World's Best Scientists 2026 revealed!
Keiji Morokuma

Keiji Morokuma

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 129 341 14 920 73239

Keiji Morokuma publications per year

The chart shows the history of publications by Keiji Morokuma between 1957 and 2021, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Keiji Morokuma published across 65 years, from 1957 to 2021, averaging 14.2 papers a year. Output peaked at 39 publications in 2011. 5 of the 926 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1957 to 2021. Vertical axis: number of publications, 0 to 39. Peak 39 publications in 2011. 1957: 1 publication 1958: 3 publications 1959: 5 publications 1960: 3 publications 1961: 6 publications 1962: 1 publication 1963: 6 publications 1964: 2 publications 1965: 2 publications 1966: 1 publication 1967: 2 publications 1968: 2 publications 1969: 2 publications 1970: 2 publications 1971: 9 publications 1972: 8 publications 1973: 7 publications 1974: 8 publications 1975: 14 publications 1976: 8 publications 1977: 13 publications 1978: 4 publications 1979: 7 publications 1980: 17 publications 1981: 15 publications 1982: 9 publications 1983: 16 publications 1984: 15 publications 1985: 13 publications 1986: 23 publications 1987: 12 publications 1988: 11 publications 1989: 10 publications 1990: 13 publications 1991: 11 publications 1992: 10 publications 1993: 29 publications 1994: 25 publications 1995: 24 publications 1996: 26 publications 1997: 20 publications 1998: 24 publications 1999: 30 publications 2000: 16 publications 2001: 23 publications 2002: 24 publications 2003: 27 publications 2004: 20 publications 2005: 27 publications 2006: 34 publications 2007: 22 publications 2008: 20 publications 2009: 34 publications 2010: 30 publications 2011: 39 publications 2012: 31 publications 2013: 21 publications 2014: 24 publications 2015: 23 publications 2016: 16 publications 2017: 10 publications 2018: 8 publications 2019: 3 publications 2020: 4 publications 2021: 1 publication
1957 2021

926 publications in total across all disciplines

View publications per year as a table
Keiji Morokuma: publications per year, 1957 to 2021
Year Publications
1957 1
1958 3
1959 5
1960 3
1961 6
1962 1
1963 6
1964 2
1965 2
1966 1
1967 2
1968 2
1969 2
1970 2
1971 9
1972 8
1973 7
1974 8
1975 14
1976 8
1977 13
1978 4
1979 7
1980 17
1981 15
1982 9
1983 16
1984 15
1985 13
1986 23
1987 12
1988 11
1989 10
1990 13
1991 11
1992 10
1993 29
1994 25
1995 24
1996 26
1997 20
1998 24
1999 30
2000 16
2001 23
2002 24
2003 27
2004 20
2005 27
2006 34
2007 22
2008 20
2009 34
2010 30
2011 39
2012 31
2013 21
2014 24
2015 23
2016 16
2017 10
2018 8
2019 3
2020 4
2021 1
Total 926
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Keiji Morokuma 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 Keiji Morokuma 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, 901–920 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: 920 publications — 98th percentile

98% 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
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 24 920
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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Keiji Morokuma 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 Keiji Morokuma 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, 128–129 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: 129 D-Index — 98th percentile

98% 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
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 34 129
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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Research.com Recognitions

  • 1970 - Fellow of Alfred P. Sloan Foundation

Overview

Keiji Morokuma was affiliated with Kyoto University in Japan and contributed extensively to the fields of Materials Science and Chemistry. Their research spanned primarily the subfields of Materials Chemistry, Organic Chemistry, Spectroscopy, Inorganic Chemistry, and Atmospheric Science.

The scientist's work covered a range of topics including Crystallization and Solubility Studies, X-ray Diffraction in Crystallography, Luminescence and Fluorescent Materials, Molecular Sensors and Ion Detection, Organic Light-Emitting Diodes Research, Photoreceptor and Optogenetics Research, as well as Click Chemistry and its applications.

Morokuma published research papers in several reputable scientific journals with some of the most frequent publication venues being:

  • The Cambridge Structural Database
  • Angewandte Chemie International Edition
  • Communications Chemistry
  • Angewandte Chemie
  • European Journal of Inorganic Chemistry

A selection of their recent papers includes:

  • Bridged Stilbenes: AIEgens Designed via a Simple Strategy to Control the Non-radiative Decay Pathway, 2020, Angewandte Chemie International Edition
  • Molecular design strategy of fluorogenic probes based on quantum chemical prediction of intramolecular spirocyclization, 2020, Communications Chemistry
  • Bridged Stilbenes: AIEgens Designed via a Simple Strategy to Control the Non-radiative Decay Pathway, 2020, Angewandte Chemie
  • Synthesis, Structure and Reactivities of Pentacoordinated Phosphorus-Boron Bonded Compounds, 2020, European Journal of Inorganic Chemistry
  • Non-adiabatic dynamic of atmospheric unimolecular photochemical reactions of 4,4-difluoro-crotonaldehyde using TD-DFT and TSH approaches, 2021, International Journal of Quantum Chemistry

Morokuma frequently collaborated with a group of coauthors, including:

  • Nathan J. O'Brien
  • Naokazu Kano
  • Nizam Havare
  • Ryohei Uematsu
  • Romain Ramozzi

Throughout their career, Morokuma was recognized with awards such as the Fellow of Alfred P. Sloan Foundation in 1970.

Best Publications

  • ONIOM: A Multilayered Integrated MO + MM Method for Geometry Optimizations and Single Point Energy Predictions. A Test for Diels−Alder Reactions and Pt(P(t-Bu)3)2 + H2 Oxidative Addition

    Mats Svensson;Stéphane Humbel;Robert D. J. Froese;Toshiaki Matsubara

  • A NEW ONIOM IMPLEMENTATION IN GAUSSIAN98. PART I. THE CALCULATION OF ENERGIES, GRADIENTS, VIBRATIONAL FREQUENCIES AND ELECTRIC FIELD DERIVATIVES

    Stefan Dapprich;István Komáromi;K.Suzie Byun;Keiji Morokuma

  • IMOMM: A new integrated ab initio + molecular mechanics geometry optimization scheme of equilibrium structures and transition states

    Feliu Maseras;Feliu Maseras;Keiji Morokuma

  • Molecular Orbital Studies of Hydrogen Bonds. III. C=O···H–O Hydrogen Bond in H2CO···H2O and H2CO···2H2O

    Unknown

  • Catalysis Research of Relevance to Carbon Management: Progress, Challenges, and Opportunities

    Hironori Arakawa;Michele Aresta;John N. Armor;Mark A. Barteau

  • The ONIOM Method and Its Applications

    Lung Wa Chung;W. M.C. Sameera;Romain Ramozzi;Alister J. Page

  • Combining Quantum Mechanics Methods with Molecular Mechanics Methods in ONIOM.

    Thom Vreven;K Suzie Byun;István Komáromi;Stefan Dapprich

  • The IMOMO method: Integration of different levels of molecular orbital approximations for geometry optimization of large systems: Test for n‐butane conformation and SN2 reaction: RCl+Cl−

    Stéphane Humbel;Stefan Sieber;Keiji Morokuma

  • Why do molecules interact? The origin of electron donor-acceptor complexes, hydrogen bonding and proton affinity

    Unknown

  • Geometry optimization with QM/MM, ONIOM, and other combined methods. I. Microiterations and constraints.

    Thom Vreven;Keiji Morokuma;Ödön Farkas;Ödön Farkas;H. Bernhard Schlegel

  • On the application of the IMOMO (integrated molecular orbital + molecular orbital) method

    Thom Vreven;Keiji Morokuma

  • Systematic exploration of the mechanism of chemical reactions: the global reaction route mapping (GRRM) strategy using the ADDF and AFIR methods

    Satoshi Maeda;Koichi Ohno;Keiji Morokuma;Keiji Morokuma

  • MODIFICATION OF THE GAUSSIAN-2 THEORETICAL MODEL : THE USE OF COUPLED-CLUSTER ENERGIES, DENSITY-FUNCTIONAL GEOMETRIES, AND FREQUENCIES

    A. M. Mebel;K. Morokuma;Ming-Chang Lin

  • Intrinsic reaction coordinate: Calculation, bifurcation, and automated search

    Satoshi Maeda;Yu Harabuchi;Yuriko Ono;Tetsuya Taketsugu

  • Ab initio molecular orbital studies of catalytic elementary reactions and catalytic cycles of transition-metal complexes

    Nobuaki. Koga;Keiji. Morokuma

  • AB INITIO MOLECULAR ORBITAL STUDY OF THE MECHANISM OF THE GAS PHASE REACTION SO3 + H2O : IMPORTANCE OF THE SECOND WATER MOLECULE

    Keiji Morokuma;Chizuru Muguruma

  • Energetics using the single point IMOMO (integrated molecular orbital+molecular orbital) calculations: Choices of computational levels and model system

    Mats Svensson;Stéphane Humbel;Keiji Morokuma

  • Mechanistic Studies on the Reversible Hydrogenation of Carbon Dioxide Catalyzed by an Ir-PNP Complex

    Ryo Tanaka;Makoto Yamashita;Lung Wa Chung;Keiji Morokuma

  • Molecular‐Orbital Studies of Hydrogen Bonds. An Ab Initio Calculation for Dimeric H2O

    K. Morokuma;L. Pedersen

  • Determination of the lowest energy point on the crossing seam between two potential surfaces using the energy gradient

    Nobuaki Koga;Keiji Morokuma

  • The C60 Formation Puzzle “Solved”: QM/MD Simulations Reveal the Shrinking Hot Giant Road of the Dynamic Fullerene Self-Assembly Mechanism

    Stephan Irle;Guishan Zheng;Zhi Wang;Keiji Morokuma

  • An ab initio MO and MM study of homogeneous olefin polymerization with silylene-bridged zirconocene catalyst and its regio- and stereoselectivity

    Hiroshi Kawamura-Kuribayashi;Nobuaki Koga;Keiji Morokuma

Frequent Co-Authors

Djamaladdin G. Musaev
Djamaladdin G. Musaev Emory University
Stephan Irle
Stephan Irle Oak Ridge National Laboratory
Nobuaki Koga
Nobuaki Koga Nagoya University
Satoshi Maeda
Satoshi Maeda Hokkaido University
Shigeki Kato
Shigeki Kato Kyoto University
Alexander M. Mebel
Alexander M. Mebel Florida International University
Koichi Yamashita
Koichi Yamashita University of Tokyo
Kenichi Fukui
Kenichi Fukui Osaka University
Lung Wa Chung
Lung Wa Chung Southern University of Science and Technology
Thom Vreven
Thom Vreven Visterra (United States)

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