World's Best Scientists 2026 revealed!
Hiroaki Niki

Hiroaki Niki

D-Index & Metrics

Neuroscience

D-Index
33
Citations
6746
World Ranking
9411
National Ranking
350

Hiroaki Niki 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 Hiroaki Niki 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: 66 publications — 3rd percentile

3% of scientists in this discipline score the same or lower.

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

Hiroaki Niki 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 Hiroaki Niki 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: 33 D-Index — 2nd percentile

2% of scientists in this discipline score the same or lower.

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

Overview

Hiroaki Niki is affiliated with the University of Tokyo in Japan. Their academic profile does not list specific research papers, co-authors, publication venues, or books, which limits detailed information about their research contributions and collaborations.

There is also no available data on their main fields of study, subfields, or topics covered by their work. Similarly, information regarding awards or honors is not present.

Despite the limited data on publications and research focus, the association with the University of Tokyo indicates engagement with an academic environment known for diverse scientific disciplines and research activities. This affiliation suggests involvement in the academic community within Japan, contributing to research or teaching at a major institution.

Best Publications

  • Prefrontal cortical unit activity and delayed alternation performance in monkeys.

    Unknown

  • Prefrontal and cingulate unit activity during timing behavior in the monkey.

    Hiroaki Niki;Masataka Watanabe

  • Prefrontal unit activity and delayed response: relation to cue location versus direction of response.

    Hiroaki Niki;Masataka Watanabe

  • Ethanol opens G-protein-activated inwardly rectifying K+ channels

    Toru Kobayashi;Kazutaka Ikeda;Hiroshi Kojima;Hiroaki Niki

  • Fyn-kinase as a determinant of ethanol sensitivity: relation to NMDA-receptor function.

    Tsuyoshi Miyakawa;Takeshi Yagi;Hiromasa Kitazawa;Masahiro Yasuda

  • Targeted disruption of the Epm2a gene causes formation of Lafora inclusion bodies, neurodegeneration, ataxia, myoclonus epilepsy and impaired behavioral response in mice

    Subramaniam Ganesh;Antonio V. Delgado-Escueta;Antonio V. Delgado-Escueta;Toshiro Sakamoto;Maria Rosa Avila

  • Hippocampal unit activity and delayed response in the monkey

    Toshiyuki Watanabe;Hiroaki Niki

  • Hippocampal neurons in the monkey with activity related to the place in which a stimulus is shown

    E. T. Rolls;Y. Miyashita;P. M. B. Cahusac;R. P. Kesner

  • Differential activity of prefrontal units during right and left delayed response trials.

    Hiroaki Niki

  • Prefrontal unit activity during delayed alternation in the monkey. I. Relation to direction of response.

    Hiroaki Niki

  • Encoding of behavioral significance of visual stimuli by primate prefrontal neurons: relation to relevant task conditions

    Masamichi Sakagami;Hiroaki Niki

  • Prefrontal unit activity during delayed alternation in the monkey. II. Relation to absolute versus relative direction of response

    Hiroaki Niki

  • Cingulate unit activity and delayed response.

    Hiroaki Niki;Masataka Watanabe

  • Activity of hippocampal formation neurons in the monkey related to a conditional spatial response task.

    Yasushi Miyashita;Edmund T. Rolls;Peter M. B. Cahusac;Hiroaki Niki

  • Involvement of G-protein-activated inwardly rectifying K (GIRK) channels in opioid-induced analgesia.

    Kazutaka Ikeda;Toru Kobayashi;Toshiro Kumanishi;Hiroaki Niki

  • Molecular mechanisms of analgesia induced by opioids and ethanol: is the GIRK channel one of the keys?

    Kazutaka Ikeda;Toru Kobayashi;Toshiro Kumanishi;Ryoji Yano

  • INCREASED FEARFULNESS OF FYN TYROSINE KINASE DEFICIENT MICE

    Tsuyoshi Miyakawa;Takeshi Yagi;Satoshi Watanabe;Hiroaki Niki

  • Modification of the responses of hippocampal neurons in the monkey during the learning of a conditional spatial response task

    Peter M. B. Cahusac;Edmund T. Rolls;Yasushi Miyashita;Hiroaki Niki

  • Radial maze performance, open-field and elevated plus-maze behaviors in Fyn-kinase deficient mice: Further evidence for increased fearfulness

    Tsuyoshi Miyakawa;Takeshi Yagi;Akira Kagiyama;Hiroaki Niki

  • Delayed alternation performance and unit activity of the caudate head and medial orbitofrontal gyrus in the monkey

    Hiroaki Niki;Masaki Sakai;Kisou Kubota

  • RESPONSE PERSEVERATION FOLLOWING THE HIPPOCAMPAL ABLATION IN THE RAT

    Hiroaki Niki

Frequent Co-Authors

Takeshi Yagi
Takeshi Yagi Osaka University
Tsuyoshi Miyakawa
Tsuyoshi Miyakawa Fujita Health University
Yasushi Miyashita
Yasushi Miyashita Juntendo University
Edmund T. Rolls
Edmund T. Rolls University of Warwick
Raymond P. Kesner
Raymond P. Kesner University of Utah
Ichiro Sora
Ichiro Sora Kobe University
Masayoshi Mishina
Masayoshi Mishina Ritsumeikan University
George R. Uhl
George R. Uhl University of Maryland, Baltimore
Toshihiko Shiroishi
Toshihiko Shiroishi National Institute of Genetics
Kazuo Moriwaki
Kazuo Moriwaki National Institute of Genetics

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Related Online Degrees & Career Pathways

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Best Scientists Citing Hiroaki Niki

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