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Kizashi Yamaguchi

Kizashi Yamaguchi

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 73 4892 4443 278 260 707 22678

Kizashi Yamaguchi publications per year

The chart shows the history of publications by Kizashi Yamaguchi between 1971 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Kizashi Yamaguchi published across 55 years, from 1971 to 2025, averaging 13.4 papers a year. Output peaked at 50 publications in 1999. 12 of the 737 publications appeared in the last two years.

No. of publications
10 20 30 40 50
Bar chart. Horizontal axis: year, 1971 to 2025. Vertical axis: number of publications, 0 to 50. Peak 50 publications in 1999. 1971: 2 publications 1972: 3 publications 1973: 4 publications 1974: 1 publication 1975: 5 publications 1976: 6 publications 1977: 8 publications 1978: 4 publications 1979: 4 publications 1980: 5 publications 1981: 6 publications 1982: 1 publication 1983: 1 publication 1984: 1 publication 1985: 1 publication 1986: 3 publications 1987: 6 publications 1988: 13 publications 1989: 9 publications 1990: 9 publications 1991: 6 publications 1992: 6 publications 1993: 11 publications 1994: 14 publications 1995: 21 publications 1996: 31 publications 1997: 39 publications 1998: 24 publications 1999: 50 publications 2000: 40 publications 2001: 31 publications 2002: 40 publications 2003: 43 publications 2004: 22 publications 2005: 34 publications 2006: 21 publications 2007: 26 publications 2008: 15 publications 2009: 25 publications 2010: 13 publications 2011: 20 publications 2012: 17 publications 2013: 12 publications 2014: 8 publications 2015: 12 publications 2016: 4 publications 2017: 5 publications 2018: 8 publications 2019: 14 publications 2020: 8 publications 2021: 5 publications 2022: 5 publications 2023: 3 publications 2024: 4 publications 2025: 8 publications
1971 2025

737 publications in total across all disciplines

View publications per year as a table
Kizashi Yamaguchi: publications per year, 1971 to 2025
Year Publications
1971 2
1972 3
1973 4
1974 1
1975 5
1976 6
1977 8
1978 4
1979 4
1980 5
1981 6
1982 1
1983 1
1984 1
1985 1
1986 3
1987 6
1988 13
1989 9
1990 9
1991 6
1992 6
1993 11
1994 14
1995 21
1996 31
1997 39
1998 24
1999 50
2000 40
2001 31
2002 40
2003 43
2004 22
2005 34
2006 21
2007 26
2008 15
2009 25
2010 13
2011 20
2012 17
2013 12
2014 8
2015 12
2016 4
2017 5
2018 8
2019 14
2020 8
2021 5
2022 5
2023 3
2024 4
2025 8
Total 737
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Kizashi 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 Kizashi 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, 701–720 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: 707 publications — 96th percentile

96% 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 57 707
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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Kizashi 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 Kizashi 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, 72–73 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: 73 D-Index — 73rd percentile

73% 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 73
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

Kizashi Yamaguchi is affiliated with Osaka University in Japan and has a research focus spanning biochemistry, genetics and molecular biology, physics and astronomy, and chemistry. Their work integrates experimental and theoretical approaches to study complex chemical and physical processes.

The scientist's research contributions cover key fields such as molecular biology, atomic and molecular physics and optics, inorganic chemistry, materials chemistry, and electronic, optical and magnetic materials. Their work particularly emphasizes photosynthetic processes and mechanisms, spectroscopy and quantum chemical studies, metal-catalyzed oxygenation mechanisms, porphyrin and phthalocyanine chemistry, magnetism in coordination complexes, photoreceptor and optogenetics research, and electrocatalysts for energy conversion.

Notable recent publications include:

  • Oxygen-evolving photosystem II structures during S1-S2-S3 transitions, 2024, Nature
  • Exploring reaction pathways for the structural rearrangements of the Mn cluster induced by water binding in the S3 state of the oxygen evolving complex of photosystem II, 2020, Journal of Photochemistry and Photobiology A Chemistry
  • Estimation of spin contamination errors in DFT/plane-wave calculations of solid materials using approximate spin projection scheme, 2020, Chemical Physics Letters
  • Geometric, electronic and spin structures of the CaMn4O5 catalyst for water oxidation in oxygen-evolving photosystem II. Interplay between experiments and theoretical computations, 2022, Coordination Chemistry Reviews
  • Development of broken-symmetry (BS) methods in chemical reactions. A theoretical view of water oxidation in photosystem II and related systems, 2020, Journal of Photochemistry and Photobiology A Chemistry

Frequent coauthors with whom Yamaguchi has collaborated extensively include Hiroshi Isobe, Takashi Kawakami, Mitsuo Shoji, Koichi Miyagawa, and Shusuke Yamanaka.

The scientist has published regularly in venues such as Chemical Physics Letters, Journal of Photochemistry and Photobiology A Chemistry, ACS Omega, Chemistry, and Molecular Physics.

Best Publications

  • A spin correction procedure for unrestricted Hartree-Fock and Møller-Plesset wavefunctions for singlet diradicals and polyradicals

    K. Yamaguchi;F. Jensen;A. Dorigo;K.N. Houk

  • Ab initio computations of effective exchange integrals for H–H, H–He–H and Mn2O2 complex: comparison of broken-symmetry approaches

    T. Soda;Y. Kitagawa;T. Onishi;Y. Takano

  • The electronic structures of biradicals in the unrestricted Hartree-Fock approximation

    Kizashi Yamaguchi

  • Theoretical Study on Second Hyperpolarizabilities of Phenylacetylene Dendrimer: Toward an Understanding of Structure−Property Relation in NLO Responses of Fractal Antenna Dendrimers

    Masayoshi Nakano;Harunori Fujita;Masahiro Takahata;Kizashi Yamaguchi

  • Mapping of the Hot Spots for DNA Damage by One-Electron Oxidation: Efficacy of GG Doublets and GGG Triplets as a Trap in Long-Range Hole Migration

    Isao Saito;Takashi Nakamura;Kazuhiko Nakatani;Yasunori Yoshioka

  • Distribution of odd electrons in ground-state molecules

    Kazuo Takatsuka;Takayuki Fueno;Kizashi Yamaguchi

  • Electroconductive porous coordination polymer Cu[Cu(pdt)2] composed of donor and acceptor building units.

    Shinya Takaishi;Miyuki Hosoda;Takashi Kajiwara;Hitoshi Miyasaka

  • Second Hyperpolarizability (γ) of Singlet Diradical System: Dependence of γ on the Diradical Character

    Masayoshi Nakano;Ryohei Kishi;Tomoshige Nitta;Takashi Kubo

  • A general algorithm for calculation of Heisenberg exchange integrals J in multispin systems

    M. Shoji;K. Koizumi;Y. Kitagawa;T. Kawakami

  • An oxyl/oxo mechanism for oxygen-oxygen coupling in PSII revealed by an x-ray free-electron laser

    Michihiro Suga;Michihiro Suga;Fusamichi Akita;Fusamichi Akita;Keitaro Yamashita;Yoshiki Nakajima

  • Size-consistent approach and density analysis of hyperpolarizability: Second hyperpolarizabilities of polymeric systems with and without defects

    Masayoshi Nakano;Isamu Shigemoto;Satoru Yamada;Kizashi Yamaguchi

  • Ab Initio MO Calculations of Effective Exchange Integrals between Transition-Metal Ions via Oxygen Dianions: Nature of the Copper-Oxygen Bonds and Superconductivity

    Kizashi Yamaguchi;Yoichi Takahara;Takayuki Fueno;Keiichiro Nasu

  • Extended Hartree-Fock (EHF) theory of chemical reactions: III. Projected Mller-Plesset (PMP) perturbation wavefunctions for transition structures of organic reactions

    K. Yamaguchi;Y. Takahara;T. Fueno;K. N. Houk

  • MOLECULAR ORBITAL (MO) THEORY FOR MAGNETICALLY INTERACTING ORGANIC COMPOUNDS. AB-INITIO MO CALCULATIONS OF THE EFFECTIVE EXCHANGE INTEGRALS FOR CYCLOPHANE-TYPE CARBENE DIMERS

    Kizashi Yamaguchi;Hiroaki Fukui;Takayuki Fueno

  • Effective exchange integrals for open-shell species by density functional methods

    Unknown

  • Ab initio molecular orbital calculations of effective exchange integrals between transition metal ions

    Kizashi Yamaguchi;Tetsuya Tsunekawa;Yasuyuki Toyoda;Takayuki Fueno

  • EHF theory of chemical reactions Part 4. UNO CASSCF, UNO CASPT2 and R(U)HF coupled-cluster (CC) wavefunctions

    S. Yamanaka;M. Okumura;M. Nakano;K. Yamaguchi

  • EXPERIMENTAL AND THEORETICAL STUDIES ON THE SELECTIVITY OF GGG TRIPLETS TOWARD ONE-ELECTRON OXIDATION IN B-FORM DNA

    Yasunori Yoshioka;Yasutaka Kitagawa;Yu Takano;Kizashi Yamaguchi

  • Basis set and electron correlation effects on the polarizability and second hyperpolarizability of model open-shell π-conjugated systems

    Benoît Champagne;Edith Botek;Masayoshi Nakano;Tomoshige Nitta

  • A molecular-orbital theoretical classification of reactions of singlet ground-state molecules

    Kizashi Yamaguchi;Takayuki Fueno;Hideo Fukutome

  • DFT studies of interaction between O 2 and Au clusters. The role of anionic surface Au atoms on Au clusters for catalyzed oxygenation

    Mitsutaka Okumura;Yasutaka Kitagawa;Masatake Haruta;Kizashi Yamaguchi

Frequent Co-Authors

Mitsutaka Okumura
Mitsutaka Okumura Osaka University
Masayoshi Nakano
Masayoshi Nakano Osaka University
Haruki Nakamura
Haruki Nakamura Osaka University
Jian-Ren Shen
Jian-Ren Shen Okayama University
Kazuhiro Nakasuji
Kazuhiro Nakasuji Osaka University
Yasushi Morita
Yasushi Morita Aichi Institute of Technology
Koji Ohta
Koji Ohta National Institute of Advanced Industrial Science and Technology
Kenji Kamada
Kenji Kamada National Institute of Advanced Industrial Science and Technology
Benoît Champagne
Benoît Champagne University of Namur
Takashi Kubo
Takashi Kubo Osaka University

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