World's Best Scientists 2026 revealed!
Koichi Yamashita

Koichi Yamashita

D-Index & Metrics

Chemistry

D-Index
57
Citations
12271
World Ranking
11034
National Ranking
808

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.

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 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.

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.

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 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.

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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