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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 80 3452 3126 201 187 233 21053

Osamu Ishitani publications per year

The chart shows the history of publications by Osamu Ishitani between 1983 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Osamu Ishitani published across 43 years, from 1983 to 2025, averaging 6.1 papers a year. Output peaked at 21 publications in 2019. 18 of the 264 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1983 to 2025. Vertical axis: number of publications, 0 to 21. Peak 21 publications in 2019. 1983: 1 publication 1984: 2 publications 1985: 1 publication 1986: 0 publications 1987: 4 publications 1988: 2 publications 1989: 1 publication 1990: 1 publication 1991: 1 publication 1992: 0 publications 1993: 1 publication 1994: 4 publications 1995: 2 publications 1996: 4 publications 1997: 6 publications 1998: 2 publications 1999: 1 publication 2000: 5 publications 2001: 5 publications 2002: 4 publications 2003: 1 publication 2004: 0 publications 2005: 5 publications 2006: 1 publication 2007: 4 publications 2008: 3 publications 2009: 5 publications 2010: 4 publications 2011: 4 publications 2012: 5 publications 2013: 10 publications 2014: 8 publications 2015: 20 publications 2016: 18 publications 2017: 18 publications 2018: 17 publications 2019: 21 publications 2020: 12 publications 2021: 11 publications 2022: 14 publications 2023: 18 publications 2024: 11 publications 2025: 7 publications
1983 2025

264 publications in total across all disciplines

View publications per year as a table
Osamu Ishitani: publications per year, 1983 to 2025
Year Publications
1983 1
1984 2
1985 1
1986 0
1987 4
1988 2
1989 1
1990 1
1991 1
1992 0
1993 1
1994 4
1995 2
1996 4
1997 6
1998 2
1999 1
2000 5
2001 5
2002 4
2003 1
2004 0
2005 5
2006 1
2007 4
2008 3
2009 5
2010 4
2011 4
2012 5
2013 10
2014 8
2015 20
2016 18
2017 18
2018 17
2019 21
2020 12
2021 11
2022 14
2023 18
2024 11
2025 7
Total 264
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Osamu Ishitani 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 Osamu Ishitani 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, 221–240 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: 233 publications — 44th percentile

44% 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 1,216 233
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
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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Osamu Ishitani 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 Osamu Ishitani 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, 80–81 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: 80 D-Index — 81st percentile

81% 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
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354 80
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

Osamu Ishitani is affiliated with the Tokyo Institute of Technology in Japan and has a research focus predominantly in the fields of energy and materials science. Their work spans a variety of subfields including renewable energy, sustainability and the environment, materials chemistry, process chemistry and technology, inorganic chemistry, and organic chemistry.

The scientist's research centers on several main topics related to catalysis and energy conversion. These include CO2 reduction techniques and catalysts, advanced photocatalysis techniques, carbon dioxide utilization in catalysis, catalytic processes in materials science, electrocatalysts for energy conversion, metal-organic frameworks synthesis and applications, and radical photochemical reactions.

Notable recent publications by Osamu Ishitani encompass the following:

  • Efficient Visible-Light-Driven CO2 Reduction by a Cobalt Molecular Catalyst Covalently Linked to Mesoporous Carbon Nitride, 2020, Journal of the American Chemical Society
  • Best practices for experiments and reporting in photocatalytic CO2 reduction, 2023, Nature Catalysis
  • Photocatalytic Systems for CO2 Reduction: Metal-Complex Photocatalysts and Their Hybrids with Photofunctional Solid Materials, 2022, Accounts of Chemical Research
  • An Artificial Z-Scheme Constructed from Dye-Sensitized Metal Oxide Nanosheets for Visible Light-Driven Overall Water Splitting, 2020, Journal of the American Chemical Society
  • Utilization of Low-Concentration CO2 with Molecular Catalysts Assisted by CO2-Capturing Ability of Catalysts, Additives, or Reaction Media, 2022, Journal of the American Chemical Society

They have frequently collaborated with several co-authors, including Yusuke Tamaki, Kazuhiko Maeda, Kei Kamogawa, Yasuomi Yamazaki, and Hiromu Kumagai.

Osamu Ishitani's work is often published in venues such as the Journal of the American Chemical Society, ACS Catalysis, Chemical Science, The Cambridge Structural Database, and ECS Meeting Abstracts.

Best Publications

  • Development of an Efficient Photocatalytic System for CO2 Reduction Using Rhenium(I) Complexes Based on Mechanistic Studies

    Hiroyuki Takeda;Kazuhide Koike;Haruo Inoue;Osamu Ishitani

  • Electrons, Photons, Protons and Earth-Abundant Metal Complexes for Molecular Catalysis of CO2 Reduction

    Hiroyuki Takeda;Claudio Cometto;Osamu Ishitani;Marc Robert

  • Development of efficient photocatalytic systems for CO2 reduction using mononuclear and multinuclear metal complexes based on mechanistic studies

    Hiroyuki Takeda;Osamu Ishitani

  • Visible‐Light‐Driven CO2 Reduction with Carbon Nitride: Enhancing the Activity of Ruthenium Catalysts

    Ryo Kuriki;Keita Sekizawa;Keita Sekizawa;Osamu Ishitani;Kazuhiko Maeda

  • Photocatalytic reduction of CO2 using metal complexes

    Yasuomi Yamazaki;Hiroyuki Takeda;Osamu Ishitani

  • Nature-Inspired, Highly Durable CO2 Reduction System Consisting of a Binuclear Ruthenium(II) Complex and an Organic Semiconductor Using Visible Light.

    Ryo Kuriki;Hironori Matsunaga;Takuya Nakashima;Keisuke Wada

  • Artificial Z-scheme constructed with a supramolecular metal complex and semiconductor for the photocatalytic reduction of CO2.

    Keita Sekizawa;Kazuhiko Maeda;Kazuhiko Maeda;Kazunari Domen;Kazuhide Koike

  • Architecture of Supramolecular Metal Complexes for Photocatalytic CO2 Reduction: Ruthenium−Rhenium Bi- and Tetranuclear Complexes

    Bobak Gholamkhass;Hiroaki Mametsuka;Kazuhide Koike;Toyoaki Tanabe

  • Photoelectrochemical Reduction of CO2 Coupled to Water Oxidation Using a Photocathode with a Ru(II)–Re(I) Complex Photocatalyst and a CoOx/TaON Photoanode

    Go Sahara;Hiromu Kumagai;Kazuhiko Maeda;Nicolas Kaeffer

  • Photochemical reduction of CO₂ using TiO₂: effects of organic adsorbates on TiO₂ and deposition of Pd onto TiO₂.

    Tatsuto Yui;Akira Kan;Chieko Saitoh;Kazuhide Koike

  • Photocatalytic CO2 reduction with high turnover frequency and selectivity of formic acid formation using Ru(II) multinuclear complexes

    Yusuke Tamaki;Tatsuki Morimoto;Kazuhide Koike;Osamu Ishitani

  • A Highly Efficient Mononuclear Iridium Complex Photocatalyst for CO2 Reduction under Visible Light

    Shunsuke Sato;Takeshi Morikawa;Tsutomu Kajino;Osamu Ishitani

  • Substantial improvement in the efficiency and durability of a photocatalyst for carbon dioxide reduction using a benzoimidazole derivative as an electron donor

    Yusuke Tamaki;Kazuhide Koike;Tatsuki Morimoto;Osamu Ishitani

  • Photocatalytic CO2 reduction using a Mn complex as a catalyst

    Hiroyuki Takeda;Hiroki Koizumi;Kouhei Okamoto;Osamu Ishitani

  • Robust Binding between Carbon Nitride Nanosheets and a Binuclear Ruthenium(II) Complex Enabling Durable, Selective CO2 Reduction under Visible Light in Aqueous Solution

    Ryo Kuriki;Muneaki Yamamoto;Kimitaka Higuchi;Yuta Yamamoto

  • Photocatalytic CO2 Reduction Using Cu(I) Photosensitizers with a Fe(II) Catalyst.

    Hiroyuki Takeda;Kenji Ohashi;Akiko Sekine;Osamu Ishitani

  • Supramolecular Photocatalysts for the Reduction of CO2

    Yusuke Tamaki;Osamu Ishitani

  • Reaction mechanisms of catalytic photochemical CO2 reduction using Re(I) and Ru(II) complexes

    Yusuke Kuramochi;Osamu Ishitani;Hitoshi Ishida

  • A polymeric-semiconductor–metal-complex hybrid photocatalyst for visible-light CO2 reduction

    Kazuhiko Maeda;Kazuhiko Maeda;Keita Sekizawa;Osamu Ishitani

  • Efficient Visible-Light-Driven CO2 Reduction by a Cobalt Molecular Catalyst Covalently Linked to Mesoporous Carbon Nitride

    Bing Ma;Gui Chen;Claire Fave;Lingjing Chen

  • Photocatalytic reduction of carbon dioxide to methane and acetic acid by an aqueous suspension of metal-deposited TiO2

    Osamu Ishitani;Chieko Inoue;Yuji Suzuki;Takashi Ibusuki

Frequent Co-Authors

Kazuhide Koike
Kazuhide Koike National Institute of Advanced Industrial Science and Technology
Kazuhiko Maeda
Kazuhiko Maeda Institute of Science Tokyo
Akira Yamakata
Akira Yamakata Okayama University
Yoshiharu Uchimoto
Yoshiharu Uchimoto Kyoto University
Ryu Abe
Ryu Abe Kyoto University
Shozo Yanagida
Shozo Yanagida Osaka University
Akihiko Kudo
Akihiko Kudo Tokyo University of Science
Devens Gust
Devens Gust Arizona State University
Shinji Inagaki
Shinji Inagaki Toyota Central Research and Development Laboratories (Japan)
Thomas E. Mallouk
Thomas E. Mallouk University of Pennsylvania

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