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Kozo Takayama

Kozo Takayama

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 64 8162 7409 549 513 333 12495

Kozo Takayama publications per year

The chart shows the history of publications by Kozo Takayama between 1977 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Kozo Takayama published across 49 years, from 1977 to 2025, averaging 7.6 papers a year. Output peaked at 21 publications in 2003. 1 of the 372 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1977 to 2025. Vertical axis: number of publications, 0 to 21. Peak 21 publications in 2003. 1977: 3 publications 1978: 2 publications 1979: 1 publication 1980: 1 publication 1981: 1 publication 1982: 4 publications 1983: 1 publication 1984: 3 publications 1985: 2 publications 1986: 0 publications 1987: 2 publications 1988: 2 publications 1989: 3 publications 1990: 3 publications 1991: 2 publications 1992: 9 publications 1993: 6 publications 1994: 8 publications 1995: 12 publications 1996: 12 publications 1997: 13 publications 1998: 18 publications 1999: 16 publications 2000: 15 publications 2001: 12 publications 2002: 13 publications 2003: 21 publications 2004: 8 publications 2005: 11 publications 2006: 18 publications 2007: 10 publications 2008: 11 publications 2009: 16 publications 2010: 16 publications 2011: 9 publications 2012: 12 publications 2013: 13 publications 2014: 13 publications 2015: 7 publications 2016: 11 publications 2017: 13 publications 2018: 7 publications 2019: 5 publications 2020: 2 publications 2021: 3 publications 2022: 0 publications 2023: 1 publication 2024: 0 publications 2025: 1 publication
1977 2025

372 publications in total across all disciplines

View publications per year as a table
Kozo Takayama: publications per year, 1977 to 2025
Year Publications
1977 3
1978 2
1979 1
1980 1
1981 1
1982 4
1983 1
1984 3
1985 2
1986 0
1987 2
1988 2
1989 3
1990 3
1991 2
1992 9
1993 6
1994 8
1995 12
1996 12
1997 13
1998 18
1999 16
2000 15
2001 12
2002 13
2003 21
2004 8
2005 11
2006 18
2007 10
2008 11
2009 16
2010 16
2011 9
2012 12
2013 13
2014 13
2015 7
2016 11
2017 13
2018 7
2019 5
2020 2
2021 3
2022 0
2023 1
2024 0
2025 1
Total 372
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Kozo Takayama publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Kozo Takayama sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 321–340 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 333 publications — 70th percentile

70% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643 333
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Kozo Takayama D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Kozo Takayama sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 64–65 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 64 D-Index — 56th percentile

56% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731 64
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

Kozo Takayama is affiliated with Josai University in Japan and has contributed to research primarily in the field of Medicine, with a focus on Dermatology and Pharmaceutical Science, as well as aspects of Environmental Engineering, Electrical and Electronic Engineering, and sustainability-related topics.

The scientist's research topics include:

  • Advancements in Transdermal Drug Delivery
  • Dermatology and Skin Diseases
  • Contact Dermatitis and Allergies
  • Microbial Fuel Cells and Bioremediation
  • Electrochemical sensors and biosensors
  • Electrocatalysts for Energy Conversion

Takayama has published papers in several scientific venues, with a special focus on interdisciplinary approaches combining pharmaceutical technology and environmental science. Frequent publication venues include:

  • Pharmaceutical Development and Technology
  • Environmental Science & Sustainable Development

Notable recent papers are:

  • Development of invaethosomes and invaflexosomes for dermal delivery of clotrimazole: optimization, characterization and antifungal activity, 2023, Pharmaceutical Development and Technology
  • Evaluation of Glucose-Infused Ceramic Separators in Microbial Fuel Cells, 2025, Environmental Science & Sustainable Development

Throughout their career, Takayama has collaborated frequently with several co-authors, including:

  • Sureewan Duangjit
  • Sureewan Bumrungthai
  • Jongjan Mahadlek
  • Tanasait Ngawhirunpat
  • Praneet Opanasopit

Best Publications

  • Encapsulation of Hydrophilic and Lipophilic Drugs in PLGA Nanoparticles by the Nanoprecipitation Method

    Jose Mario Barichello;Mariko Morishita;Kozo Takayama;Tsuneji Nagai

  • Current challenges in non-invasive insulin delivery systems: a comparative review.

    El-Sayed Khafagy;Mariko Morishita;Yoshinori Onuki;Kozo Takayama

  • Absorption of insulin from pluronic F-127 gels following subcutaneous administration in rats.

    Jose Mario Barichello;Mariko Morishita;Kozo Takayama;Tsuneji Nagai

  • Usefulness of cell-penetrating peptides to improve intestinal insulin absorption.

    Noriyasu Kamei;Mariko Morishita;Yoshimi Eda;Nobuo Ida

  • Novel oral insulin delivery systems based on complexation polymer hydrogels: single and multiple administration studies in type 1 and 2 diabetic rats.

    Mariko Morishita;Takahiro Goto;Koji Nakamura;Anthony M. Lowman

  • Characteristics of polyion complexes of chitosan with sodium alginate and sodium polyacrylate

    Toshiya Takahashi;Kozo Takayama;Yoshiharu Machida;Tsuneji Nagai

  • Site-dependent effect of aprotinin, sodium caprate, Na2EDTA and sodium glycocholate on intestinal absorption of insulin

    Mariko Morishita;Isao Morishita;Kozo Takayama;Yoshiharu Machida

  • A novel approach using functional peptides for efficient intestinal absorption of insulin.

    Mariko Morishita;Noriyasu Kamei;Jumpei Ehara;Koichi Isowa

  • Elucidation of the mechanism of incorporation of insulin in controlled release systems based on complexation polymers.

    Mariko Morishita;Anthony M. Lowman;Kozo Takayama;Tsuneji Nagai

  • Novel Chitosan Particles and Chitosan-Coated Emulsions Inducing Immune Response via Intranasal Vaccine Delivery

    Takahiro Nagamoto;Yoshiyuki Hattori;Kozo Takayama;Yoshie Maitani

  • Pluronic F-127 gels incorporating highly purified unsaturated fatty acids for buccal delivery of insulin.

    Mariko Morishita;Jose Mario Barichello;Kozo Takayama;Yoshiyuki Chiba

  • Once-daily propranolol extended-release tablet dosage form: formulation design and in vitro/in vivo investigation.

    Yaw-Bin Huang;Yi-Hung Tsai;Wan-Chiech Yang;Jui-Sheng Chang

  • Mucosal insulin delivery systems based on complexation polymer hydrogels: effect of particle size on insulin enteral absorption.

    Mariko Morishita;Takahiro Goto;Nicholas A Peppas;Jeffery I Joseph

  • Importance of intermolecular interaction on the improvement of intestinal therapeutic peptide/protein absorption using cell-penetrating peptides.

    Noriyasu Kamei;Mariko Morishita;Kozo Takayama

  • Artificial Neural Network as a Novel Method to Optimize Pharmaceutical Formulations

    Kozo Takayama;Mikito Fujikawa;Tsuneji Nagai

  • Improvement of the Oral Drug Absorption of Topotecan through the Inhibition of Intestinal Xenobiotic Efflux Transporter, Breast Cancer Resistance Protein, by Excipients

    Tetsuo Yamagata;Hiroyuki Kusuhara;Mariko Morishita;Kozo Takayama

  • In vivo proof of concept of oral insulin delivery based on a co-administration strategy with the cell-penetrating peptide penetratin.

    Ebbe Juel Bech Nielsen;Shinya Yoshida;Noriyasu Kamei;Ruisha Iwamae

  • Effect of interpolymer complex formation on bioadhesive property and drug release phenomenon of compressed tablet consisting of chitosan and sodium hyaluronate.

    Kozo Takayama;Meiko Hirata;Yoshiharu Machida;Tomoaki Masada

  • Effect of excipients on breast cancer resistance protein substrate uptake activity.

    Tetsuo Yamagata;Hiroyuki Kusuhara;Mariko Morishita;Kozo Takayama

  • Neural network based optimization of drug formulations.

    Kozo Takayama;Mikito Fujikawa;Yasuko Obata;Mariko Morishita

  • Evaluation of the Disintegration Time of Rapidly Disintegrating Tablets via a Novel Method Utilizing a CCD Camera

    Yutaka Morita;Yuki Tsushima;Masanobu Yasui;Ryoji Termoz

  • Effect of cell-penetrating peptides on the nasal absorption of insulin

    El-Sayed Khafagy;Mariko Morishita;Koichi Isowa;Jun Imai

  • Uptake and release of budesonide from mucoadhesive, pH-sensitive copolymers and their application to nasal delivery

    Kouji Nakamura;Yoshie Maitani;Anthony M Lowman;Kozo Takayama

Frequent Co-Authors

Tsuneji Nagai
Tsuneji Nagai Nagai Foundation
Yoshiharu Machida
Yoshiharu Machida Hoshi University
Nicholas A. Peppas
Nicholas A. Peppas The University of Texas at Austin
Kenji Sugibayashi
Kenji Sugibayashi Josai University
Yuichi Sugiyama
Yuichi Sugiyama University of Tokyo
Hiroyuki Kusuhara
Hiroyuki Kusuhara University of Tokyo
Yoshikazu Uchida
Yoshikazu Uchida University of California, San Francisco
Praneet Opanasopit
Praneet Opanasopit Silpakorn University
Walter M. Holleran
Walter M. Holleran University of California, San Francisco
Makoto Otsuka
Makoto Otsuka Musashino University

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