    Y Nakajima;H Iwakabe;C Akazawa;H Nawa

  • Involvement of Brain-Derived Neurotrophic Factor in Spatial Memory Formation and Maintenance in a Radial Arm Maze Test in Rats

    Makoto Mizuno;Kiyofumi Yamada;Ana Olariu;Hiroyuki Nawa

  • Tissue-specific generation of two preprotachykinin mRNAs from one gene by alternative RNA splicing.

    Hiroyuki Nawa;Hirokazu Kotani;Shigetada Nakanishi

  • Brain-Derived Neurotrophic Factor Induces Mammalian Target of Rapamycin-Dependent Local Activation of Translation Machinery and Protein Synthesis in Neuronal Dendrites

    Nobuyuki Takei;Naoko Inamura;Mihoko Kawamura;Hisaaki Namba

  • Abnormal expression of brain-derived neurotrophic factor and its receptor in the corticolimbic system of schizophrenic patients.

    M Takahashi;O Shirakawa;K Toyooka;N Kitamura

  • BDNF PROTEIN MEASURED BY A NOVEL ENZYME IMMUNOASSAY IN NORMAL BRAIN AND AFTER SEIZURE : PARTIAL DISAGREEMENT WITH MRNA LEVELS

    Hiroyuki Nawa;Josette Carnahan;Christine Gall

  • Neuronal differentiation factors/cytokines and synaptic plasticity

    Paul H. Patterson;Hiroyuki Nawa

  • Decreased levels of brain-derived neurotrophic factor in serum of chronic schizophrenic patients.

    Kazuhiko Toyooka;Koue Asama;Yuichiro Watanabe;Tatsuyuki Muratake

  • mTOR signaling and its roles in normal and abnormal brain development

    Nobuyuki Takei;Hiroyuki Nawa

  • Increased L1 Retrotransposition in the Neuronal Genome in Schizophrenia

    Miki Bundo;Manabu Toyoshima;Yohei Okada;Wado Akamatsu

  • Structure and gene organization of bovine neuromedin K precursor.

    Hirokazu Kotani;Minoru Hoshimaru;Hiroyuki Nawa;Shigetada Nakanishi

  • Brain-derived neurotrophic factor promotes differentiation of striatal GABAergic neurons.

    Keiko Mizuno;Josette Carnahan;Hiroyuki Nawa

  • Regional specificity of alterations in NGF, BDNF and NT-3 levels in Alzheimer's disease

    Mako Narisawa-Saito;Koichi Wakabayashi;Shoji Tsuji;Hitoshi Takahashi

  • Cytokine hypothesis of schizophrenia pathogenesis: Evidence from human studies and animal models

    Yuichiro Watanabe;Toshiyuki Someya;Hiroyuki Nawa

  • Tyrosyl Phosphorylation of Shp2 Is Required for Normal ERK Activation in Response to Some, but Not All, Growth Factors

    Toshiyuki Araki;Hiroyuki Nawa;Benjamin G. Neel

  • Intraventricular Administration of Bdnf Increases Neuropeptide Expression in Newborn Rat-Brain

    Hiroyuki Nawa;Mary A. Pelleymounter;Josette Carnahan

  • Involvement of brain-derived neurotrophic factor in early retinal neuropathy of streptozotocin-induced diabetes in rats: therapeutic potential of brain-derived neurotrophic factor for dopaminergic amacrine cells.

    Masaaki Seki;Takayuki Tanaka;Hiroyuki Nawa;Tomoaki Usui

Frequent Co-Authors

Nobuyuki Takei
Nobuyuki Takei Niigata University
Akiyoshi Kakita
Akiyoshi Kakita Niigata University
Hitoshi Takahashi
Hitoshi Takahashi Niigata University
Kiyofumi Yamada
Kiyofumi Yamada Nagoya University
Toshitaka Nabeshima
Toshitaka Nabeshima Meijo University
Paul H. Patterson
Paul H. Patterson California Institute of Technology
Shigetada Nakanishi
Shigetada Nakanishi Kyoto University
Koichi Wakabayashi
Koichi Wakabayashi Hirosaki University
Norio Ozaki
Norio Ozaki Nagoya University
Tadao Arinami
Tadao Arinami University of Tsukuba

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