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 59 3960 3627 109 104 475 15282

Kenji Ishii publications per year

The chart shows the history of publications by Kenji Ishii between 1978 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Kenji Ishii published across 48 years, from 1978 to 2025, averaging 11.8 papers a year. Output peaked at 46 publications in 2017. 42 of the 567 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1978 to 2025. Vertical axis: number of publications, 0 to 46. Peak 46 publications in 2017. 1978: 2 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 3 publications 1989: 2 publications 1990: 5 publications 1991: 0 publications 1992: 1 publication 1993: 0 publications 1994: 4 publications 1995: 6 publications 1996: 15 publications 1997: 11 publications 1998: 9 publications 1999: 6 publications 2000: 8 publications 2001: 5 publications 2002: 11 publications 2003: 16 publications 2004: 15 publications 2005: 23 publications 2006: 15 publications 2007: 13 publications 2008: 20 publications 2009: 21 publications 2010: 19 publications 2011: 22 publications 2012: 17 publications 2013: 19 publications 2014: 18 publications 2015: 18 publications 2016: 21 publications 2017: 46 publications 2018: 27 publications 2019: 20 publications 2020: 19 publications 2021: 18 publications 2022: 18 publications 2023: 32 publications 2024: 24 publications 2025: 18 publications
1978 2025

567 publications in total across all disciplines

View publications per year as a table
Kenji Ishii: publications per year, 1978 to 2025
Year Publications
1978 2
1979 0
1980 0
1981 0
1982 0
1983 0
1984 0
1985 0
1986 0
1987 0
1988 3
1989 2
1990 5
1991 0
1992 1
1993 0
1994 4
1995 6
1996 15
1997 11
1998 9
1999 6
2000 8
2001 5
2002 11
2003 16
2004 15
2005 23
2006 15
2007 13
2008 20
2009 21
2010 19
2011 22
2012 17
2013 19
2014 18
2015 18
2016 21
2017 46
2018 27
2019 20
2020 19
2021 18
2022 18
2023 32
2024 24
2025 18
Total 567
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Kenji Ishii 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 Kenji Ishii 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, 468–477 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: 475 publications — 94th percentile

94% 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
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 40 475
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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Kenji Ishii 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 Kenji Ishii 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, 58–59 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: 59 D-Index — 59th percentile

59% 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 59
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
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

Kenji Ishii is affiliated with Nippon Medical School in Japan and has contributed extensively to the field of medicine, with a particular focus on radiology, nuclear medicine, and imaging. Their research spans multiple subfields including psychiatry and mental health, neurology, physiology, and molecular biology.

The scientist's work addresses a range of topics, prominently featuring dementia and cognitive impairment research, Alzheimer's disease research and treatments, and various aspects of medical imaging techniques and applications. Other significant areas of investigation include glioma diagnosis and treatment, advanced MRI techniques, radiomics and machine learning in medical imaging, and advanced neuroimaging techniques and applications.

Kenji Ishii has published papers in several notable venues, with frequent publications in Clinical Nuclear Medicine, Alzheimer's & Dementia, and Annals of Nuclear Medicine. Additional publication venues include Research Square and Neuro-Oncology Advances.

Recent papers highlight a focus on neuroimaging and neurodegenerative diseases. Some examples include:

  • Parenchymal border macrophages regulate the flow dynamics of the cerebrospinal fluid, 2022, Nature
  • Cerebrospinal fluid proteomics define the natural history of autosomal dominant Alzheimer's disease, 2023, Nature Medicine
  • Predicting brain age from functional connectivity in symptomatic and preclinical Alzheimer disease, 2022, NeuroImage
  • Detection of sub-centimeter lesions using digital TOF-PET/CT system combined with Bayesian penalized likelihood reconstruction algorithm, 2020, Annals of Nuclear Medicine
  • Quantitative Evaluation of 18F-Flutemetamol PET in Patients With Cognitive Impairment and Suspected Alzheimer's Disease: A Multicenter Study, 2021, Frontiers in Neurology

Kenji Ishii has collaborated frequently with other researchers, with notable coauthors including Kenji Ishibashi, Kei Wagatsuma, Jun Toyohara, Atsushi Iwata, and Takeshi Ikeuchi.

Best Publications

  • High performance plasma amyloid-β biomarkers for Alzheimer’s disease

    Akinori Nakamura;Naoki Kaneko;Victor L Villemagne;Takashi Kato

  • Brief screening tool for mild cognitive impairment in older Japanese: Validation of the Japanese version of the Montreal Cognitive Assessment

    Yoshinori Fujiwara;Hiroyuki Suzuki;Masashi Yasunaga;Mika Sugiyama

  • Florbetaben PET imaging to detect amyloid beta plaques in Alzheimer's disease: Phase 3 study

    Osama Sabri;Marwan N. Sabbagh;John Seibyl;Henryk Barthel

  • Multimodal imaging of brain reorganization in motor areas of the contralesional hemisphere of well recovered patients after capsular stroke

    Christian Gerloff;Khalaf Bushara;Alexandra Sailer;Eric M. Wassermann

  • Modality-specific frontal and parietal areas for auditory and visual spatial localization in humans.

    Khalafalla O. Bushara;Robert A. Weeks;Kenji Ishii;Maria-Jose Catalan

  • Constraint-induced therapy in stroke: magnetic-stimulation motor maps and cerebral activation.

    George F Wittenberg;Robert Chen;Kenji Ishii;Khalafalla O Bushara

  • Aortic Wall Inflammation Due to Takayasu Arteritis Imaged with 18F-FDG PET Coregistered with Enhanced CT

    Yasushi Kobayashi;Kenji Ishii;Keiichi Oda;Tadashi Nariai

  • A PET study of sequential finger movements of varying length in patients with Parkinson's disease.

    Maria Jose Catalan;Kenji Ishii;Manabu Honda;Ali Samii

  • High performance plasma amyloid-beta biomarkers for Alzheimer's disease

    Akinori Nakamura;Naoki Kaneko;Victor L Villemagne;Takashi Kato

  • Database of normal human cerebral blood flow, cerebral blood volume, cerebral oxygen extraction fraction and cerebral metabolic rate of oxygen measured by positron emission tomography with 15O-labelled carbon dioxide or water, carbon monoxide and oxygen: a multicentre study in Japan

    Hiroshi Ito;Iwao Kanno;Chietsugu Kato;Toshiaki Sasaki

  • Usefulness of L-[methyl-11C] methionine-positron emission tomography as a biological monitoring tool in the treatment of glioma.

    Tadashi Nariai;Yoji Tanaka;Hiroaki Wakimoto;Masaru Aoyagi

  • Role of the Nondominant Hemisphere and Undamaged Area During Word Repetition in Poststroke Aphasics A PET Activation Study

    Masashi Ohyama;Michio Senda;Shin Kitamura;Kenji Ishii

  • Low density of sigma1 receptors in early Alzheimer's disease.

    Masahiro Mishina;Masashi Ohyama;Kenji Ishii;Shin Kitamura

  • Function of sigma1 receptors in Parkinson's disease

    M. Mishina;K. Ishiwata;K. Ishii;S. Kitamura

  • High occupancy of sigma-1 receptors in the human brain after single oral administration of fluvoxamine: a positron emission tomography study using [11C]SA4503.

    Masatomo Ishikawa;Kiichi Ishiwata;Kenji Ishii;Yuichi Kimura

  • Vascular Reserve in Chronic Cerebral Ischemia Measured by the Acetazolamide Challenge Test: Comparison with Positron Emission Tomography

    Tadashi Nariai;Ryuta Suzuki;Kimiyoshi Hirakawa;Taketoshi Maehara

  • Expanding the clinical phenotype of SNCA duplication carriers.

    Kenya Nishioka;Owen A. Ross;Kenji Ishii;Jennifer M. Kachergus

  • Extraction of a plasma time-activity curve from dynamic brain PET images based on independent component analysis

    M. Naganawa;Y. Kimura;K. Ishii;K. Oda

  • Adenosine A2A Receptors Measured with [11C]TMSX PET in the Striata of Parkinson's Disease Patients

    Masahiro Mishina;Kiichi Ishiwata;Mika Naganawa;Yuichi Kimura

  • Inter-rater variability of visual interpretation and comparison with quantitative evaluation of 11C-PiB PET amyloid images of the Japanese Alzheimer’s Disease Neuroimaging Initiative (J-ADNI) multicenter study

    Tomohiko Yamane;Kenji Ishii;Muneyuki Sakata;Yasuhiko Ikari

Frequent Co-Authors

Keiichi Oda
Keiichi Oda Hokkaido University of Science
Kengo Ito
Kengo Ito Nagoya University
Takeshi Iwatsubo
Takeshi Iwatsubo University of Tokyo
Mika Naganawa
Mika Naganawa Yale University
Manabu Mochizuki
Manabu Mochizuki Tokyo Medical and Dental University
Takashi Kato
Takashi Kato Nagoya University
Ryozo Kuwano
Ryozo Kuwano Niigata University
Christopher C. Rowe
Christopher C. Rowe University of Melbourne
Marwan N. Sabbagh
Marwan N. Sabbagh Lou Ruvo Brain Institute
Toru Kita
Toru Kita Kyoto University

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