World's Best Scientists 2026 revealed!
Naoki Okada

Naoki Okada

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Biology and Biochemistry 52 16845 15459 1216 1132 191 7883

Naoki Okada publications per year

The chart shows the history of publications by Naoki Okada between 1990 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Naoki Okada published across 36 years, from 1990 to 2025, averaging 6.6 papers a year. Output peaked at 17 publications in 2008. 13 of the 238 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1990 to 2025. Vertical axis: number of publications, 0 to 17. Peak 17 publications in 2008. 1990: 1 publication 1991: 0 publications 1992: 3 publications 1993: 2 publications 1994: 3 publications 1995: 3 publications 1996: 2 publications 1997: 5 publications 1998: 1 publication 1999: 3 publications 2000: 2 publications 2001: 9 publications 2002: 5 publications 2003: 7 publications 2004: 6 publications 2005: 12 publications 2006: 13 publications 2007: 13 publications 2008: 17 publications 2009: 11 publications 2010: 15 publications 2011: 10 publications 2012: 7 publications 2013: 15 publications 2014: 4 publications 2015: 2 publications 2016: 4 publications 2017: 7 publications 2018: 2 publications 2019: 2 publications 2020: 8 publications 2021: 3 publications 2022: 11 publications 2023: 17 publications 2024: 7 publications 2025: 6 publications
1990 2025

238 publications in total across all disciplines

View publications per year as a table
Naoki Okada: publications per year, 1990 to 2025
Year Publications
1990 1
1991 0
1992 3
1993 2
1994 3
1995 3
1996 2
1997 5
1998 1
1999 3
2000 2
2001 9
2002 5
2003 7
2004 6
2005 12
2006 13
2007 13
2008 17
2009 11
2010 15
2011 10
2012 7
2013 15
2014 4
2015 2
2016 4
2017 7
2018 2
2019 2
2020 8
2021 3
2022 11
2023 17
2024 7
2025 6
Total 238
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Naoki Okada publications per year - data summary

  • Naoki Okada, a Biology and Biochemistry scholar from Osaka University, has 238 publications recorded across 36 years, from 1990 to 2025.
  • The oldest publication on record dates to 1990 and the most recent to 2025.
  • The most productive years are 2008 and 2023, with 17 publications each.
  • The least productive years with any output are 1990 and 1998, with 1 publication each.
  • 1 of the 36 years in the span carries no publications at all (1991).
  • The rate of publication averages 6.6 papers per year over the whole span, or 6.8 per year counting only the 35 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 44 publications, 18% of the career total.
  • Split into equal eras - 1990-2001: 34 publications (2.8 per year); 2002-2013: 131 publications (10.9 per year); 2014-2025: 73 publications (6.1 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Naoki Okada publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Naoki Okada sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 100 bars. Horizontal axis: publications, 47–56 to 1,028+. Vertical axis: number of scientists, 0 to 980. Most scientists, 980, have 127–136 publications. The last bar groups every scientist with 1,028 publications or more. The highlighted bar, 187–196 publications, is where this scientist sits. 47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 413 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 848 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 949 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 840 scientists 207–216 publications: 733 scientists 217–226 publications: 708 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 417 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 196 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 59 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientist 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientist 1,028+ publications: 100 scientists
47–56 publications 1,028+

This scientist: 191 publications — 46th percentile

46% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

View publications distribution as a table
Number of Biology and Biochemistry scientists by publication count, Research.com 2026 ranking edition. Based on 19,587 ranked scientists.
Publications Scientists This scientist
47–56 8
57–66 35
67–76 106
77–86 231
87–96 413
97–106 546
107–116 704
117–126 848
127–136 980
137–146 942
147–156 969
157–166 949
167–176 951
177–186 915
187–196 787 191
197–206 840
207–216 733
217–226 708
227–236 651
237–246 605
247–256 510
257–266 524
267–276 434
277–286 417
287–296 350
297–306 363
307–316 315
317–326 296
327–336 261
337–346 240
347–356 219
357–366 196
367–376 154
377–386 161
387–396 155
397–406 145
407–416 124
417–426 112
427–436 132
437–446 116
447–456 99
457–466 81
467–476 91
477–486 80
487–496 80
497–506 59
507–516 36
517–526 46
527–536 54
537–546 44
547–556 43
557–566 43
567–576 42
577–586 25
587–596 34
597–606 23
607–616 33
617–626 31
627–636 27
637–646 25
647–656 28
657–666 34
667–676 18
677–686 16
687–696 10
697–706 12
707–716 21
717–726 12
727–736 12
737–746 10
747–756 7
757–766 13
767–776 15
777–786 13
787–796 9
797–806 9
807–816 7
817–826 4
827–836 9
837–846 7
847–856 3
857–866 5
867–876 5
877–886 11
887–896 3
897–906 4
907–916 7
917–926 5
927–936 6
937–946 6
947–956 3
957–966 7
967–976 2
977–986 2
987–996 1
997–1,006 5
1,007–1,016 2
1,017–1,026 2
1,027 1
1,028+ 100
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Naoki Okada publication distribution in Biology and Biochemistry in 2026 - data summary

  • The chart plots the publication count of all 19,587 Biology and Biochemistry scientists ranked by Research.com in 2026, grouped into 100 ranges running from 47–56 to 1,028+ publications.
  • Naoki Okada, a Biology and Biochemistry scholar from Osaka University, records 191 publications - the 46th percentile of the discipline.
  • 46% of ranked Biology and Biochemistry scientists score the same or lower than Naoki Okada, and about 54% score higher.
  • The median of the discipline falls in the 197–206 publications range, and Naoki Okada ranks below the median.
  • The most crowded range is 127–136 publications, holding 980 scientists (5% of the field).
  • 77% of the field sits in the lowest quarter of the value range (up to 287–296 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 1,028 publications or more, 100 scientists in all (<1% of the field).

Naoki Okada D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Naoki Okada sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 65 bars. Horizontal axis: D-Index, 40–41 to 167+. Vertical axis: number of scientists, 0 to 1,253. Most scientists, 1,253, have 58–59 D-Index. The last bar groups every scientist with 167 D-Index or more. The highlighted bar, 52–53 D-Index, is where this scientist sits. 40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 316 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 899 scientists 52–53 D-Index: 1,025 scientists 54–55 D-Index: 1,149 scientists 56–57 D-Index: 1,235 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,162 scientists 62–63 D-Index: 1,130 scientists 64–65 D-Index: 1,031 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 714 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 71 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40–41 D-Index 167+

This scientist: 52 D-Index — 16th percentile

16% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

View D-Index distribution as a table
Number of Biology and Biochemistry scientists by D-index, Research.com 2026 ranking edition. Based on 19,587 ranked scientists.
D-Index Scientists This scientist
40–41 80
42–43 183
44–45 316
46–47 504
48–49 718
50–51 899
52–53 1,025 52
54–55 1,149
56–57 1,235
58–59 1,253
60–61 1,162
62–63 1,130
64–65 1,031
66–67 897
68–69 814
70–71 714
72–73 709
74–75 596
76–77 512
78–79 473
80–81 412
82–83 373
84–85 358
86–87 285
88–89 273
90–91 227
92–93 208
94–95 193
96–97 153
98–99 157
100–101 148
102–103 120
104–105 113
106–107 100
108–109 86
110–111 67
112–113 71
114–115 73
116–117 64
118–119 53
120–121 60
122–123 54
124–125 43
126–127 38
128–129 49
130–131 26
132–133 18
134–135 23
136–137 32
138–139 32
140–141 27
142–143 19
144–145 22
146–147 12
148–149 16
150–151 14
152–153 10
154–155 13
156–157 10
158–159 7
160–161 9
162–163 13
164–165 4
166 4
167+ 98
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Naoki Okada D-index placement in Biology and Biochemistry in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 19,587 Biology and Biochemistry scientists ranked by Research.com in 2026, grouped into 65 ranges running from 40–41 to 167+ D-Index.
  • Naoki Okada, a Biology and Biochemistry scholar from Osaka University, records 52 D-Index - the 16th percentile of the discipline.
  • 16% of ranked Biology and Biochemistry scientists score the same or lower than Naoki Okada, and about 84% score higher.
  • The median of the discipline falls in the 64–65 D-Index range, and Naoki Okada ranks below the median.
  • The most crowded range is 58–59 D-Index, holding 1,253 scientists (6% of the field).
  • 71% of the field sits in the lowest quarter of the value range (up to 72–73 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 167 D-Index or more, 98 scientists in all (<1% of the field).

Overview

Naoki Okada is affiliated with Osaka University in Japan and has contributed extensively to medical research, focusing primarily on immunology, oncology, molecular biology, physiology, and pulmonary and respiratory medicine. Their body of work encompasses 76 publications in medicine, with significant contributions to various subfields such as immunology, oncology, molecular biology, physiology, and pulmonary and respiratory medicine.

The main research topics covered by Okada include:

  • Asthma and respiratory diseases
  • Antifungal resistance and susceptibility
  • Respiratory and cough-related research
  • CAR-T cell therapy research
  • Immune cells in cancer
  • Immunotherapy and immune responses
  • Nanowire synthesis and applications

Okada has published research in prominent journals and venues, with frequent publications in:

  • Allergy
  • The Journal of Allergy and Clinical Immunology In Practice
  • International Journal of Molecular Sciences
  • Pharmaceutics
  • Cancer Immunology Immunotherapy

Their most recent papers include:

  • New clinical diagnostic criteria for allergic bronchopulmonary aspergillosis/mycosis and its validation, 2020, Journal of Allergy and Clinical Immunology
  • Hinge and Transmembrane Domains of Chimeric Antigen Receptor Regulate Receptor Expression and Signaling Threshold, 2020, Cells
  • Impact of scFv structure in chimeric antigen receptor on receptor expression efficiency and antigen recognition properties, 2020, Biochemical and Biophysical Research Communications
  • Tetrameric and Hexameric Porphyrin Nanorings: Template Synthesis and Photophysical Properties, 2020, Journal of the American Chemical Society
  • Structure of the Signal Transduction Domain in Second-Generation CAR Regulates the Input Efficiency of CAR Signals, 2021, International Journal of Molecular Sciences

Okada collaborates regularly with several researchers including:

  • Masashi Tachibana
  • Koichiro Asano
  • Tsuyoshi Oguma
  • Katsuyoshi Tomomatsu
  • Zhiqi Xie

Best Publications

  • Clinical study and stability assessment of a novel transcutaneous influenza vaccination using a dissolving microneedle patch.

    Sachiko Hirobe;Hiroaki Azukizawa;Takaaki Hanafusa;Kazuhiko Matsuo

  • Chitosan capsules for colon-specific drug delivery: enhanced localization of 5-aminosalicylic acid in the large intestine accelerates healing of TNBS-induced colitis in rats

    Hideyuki Tozaki;Tomokazu Odoriba;Naoki Okada;Takuya Fujita

  • Modulation of Intestinal P-Glycoprotein Function by Cremophor EL and Other Surfactants by an In Vitro Diffusion Chamber Method Using the Isolated Rat Intestinal Membranes

    Yasushi Shono;Hisayo Nishihara;Yasuyuki Matsuda;Shiori Furukawa

  • Enhanced Permeability of Insulin across the Rat Intestinal Membrane by Various Absorption Enhancers: Their Intestinal Mucosal Toxicity and Absorption‐enhancing Mechanism of n‐Lauryl‐β‐D‐maltopyranoside

    Tomomi Uchiyama;Tetsuo Sugiyama;Ying‐Shu Quan;Atsushi Kotani

  • The effect of surface modification of amorphous silica particles on NLRP3 inflammasome mediated IL-1β production, ROS production and endosomal rupture

    Tomohiro Morishige;Yasuo Yoshioka;Hiroshi Inakura;Aya Tanabe

  • Modulation of intestinal P-glycoprotein function by polyethylene glycols and their derivatives by in vitro transport and in situ absorption studies.

    Qi Shen;Yulian Lin;Takahiro Handa;Masamichi Doi

  • Transcutaneous immunization using a dissolving microneedle array protects against tetanus, diphtheria, malaria, and influenza.

    Kazuhiko Matsuo;Sachiko Hirobe;Yayoi Yokota;Yurika Ayabe

  • A low-invasive and effective transcutaneous immunization system using a novel dissolving microneedle array for soluble and particulate antigens

    Kazuhiko Matsuo;Yayoi Yokota;You Zhai;Ying-Shu Quan

  • Effects of Labrasol and other pharmaceutical excipients on the intestinal transport and absorption of rhodamine123, a P-glycoprotein substrate, in rats.

    Yulian Lin;Yulian Lin;Qi Shen;Hidemasa Katsumi;Naoki Okada

  • Efficient Antigen Gene Transduction Using Arg-Gly-Asp Fiber-Mutant Adenovirus Vectors Can Potentiate Antitumor Vaccine Efficacy and Maturation of Murine Dendritic Cells

    Naoki Okada;Tomomi Saito;Yasushige Masunaga;Yukiko Tsukada

  • Development and clinical study of a self-dissolving microneedle patch for transcutaneous immunization device.

    Sachiko Hirobe;Hiroaki Azukizawa;Kazuhiko Matsuo;You Zhai

  • Titanium dioxide induces different levels of IL-1β production dependent on its particle characteristics through caspase-1 activation mediated by reactive oxygen species and cathepsin B

    Tomohiro Morishige;Yasuo Yoshioka;Aya Tanabe;Xinglei Yao

  • Role of MyD88 and TLR9 in the innate immune response elicited by serotype 5 adenoviral vectors.

    Tomoko Yamaguchi;Kenji Kawabata;Naoya Koizumi;Fuminori Sakurai

  • Effective tumor targeted gene transfer using PEGylated adenovirus vector via systemic administration

    Jian-Qing Gao;Yusuke Eto;Yasuo Yoshioka;Fumiko Sekiguchi

  • Nanoparticles built by self-assembly of amphiphilic γ-PGA can deliver antigens to antigen-presenting cells with high efficiency : A new tumor-vaccine carrier for eliciting effector T cells

    Tomoaki Yoshikawa;Naoki Okada;Atsushi Oda;Keisuke Matsuo

  • Hinge and Transmembrane Domains of Chimeric Antigen Receptor Regulate Receptor Expression and Signaling Threshold.

    Kento Fujiwara;Ayaka Tsunei;Hotaka Kusabuka;Erika Ogaki

  • Efficient gene delivery into dendritic cells by fiber-mutant adenovirus vectors.

    Naoki Okada;Yukiko Tsukada;Shinsaku Nakagawa;Hiroyuki Mizuguchi

  • Performance and characteristics evaluation of a sodium hyaluronate-based microneedle patch for a transcutaneous drug delivery system.

    Yasuhiro Hiraishi;Takeshi Nakagawa;Ying-Shu Quan;Fumio Kamiyama

  • Functional and molecular identification of sodium-coupled dicarboxylate transporters in rat primary cultured cerebrocortical astrocytes and neurons.

    Etsuo Yodoya;Miyuki Wada;Ayumi Shimada;Hiromi Katsukawa

  • A novel strategy utilizing ultrasound for antigen delivery in dendritic cell-based cancer immunotherapy.

    Ryo Suzuki;Yusuke Oda;Naoki Utoguchi;Eisuke Namai

Frequent Co-Authors

Shinsaku Nakagawa
Shinsaku Nakagawa Osaka University
Takuya Fujita
Takuya Fujita Ritsumeikan University
Tadanori Mayumi
Tadanori Mayumi Kobe Gakuin University
Hiroyuki Mizuguchi
Hiroyuki Mizuguchi Osaka University
Takao Hayakawa
Takao Hayakawa National Institutes of Health
Yoshiyuki Ohsugi
Yoshiyuki Ohsugi Roche (Switzerland)
Mitsuru Akashi
Mitsuru Akashi Osaka University
Vadivel Ganapathy
Vadivel Ganapathy Texas Tech University Health Sciences Center
Takashi Nakayama
Takashi Nakayama Kindai University
Jun-ichi Miyazaki
Jun-ichi Miyazaki Osaka University

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