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Koichi Yamashita

Koichi Yamashita

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 57 11034 9960 808 742 434 12271

Koichi Yamashita publications per year

The chart shows the history of publications by Koichi Yamashita between 1966 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Koichi Yamashita published across 60 years, from 1966 to 2025, averaging 8.1 papers a year. Output peaked at 31 publications in 2017. 15 of the 485 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1966 to 2025. Vertical axis: number of publications, 0 to 31. Peak 31 publications in 2017. 1966: 1 publication 1967: 0 publications 1968: 0 publications 1969: 0 publications 1970: 0 publications 1971: 0 publications 1972: 0 publications 1973: 0 publications 1974: 0 publications 1975: 0 publications 1976: 0 publications 1977: 1 publication 1978: 3 publications 1979: 1 publication 1980: 2 publications 1981: 2 publications 1982: 4 publications 1983: 0 publications 1984: 2 publications 1985: 1 publication 1986: 4 publications 1987: 4 publications 1988: 1 publication 1989: 2 publications 1990: 8 publications 1991: 4 publications 1992: 4 publications 1993: 7 publications 1994: 3 publications 1995: 2 publications 1996: 4 publications 1997: 9 publications 1998: 10 publications 1999: 9 publications 2000: 6 publications 2001: 9 publications 2002: 8 publications 2003: 7 publications 2004: 4 publications 2005: 10 publications 2006: 19 publications 2007: 13 publications 2008: 15 publications 2009: 12 publications 2010: 19 publications 2011: 26 publications 2012: 27 publications 2013: 25 publications 2014: 20 publications 2015: 25 publications 2016: 16 publications 2017: 31 publications 2018: 24 publications 2019: 18 publications 2020: 11 publications 2021: 6 publications 2022: 14 publications 2023: 17 publications 2024: 7 publications 2025: 8 publications
1966 2025

485 publications in total across all disciplines

View publications per year as a table
Koichi Yamashita: publications per year, 1966 to 2025
Year Publications
1966 1
1967 0
1968 0
1969 0
1970 0
1971 0
1972 0
1973 0
1974 0
1975 0
1976 0
1977 1
1978 3
1979 1
1980 2
1981 2
1982 4
1983 0
1984 2
1985 1
1986 4
1987 4
1988 1
1989 2
1990 8
1991 4
1992 4
1993 7
1994 3
1995 2
1996 4
1997 9
1998 10
1999 9
2000 6
2001 9
2002 8
2003 7
2004 4
2005 10
2006 19
2007 13
2008 15
2009 12
2010 19
2011 26
2012 27
2013 25
2014 20
2015 25
2016 16
2017 31
2018 24
2019 18
2020 11
2021 6
2022 14
2023 17
2024 7
2025 8
Total 485
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Koichi Yamashita 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 Koichi Yamashita 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, 421–440 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: 434 publications — 83rd percentile

83% 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
421–440 327 434
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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Koichi Yamashita 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 Koichi Yamashita 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

Koichi Yamashita is affiliated with the University of Tokyo in Japan. Their research spans several intersecting scientific disciplines, including chemistry, materials science, and engineering. The breadth of their work incorporates both theoretical and applied aspects, with a significant focus on molecular interactions and advanced materials.

The main fields of study in Yamashita's portfolio include:

  • Chemistry
  • Materials Science
  • Engineering

Within these broader categories, their subfields comprise:

  • Electrical and Electronic Engineering
  • Materials Chemistry
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Organic Chemistry

Their principal research topics involve:

  • Perovskite Materials and Applications
  • Crystallography and molecular interactions
  • Chemical Thermodynamics and Molecular Structure
  • Advanced Photocatalysis Techniques
  • Chalcogenide Semiconductor Thin Films
  • Conducting polymers and applications
  • Inorganic Fluorides and Related Compounds

Yamashita has coauthored multiple papers with various researchers, frequently collaborating with:

  • Pradeep R. Varadwaj
  • Helder M. Marques
  • Arpita Varadwaj
  • M. Kaneko
  • Azusa Muraoka

Their work has appeared in prominent publication venues such as:

  • International Journal of Molecular Sciences
  • CrystEngComm
  • Physical Chemistry Chemical Physics
  • The Journal of Chemical Physics
  • Inorganics

Notable recent papers by Yamashita include:

  • Definition of the tetrel bond, 2023, CrystEngComm
  • Unveiling charge dynamics of visible light absorbing oxysulfide for efficient overall water splitting, 2021, Nature Communications
  • Phase evolution of electrochemically potassium intercalated graphite, 2021, Journal of Materials Chemistry A
  • Definition of the Pnictogen Bond: A Perspective, 2022, Inorganics
  • The Nitrogen Bond, or the Nitrogen-Centered Pnictogen Bond: The Covalently Bound Nitrogen Atom in Molecular Entities and Crystals as a Pnictogen Bond Donor, 2022, Compounds

Best Publications

  • Small photocarrier effective masses featuring ambipolar transport in methylammonium lead iodide perovskite: A density functional analysis

    Giacomo Giorgi;Jun-Ichi Fujisawa;Jun-Ichi Fujisawa;Hiroshi Segawa;Koichi Yamashita

  • Thermal degradation of poly((R)-3-hydroxybutyrate), poly(e-caprolactone), and poly((S)-lactide)

    Yoshihiro Aoyagi;Koichi Yamashita;Yoshiharu Doi

  • Charge Carrier Trapping at Surface Defects of Perovskite Solar Cell Absorbers: A First-Principles Study

    Hiroki Uratani;Koichi Yamashita

  • Black Phosphorus as a High-Capacity, High-Capability Negative Electrode for Sodium-Ion Batteries: Investigation of the Electrode/Electrolyte Interface

    Mouad Dahbi;Mouad Dahbi;Naoaki Yabuuchi;Naoaki Yabuuchi;Mika Fukunishi;Kei Kubota;Kei Kubota

  • Redox-responsive molecular helices with highly condensed π -clouds

    Eisuke Ohta;Hiroyasu Sato;Shinji Ando;Atsuko Kosaka

  • Cation Role in Structural and Electronic Properties of 3D Organic–Inorganic Halide Perovskites: A DFT Analysis

    Giacomo Giorgi;Jun Ichi Fujisawa;Jun Ichi Fujisawa;Hiroshi Segawa;Koichi Yamashita

  • The mechanism of slow hot-hole cooling in lead-iodide perovskite: first-principles calculation on carrier lifetime from electron-phonon interaction.

    Hiroki Kawai;Giacomo Giorgi;Andrea Marini;Koichi Yamashita

  • Theoretical study of the structure and optical properties of carbon-doped rutile and anatase titanium oxides

    Hideyuki Kamisaka;Takahisa Adachi;Koichi Yamashita

  • Electronic Band Structure of Transparent Conductor: Nb-Doped Anatase TiO2

    Taro Hitosugi;Hideyuki Kamisaka;Koichi Yamashita;Hiroyuki Nogawa

  • Ab initio MO study of neutral and cationic boron clusters

    Hiroshi Kato;Koichi Yamashita;Keiji Morokuma

  • Enzymatic degradation of poly(L-lactide) film by proteinase K: quartz crystal microbalance and atomic force microscopy study.

    Koichi Yamashita;Yoshihiro Kikkawa;Kenji Kurokawa;Yoshiharu Doi

  • ‘‘Direct’’ calculation of quantum mechanical rate constants via path integral methods: Application to the reaction path Hamiltonian, with numerical test for the H+H2 reaction in 3D

    Koichi Yamashita;William H. Miller

  • Significance of hydrogen bonding and other noncovalent interactions in determining octahedral tilting in the CH 3 NH 3 PbI 3 hybrid organic-inorganic halide perovskite solar cell semiconductor

    Pradeep R. Varadwaj;Arpita Varadwaj;Arpita Varadwaj;Helder M. Marques;Koichi Yamashita

  • Organic - Inorganic hybrid lead iodide perovskite featuring zero dipole moment guanidinium cations: A theoretical analysis

    Giacomo Giorgi;Jun Ichi Fujisawa;Jun Ichi Fujisawa;Hiroshi Segawa;Koichi Yamashita

  • Organic–inorganic halide perovskites: an ambipolar class of materials with enhanced photovoltaic performances

    Giacomo Giorgi;Koichi Yamashita

  • Density functional theory based first-principle calculation of Nb-doped anatase TiO2 and its interactions with oxygen vacancies and interstitial oxygen.

    Hideyuki Kamisaka;Taro Hitosugi;Takahiro Suenaga;Tetsuya Hasegawa

  • Ultrafast vibrationally-induced dephasing of electronic excitations in PbSe quantum dots.

    Hideyuki Kamisaka;Svetlana V. Kilina;Koichi Yamashita;Oleg V. Prezhdo

  • The Effects of the Organic–Inorganic Interactions on the Thermal Transport Properties of CH3NH3PbI3

    Tomoyuki Hata;Giacomo Giorgi;Giacomo Giorgi;Koichi Yamashita

  • New ab initio potential surfaces and three-dimensional quantum dynamics for transition state spectroscopy in ozone photodissociation

    Koichi Yamashita;Keiji Morokuma;Frederic Le Quéré;Claude Leforestier

  • Path integral Monte Carlo study on the structure and absorption spectra of alkali atoms (Li, Na, K) attached to superfluid helium clusters

    Akira Nakayama;Koichi Yamashita

Frequent Co-Authors

Hiroshi Segawa
Hiroshi Segawa University of Tokyo
Keiji Morokuma
Keiji Morokuma Kyoto University
Tokio Yamabe
Tokio Yamabe Nagasaki Institute of Applied Science
Tucker Carrington
Tucker Carrington Queen's University
Tetsuya Hasegawa
Tetsuya Hasegawa University of Tokyo
Kei Kubota
Kei Kubota Tokyo University of Science
Takeo Yamaguchi
Takeo Yamaguchi Tokyo Institute of Technology
Shinichi Komaba
Shinichi Komaba Tokyo University of Science
Taro Hitosugi
Taro Hitosugi University of Tokyo

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