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Kiyoshi Otsuka

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 57 11053 811 305 11988

Kiyoshi Otsuka publications per year

The chart shows the history of publications by Kiyoshi Otsuka between 1967 and 2010, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Kiyoshi Otsuka published across 44 years, from 1967 to 2010, averaging 7 papers a year. Output peaked at 23 publications in 2004. 2 of the 308 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1967 to 2010. Vertical axis: number of publications, 0 to 23. Peak 23 publications in 2004. 1967: 1 publication 1968: 1 publication 1969: 1 publication 1970: 0 publications 1971: 1 publication 1972: 2 publications 1973: 1 publication 1974: 3 publications 1975: 2 publications 1976: 0 publications 1977: 8 publications 1978: 2 publications 1979: 5 publications 1980: 5 publications 1981: 8 publications 1982: 7 publications 1983: 7 publications 1984: 3 publications 1985: 4 publications 1986: 13 publications 1987: 12 publications 1988: 6 publications 1989: 10 publications 1990: 9 publications 1991: 4 publications 1992: 12 publications 1993: 9 publications 1994: 20 publications 1995: 11 publications 1996: 8 publications 1997: 8 publications 1998: 12 publications 1999: 6 publications 2000: 10 publications 2001: 15 publications 2002: 15 publications 2003: 15 publications 2004: 23 publications 2005: 11 publications 2006: 10 publications 2007: 2 publications 2008: 4 publications 2009: 1 publication 2010: 1 publication
1967 2010

308 publications in total across all disciplines

View publications per year as a table
Kiyoshi Otsuka: publications per year, 1967 to 2010
Year Publications
1967 1
1968 1
1969 1
1970 0
1971 1
1972 2
1973 1
1974 3
1975 2
1976 0
1977 8
1978 2
1979 5
1980 5
1981 8
1982 7
1983 7
1984 3
1985 4
1986 13
1987 12
1988 6
1989 10
1990 9
1991 4
1992 12
1993 9
1994 20
1995 11
1996 8
1997 8
1998 12
1999 6
2000 10
2001 15
2002 15
2003 15
2004 23
2005 11
2006 10
2007 2
2008 4
2009 1
2010 1
Total 308
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Kiyoshi Otsuka 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 Kiyoshi Otsuka 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, 301–320 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: 305 publications — 64th percentile

64% 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
301–320 764 305
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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Kiyoshi Otsuka 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 Kiyoshi Otsuka 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, 56–57 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: 57 D-Index — 39th percentile

39% 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 57
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
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

Kiyoshi Otsuka is affiliated with the Tokyo Institute of Technology in Japan. Their academic contributions are associated with this institution, indicating an active role in research and possibly in teaching or mentoring capacities within this technical university setting.

Available data does not list recent papers, co-authors, or publication venues linked to Kiyoshi Otsuka, which limits the overview of specific research outputs or collaborative networks at this time.

Similarly, there is no information provided regarding main fields of study, subfields, or main topics of work, which restricts identification of precise scientific domains or specialized research interests.

No book publications have been recorded for this individual, suggesting the focus may primarily be on journal or conference outputs, or that such information is not currently documented.

There are no awards noted, which means no formal recognitions have been included in the available data.

Kiyoshi Otsuka is currently alive according to the data provided.

Best Publications

  • Active and selective catalysts for the synthesis of C2H4 and C2H6 via oxidative coupling of methane

    Kiyoshi Otsuka;Kiyotaka Jinno;Akira Morikawa

  • Complete removal of carbon monoxide in hydrogen-rich gas stream through methanation over supported metal catalysts

    Sakae Takenaka;Toru Shimizu;Kiyoshi Otsuka

  • Ni/SiO2 catalyst effective for methane decomposition into hydrogen and carbon nanofiber

    Sakae Takenaka;Shoji Kobayashi;Hitoshi Ogihara;Kiyoshi Otsuka

  • Direct partial oxidation of methane to synthesis gas by cerium oxide

    Kiyoshi Otsuka;Ye Wang;Eiyuh Sunada;Ichiro Yamanaka

  • Decomposition of methane over supported-Ni catalysts: effects of the supports on the catalytic lifetime

    Sakae Takenaka;Hitoshi Ogihara;Ichiro Yamanaka;Kiyoshi Otsuka

  • Direct conversion of methane into oxygenates

    Kiyoshi Otsuka;Ye Wang

  • Formation of filamentous carbons over supported Fe catalysts through methane decomposition

    Sakae Takenaka;Michio Serizawa;Kiyoshi Otsuka

  • Methane decomposition into hydrogen and carbon nanofibers over supported Pd–Ni catalysts

    Sakae Takenaka;Yukio Shigeta;Eishi Tanabe;Kiyoshi Otsuka

  • Direct and Continuous Production of Hydrogen Peroxide with 93 % Selectivity Using a Fuel‐Cell System

    Ichiro Yamanaka;Takeshi Onizawa;Sakae Takenaka;Kiyoshi Otsuka

  • Direct conversion of methane to synthesis gas through gas-solid reaction using CeO2-ZrO2 solid solution at moderate temperature

    Kiyoshi Otsuka;Ye Wang;Masaki Nakamura

  • One step synthesis of hydrogen peroxide through fuel cell reaction

    Kiyoshi Otsuka;Ichiro Yamanaka

  • Hydrogen from water by reduced cerium oxide

    Kiyoshi Otsuka;Masaharu Hatano;Akira Morikawa

  • Chemical storage of hydrogen by modified iron oxides

    K Otsuka;T Kaburagi;C Yamada;S Takenaka

  • Formation of Carbon Nanofibers and Carbon Nanotubes through Methane Decomposition over Supported Cobalt Catalysts

    Sakae Takenaka;Minoru Ishida;Michio Serizawa;Eishi Tanabe

  • Partial Oxidation of Methane Using the Redox of Cerium Oxide

    Kiyoshi Otsuka;Tetsuya Ushiyama;Ichiro Yamanaka

  • Hydrogen storage and production by redox of iron oxide for polymer electrolyte fuel cell vehicles

    K Otsuka;C Yamada;T Kaburagi;S Takenaka

  • Structural change of Ni species during the methane decomposition and the subsequent gasification of deposited carbon with CO2 over supported Ni catalysts

    Sakae Takenaka;Emi Kato;Yo Tomikubo;Kiyoshi Otsuka

  • Decomposition of methane over Ni catalysts supported on carbon fibers formed from different hydrocarbons

    Kiyoshi Otsuka;Hitoshi Ogihara;Sakae Takenaka

  • Structural Change of Ni Species in Ni/SiO2 Catalyst during Decomposition of Methane

    Sakae Takenaka;Hitoshi Ogihara;Kiyoshi Otsuka

  • Methane Decomposition into Hydrogen and Carbon Nanofibers over Supported Pd−Ni Catalysts: Characterization of the Catalysts during the Reaction

    Sakae Takenaka;Yukio Shigeta;Eishi Tanabe;Kiyoshi Otsuka

Frequent Co-Authors

Sakae Takenaka
Sakae Takenaka Doshisha University
Ye Wang
Ye Wang Xiamen University
Yuji Wada
Yuji Wada Tokyo Institute of Technology
Yoji Kobayashi
Yoji Kobayashi King Abdullah University of Science and Technology
Jack G. Calvert
Jack G. Calvert Oak Ridge National Laboratory
Huilin Wan
Huilin Wan Xiamen University

External Links

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Best Scientists Citing Kiyoshi Otsuka

Ye Wang

Ye Wang

Xiamen University

Publications: 35

Qinghong Zhang

Qinghong Zhang

Xiamen University

Publications: 27

Kongzhai Li

Kongzhai Li

Kunming University of Science and Technology

Publications: 25

Isabel Suelves

Isabel Suelves

Spanish National Research Council

Publications: 24

Liang-Shih Fan

Liang-Shih Fan

The Ohio State University

Publications: 23

David Serrano

David Serrano

IMDEA Energy Institute

Publications: 22

Graham J. Hutchings

Graham J. Hutchings

Cardiff University

Publications: 21

Sakae Takenaka

Sakae Takenaka

Doshisha University

Publications: 21

José Luis García Fierro

José Luis García Fierro

Spanish National Research Council

Publications: 21

Rafael Moliner

Rafael Moliner

Spanish National Research Council

Publications: 20

Kai Sundmacher

Kai Sundmacher

Max Planck Institute for Dynamics of Complex Technical Systems

Publications: 20

M.J. Lázaro

M.J. Lázaro

Spanish National Research Council

Publications: 18

Claude Mirodatos

Claude Mirodatos

Centre national de la recherche scientifique, CNRS

Publications: 18

Wataru Ueda

Wataru Ueda

Kanagawa University

Publications: 18

Huilin Wan

Huilin Wan

Xiamen University

Publications: 17

Vladimir Galvita

Vladimir Galvita

Ghent University

Publications: 16

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