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Ryohei Yamaguchi

Ryohei Yamaguchi

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 50 14298 12869 1110 1007 191 10029

Ryohei Yamaguchi publications per year

The chart shows the history of publications by Ryohei Yamaguchi between 1972 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ryohei Yamaguchi published across 54 years, from 1972 to 2025, averaging 4.1 papers a year. Output peaked at 15 publications in 2014. 7 of the 224 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1972 to 2025. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 2014. 1972: 4 publications 1973: 6 publications 1974: 6 publications 1975: 8 publications 1976: 5 publications 1977: 0 publications 1978: 3 publications 1979: 0 publications 1980: 5 publications 1981: 4 publications 1982: 1 publication 1983: 4 publications 1984: 4 publications 1985: 5 publications 1986: 4 publications 1987: 5 publications 1988: 9 publications 1989: 1 publication 1990: 1 publication 1991: 5 publications 1992: 1 publication 1993: 2 publications 1994: 2 publications 1995: 1 publication 1996: 2 publications 1997: 1 publication 1998: 1 publication 1999: 2 publications 2000: 1 publication 2001: 2 publications 2002: 7 publications 2003: 3 publications 2004: 9 publications 2005: 7 publications 2006: 4 publications 2007: 6 publications 2008: 10 publications 2009: 8 publications 2010: 4 publications 2011: 3 publications 2012: 6 publications 2013: 1 publication 2014: 15 publications 2015: 2 publications 2016: 1 publication 2017: 2 publications 2018: 1 publication 2019: 2 publications 2020: 2 publications 2021: 4 publications 2022: 13 publications 2023: 12 publications 2024: 4 publications 2025: 3 publications
1972 2025

224 publications in total across all disciplines

View publications per year as a table
Ryohei Yamaguchi: publications per year, 1972 to 2025
Year Publications
1972 4
1973 6
1974 6
1975 8
1976 5
1977 0
1978 3
1979 0
1980 5
1981 4
1982 1
1983 4
1984 4
1985 5
1986 4
1987 5
1988 9
1989 1
1990 1
1991 5
1992 1
1993 2
1994 2
1995 1
1996 2
1997 1
1998 1
1999 2
2000 1
2001 2
2002 7
2003 3
2004 9
2005 7
2006 4
2007 6
2008 10
2009 8
2010 4
2011 3
2012 6
2013 1
2014 15
2015 2
2016 1
2017 2
2018 1
2019 2
2020 2
2021 4
2022 13
2023 12
2024 4
2025 3
Total 224
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Ryohei Yamaguchi 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 Ryohei Yamaguchi 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, 181–200 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: 191 publications — 29th percentile

29% 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 1,344 191
201–220 1,281
221–240 1,216
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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Ryohei Yamaguchi 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 Ryohei Yamaguchi 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, 50–51 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: 50 D-Index — 21st percentile

21% 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 50
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
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

Ryohei Yamaguchi is affiliated with Kyoto University in Japan, focusing on research within Earth and Planetary Sciences and Environmental Science. Their scholarly output includes 30 publications in Earth and Planetary Sciences and 27 in Environmental Science, highlighting a substantial contribution to these fields.

Their research areas concentrate principally on Global and Planetary Change, Oceanography, Atmospheric Science, Materials Chemistry, and Artificial Intelligence. Among these, Global and Planetary Change and Oceanography represent the most prolific subfields, with 20 and 18 publications respectively.

Yamaguchi's work addresses various key topics across multiple disciplines. These include Climate variability and models, Marine and coastal ecosystems, Atmospheric and Environmental Gas Dynamics, Oceanographic and Atmospheric Processes, Advanced Thermoelectric Materials and Devices, Thermal properties of materials, and Carbon Nanotubes in Composites.

Frequent collaborators feature several researchers with whom Yamaguchi has coauthored multiple papers. These include Keith B. Rodgers, Axel Timmermann, Sun-Seon Lee, Karl Stein, and Tsuyohiko Fujigaya.

The researcher has published papers in a range of prestigious journals and venues. Notable frequent publication venues are:

  • Science Advances
  • Nature Communications
  • Journal of Climate
  • Global Biogeochemical Cycles
  • arXiv (Cornell University)

Recent papers authored or coauthored by Yamaguchi include:

  • "Ubiquity of human-induced changes in climate variability" (2021), Earth System Dynamics
  • "Reduced tropical cyclone densities and ocean effects due to anthropogenic greenhouse warming" (2020), Science Advances
  • "Future Indian Ocean warming patterns" (2023), Nature Communications
  • "Pervasive alterations to snow-dominated ecosystem functions under climate change" (2022), Proceedings of the National Academy of Sciences
  • "Emerging unprecedented lake ice loss in climate change projections" (2022), Nature Communications

Best Publications

  • Dehydrogenative Oxidation of Alcohols in Aqueous Media Using Water-Soluble and Reusable Cp*Ir Catalysts Bearing a Functional Bipyridine Ligand

    Ryoko Kawahara;Ken-ichi Fujita;Ryohei Yamaguchi

  • Homogeneous catalytic system for reversible dehydrogenation-hydrogenation reactions of nitrogen heterocycles with reversible interconversion of catalytic species.

    Ryohei Yamaguchi;Chikako Ikeda;Yoshinori Takahashi;Ken-ichi Fujita

  • Ligand-promoted dehydrogenation of alcohols catalyzed by Cp*Ir complexes. A new catalytic system for oxidant-free oxidation of alcohols.

    Ken-ichi Fujita;Nobuhide Tanino;Ryohei Yamaguchi

  • Cp*Ir-catalyzed N-alkylation of amines with alcohols. A versatile and atom economical method for the synthesis of amines

    Ken-ichi Fujita;Youichiro Enoki;Ryohei Yamaguchi

  • N-Alkylation of amines with alcohols catalyzed by a Cp*Ir complex

    Ken-ichi Fujita;Zhenzi Li;Naohiro Ozeki;Ryohei Yamaguchi

  • Multialkylation of aqueous ammonia with alcohols catalyzed by water-soluble Cp*Ir-ammine complexes

    Ryoko Kawahara;Ken-ichi Fujita;Ryohei Yamaguchi

  • Homogeneous perdehydrogenation and perhydrogenation of fused bicyclic N-heterocycles catalyzed by iridium complexes bearing a functional bipyridonate ligand.

    Ken-ichi Fujita;Yui Tanaka;Masato Kobayashi;Ryohei Yamaguchi

  • Cp*Ir Complex-Catalyzed N-Heterocyclization of Primary Amines with Diols: A New Catalytic System for Environmentally Benign Synthesis of Cyclic Amines

    Ken-ichi Fujita;and Takeshi Fujii;Ryohei Yamaguchi

  • Cooperative Catalysis by Iridium Complexes with a Bipyridonate Ligand: Versatile Dehydrogenative Oxidation of Alcohols and Reversible Dehydrogenation–Hydrogenation between 2‐Propanol and Acetone

    Ryoko Kawahara;Ken-ichi Fujita;Ryohei Yamaguchi

  • N‐Alkylation of Amines with Alcohols Catalyzed by a Water‐Soluble Cp*Iridium Complex: An Efficient Method for the Synthesis of Amines in Aqueous Media

    Ryoko Kawahara;Ken-ichi Fujita;Ryohei Yamaguchi

  • Oxidative cyclization of amino alcohols catalyzed by a CpIr complex. Synthesis of indoles, 1,2,3,4-tetrahydroquinolines, and 2,3,4,5-tetrahydro-1-benzazepine.

    Ken-Ichi Fujita;Kazunari Yamamoto;Ryohei Yamaguchi

  • Direct beta-alkylation of secondary alcohols with primary alcohols catalyzed by a CpIr complex.

    Ken-ichi Fujita;Chiho Asai;Tetsuhiro Yamaguchi;Fumihiro Hanasaka

  • Dehydrogenative Oxidation of Primary and Secondary Alcohols Catalyzed by a Cp*Ir Complex Having a Functional C,N-Chelate Ligand

    Ken-ichi Fujita;Tetsuya Yoshida;Yoichiro Imori;Ryohei Yamaguchi

  • Hydrogen Production from a Methanol–Water Solution Catalyzed by an Anionic Iridium Complex Bearing a Functional Bipyridonate Ligand under Weakly Basic Conditions

    Ken-ichi Fujita;Ryoko Kawahara;Takuya Aikawa;Ryohei Yamaguchi

  • Synthesis of five-, six-, and seven-membered ring lactams by CpRh complex-catalyzed oxidative N-heterocyclization of amino alcohols.

    Ken-ichi Fujita;Yoshinori Takahashi;Maki Owaki;Kazunari Yamamoto

  • Selective synthesis of secondary and tertiary amines by cp*iridium-catalyzed multialkylation of ammonium salts with alcohols.

    Ryohei Yamaguchi;Shoko Kawagoe;Chiho Asai;Ken-ichi Fujita

  • Synthesis of New Cationic Cp*Ir N-Heterocyclic Carbene Complexes and Their High Catalytic Activities in the Oppenauer-Type Oxidation of Primary and Secondary Alcohols

    Fumihiro Hanasaka;and Ken-ichi Fujita;Ryohei Yamaguchi

  • Dehydrogenative Oxidation of Alcohols in Aqueous Media Catalyzed by a Water-Soluble Dicationic Iridium Complex Bearing a Functional N-Heterocyclic Carbene Ligand without Using Base

    Ken-ichi Fujita;Ryuichi Tamura;Yuhi Tanaka;Masato Yoshida

  • Efficient Catalyst for Acceptorless Alcohol Dehydrogenation: Interplay of Theoretical and Experimental Studies

    Guixiang Zeng;Shigeyoshi Sakaki;Ken-ichi Fujita;Hayato Sano

  • Cp*Ir Complexes Bearing N-Heterocyclic Carbene Ligands as Effective Catalysts for Oppenauer-Type Oxidation of Alcohols

    Fumihiro Hanasaka;Ken-Ichi Fujita;Ryohei Yamaguchi

Frequent Co-Authors

Hidemasa Takaya
Hidemasa Takaya Kyoto University
Kiitiro Utimoto
Kiitiro Utimoto Kyoto University
Koji Fujita
Koji Fujita Kyoto University
Paul G. Gassman
Paul G. Gassman University of Minnesota
Ken Hirotsu
Ken Hirotsu Osaka Metropolitan University
Robert H. Crabtree
Robert H. Crabtree Yale University
Shigeyoshi Sakaki
Shigeyoshi Sakaki Kyoto University
Kazushi Mashima
Kazushi Mashima Osaka University

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