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Masami Ouchi

Masami Ouchi

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Physics
Japan
2026

D-Index & Metrics

Physics

D-Index
137
Citations
56064
World Ranking
449
National Ranking
7

Masami Ouchi publication distribution in Physics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Physics in 2026. The highlighted bar marks where Masami Ouchi sits on this spectrum.

103–122 publications: 7 scientists 123–142 publications: 10 scientists 143–162 publications: 31 scientists 163–182 publications: 35 scientists 183–202 publications: 53 scientists 203–222 publications: 81 scientists 223–242 publications: 85 scientists 243–262 publications: 112 scientists 263–282 publications: 114 scientists 283–302 publications: 126 scientists 303–322 publications: 136 scientists 323–342 publications: 162 scientists 343–362 publications: 155 scientists 363–382 publications: 156 scientists 383–402 publications: 134 scientists 403–422 publications: 145 scientists 423–442 publications: 147 scientists 443–462 publications: 131 scientists 463–482 publications: 131 scientists 483–502 publications: 116 scientists 503–522 publications: 106 scientists 523–542 publications: 103 scientists 543–562 publications: 87 scientists 563–582 publications: 84 scientists 583–602 publications: 94 scientists 603–622 publications: 70 scientists 623–642 publications: 76 scientists 643–662 publications: 60 scientists 663–682 publications: 54 scientists 683–702 publications: 60 scientists 703–722 publications: 48 scientists 723–742 publications: 64 scientists 743–762 publications: 48 scientists 763–782 publications: 37 scientists 783–802 publications: 43 scientists 803–822 publications: 34 scientists 823–842 publications: 36 scientists 843–862 publications: 32 scientists 863–882 publications: 32 scientists 883–902 publications: 31 scientists 903–922 publications: 25 scientists 923–942 publications: 15 scientists 943–962 publications: 24 scientists 963–982 publications: 13 scientists 983–1,002 publications: 21 scientists 1,003–1,022 publications: 21 scientists 1,023–1,042 publications: 16 scientists 1,043–1,062 publications: 9 scientists 1,063–1,082 publications: 19 scientists 1,083–1,102 publications: 11 scientists 1,103–1,122 publications: 17 scientists 1,123–1,142 publications: 11 scientists 1,143–1,162 publications: 7 scientists 1,163–1,182 publications: 4 scientists 1,183–1,202 publications: 10 scientists 1,203–1,222 publications: 8 scientists 1,223–1,242 publications: 16 scientists 1,243–1,262 publications: 4 scientists 1,263–1,282 publications: 10 scientists 1,283–1,302 publications: 5 scientists 1,303–1,322 publications: 7 scientists 1,323–1,342 publications: 4 scientists 1,343–1,362 publications: 8 scientists 1,363–1,382 publications: 6 scientists 1,383–1,402 publications: 7 scientists 1,403–1,422 publications: 3 scientists 1,423–1,442 publications: 4 scientists 1,443–1,462 publications: 4 scientists 1,463–1,468 publications: 3 scientists 1,469+ publications: 100 scientists
103 publications 1,469+

This scientist: 511 publications — 58th percentile

58% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,469 publications or more.

Masami Ouchi D-index placement in Physics in 2026

The chart shows the D-index (discipline H-index) distribution of Physics scientists ranked by Research.com in 2026. The highlighted bar marks where Masami Ouchi sits on this spectrum.

70–71 D-Index: 76 scientists 72–73 D-Index: 110 scientists 74–75 D-Index: 143 scientists 76–77 D-Index: 153 scientists 78–79 D-Index: 144 scientists 80–81 D-Index: 167 scientists 82–83 D-Index: 167 scientists 84–85 D-Index: 166 scientists 86–87 D-Index: 132 scientists 88–89 D-Index: 155 scientists 90–91 D-Index: 134 scientists 92–93 D-Index: 137 scientists 94–95 D-Index: 102 scientists 96–97 D-Index: 112 scientists 98–99 D-Index: 110 scientists 100–101 D-Index: 116 scientists 102–103 D-Index: 97 scientists 104–105 D-Index: 103 scientists 106–107 D-Index: 87 scientists 108–109 D-Index: 90 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 78 scientists 114–115 D-Index: 75 scientists 116–117 D-Index: 67 scientists 118–119 D-Index: 69 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 59 scientists 124–125 D-Index: 53 scientists 126–127 D-Index: 42 scientists 128–129 D-Index: 41 scientists 130–131 D-Index: 33 scientists 132–133 D-Index: 32 scientists 134–135 D-Index: 45 scientists 136–137 D-Index: 19 scientists 138–139 D-Index: 24 scientists 140–141 D-Index: 28 scientists 142–143 D-Index: 31 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 20 scientists 148–149 D-Index: 12 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 24 scientists 154–155 D-Index: 23 scientists 156–157 D-Index: 15 scientists 158–159 D-Index: 15 scientists 160–161 D-Index: 11 scientists 162–163 D-Index: 17 scientists 164–165 D-Index: 12 scientists 166–167 D-Index: 11 scientists 168–169 D-Index: 9 scientists 170–171 D-Index: 9 scientists 172–173 D-Index: 11 scientists 174–175 D-Index: 4 scientists 176–177 D-Index: 8 scientists 178–179 D-Index: 5 scientists 180–181 D-Index: 3 scientists 182–183 D-Index: 4 scientists 184 D-Index: 4 scientists 185+ D-Index: 99 scientists
70 D-Index 185+

This scientist: 137 D-Index — 88th percentile

88% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 185 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Physics in Japan Leader Award
  • 2025 - Research.com Physics in Japan Leader Award
  • 2023 - Research.com Physics in Japan Leader Award
  • 2022 - Research.com Physics in Japan Leader Award

Overview

Masami Ouchi is a researcher affiliated with the University of Tokyo in Japan. Their academic work centers primarily in the field of Physics and Astronomy, with a substantial focus on Astronomy and Astrophysics. Their contributions extend across several subfields including Instrumentation, Nuclear and High Energy Physics, Atomic and Molecular Physics as well as Optics, and Statistical and Nonlinear Physics.

The main topics of Masami Ouchi's research cover a wide range within astrophysics and related studies. These topics include:

  • Galaxies: Formation, Evolution, Phenomena
  • Astronomy and Astrophysical Research
  • Stellar, planetary, and galactic studies
  • Gamma-ray bursts and supernovae
  • Astrophysics and Star Formation Studies
  • Astrophysical Phenomena and Observations
  • Astrophysics and Cosmic Phenomena

Ouchi has published extensively, with their work appearing frequently in several scientific venues. The most common publication platforms for their research are:

  • arXiv (Cornell University)
  • The Astrophysical Journal
  • The Astrophysical Journal Supplement Series
  • Monthly Notices of the Royal Astronomical Society
  • Astronomy and Astrophysics

Among their recent papers, notable examples include:

  • A Comprehensive Study of Galaxies at z ∼ 9-16 Found in the Early JWST Data: Ultraviolet Luminosity Functions and Cosmic Star Formation History at the Pre-reionization Epoch (2023, The Astrophysical Journal Supplement Series)
  • A JWST/NIRSpec First Census of Broad-line AGNs at z = 4-7: Detection of 10 Faint AGNs with M BH ∼ 106-108 M and Their Host Galaxy Properties (2023, The Astrophysical Journal)
  • Third data release of the Hyper Suprime-Cam Subaru Strategic Program (2021, Publications of the Astronomical Society of Japan)
  • Deep multiredshift limits on Epoch of Reionization 21 cm power spectra from four seasons of Murchison Widefield Array observations (2020, Monthly Notices of the Royal Astronomical Society)
  • JWST Census for the Mass-Metallicity Star Formation Relations at z = 4-10 with Self-consistent Flux Calibration and Proper Metallicity Calibrators (2023, The Astrophysical Journal Supplement Series)

Masami Ouchi's collaborative work includes frequent co-authors such as:

  • Yuichi Harikane
  • Yoshiaki Ono
  • Kimihiko Nakajima
  • Yuki Isobe
  • Hiroya Umeda

Best Publications

  • The Hyper Suprime-Cam SSP Survey: Overview and Survey Design

    H. Aihara;N. Arimoto;R. Armstrong;S. Arnouts

  • Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models

    Masami Ouchi;Kazuhiro Shimasaku;Hisanori Furusawa;Tomoki Saito

  • The Subaru/XMM-Newton Deep Survey (SXDS). IV. Evolution of Lya Emitters from z=3.1 to 5.7 in the 1 deg^2 Field: Luminosity Functions and AGN

    Masami Ouchi;Kazuhiro Shimasaku;Masayuki Akiyama;Chris Simpson

  • Subaru Prime Focus Camera — Suprime-Cam

    Satoshi Miyazaki;Yutaka Komiyama;Maki Sekiguchi;Sadanori Okamura

  • STATISTICS OF 207 Lyα EMITTERS AT A REDSHIFT NEAR 7: CONSTRAINTS ON REIONIZATION AND GALAXY FORMATION MODELS*

    Masami Ouchi;Kazuhiro Shimasaku;Hisanori Furusawa;Tomoki Saito

  • Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties

    M. Ouchi;K. Shimasaku;S. Okamura;H. Furusawa

  • The Abundance of Star-Forming Galaxies in the Redshift Range 8.5 to 12: New Results from the 2012 Hubble Ultra Deep Field Campaign

    Richard S Ellis;Ross J McLure;James S Dunlop;Brant E Robertson

  • The Subaru/XMM-Newton Deep Survey (SXDS). IV. Evolution of Lyα Emitters from z = 3.1 to 5.7 in the 1 deg2 Field: Luminosity Functions and AGN*

    Masami Ouchi;Kazuhiro Shimasaku;Masayuki Akiyama;Chris Simpson

  • The End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field

    N. Kashikawa;K. Shimasaku;M.A. Malkan;M. Doi

  • New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign

    Brant E. Robertson;Steven R. Furlanetto;Evan Schneider;Stephane Charlot

  • Keck Spectroscopy of Faint 3<z<7 Lyman Break Galaxies: - I. New constraints on cosmic reionisation from the luminosity and redshift-dependent fraction of Lyman-alpha emission

    Daniel P. Stark;Richard S. Ellis;Kuenley Chiu;Masami Ouchi

  • Keck spectroscopy of faint 3 < z < 7 Lyman break galaxies – I. New constraints on cosmic reionization from the luminosity and redshift-dependent fraction of Lyman α emission

    Daniel P. Stark;Richard S. Ellis;Kuenley Chiu;Masami Ouchi

  • Spectroscopic Confirmation of Three z-Dropout Galaxies at z = 6.844 - 7.213: Demographics of Lyman-Alpha Emission in z ~ 7 Galaxies

    Yoshiaki Ono;Masami Ouchi;Bahram Mobasher;Mark Dickinson

  • Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)

    Masahiro Takada;Richard Ellis;Masashi Chiba;Jenny E. Greene

  • The Abundance of Star-forming Galaxies in the Redshift Range 8.5-12: New Results from the 2012 Hubble Ultra Deep Field Campaign

    Richard S. Ellis;Ross J. McLure;James S. Dunlop;Brant E. Robertson

  • The Hyper Suprime-Cam SSP Survey: Overview and survey design

    Hiroaki Aihara;Nobuo Arimoto;Nobuo Arimoto;Robert Armstrong;Stéphane Arnouts

  • The End of the Reionization Epoch Probed by Lyα Emitters at z = 6.5 in the Subaru Deep Field* **

    Nobunari Kashikawa;Kazuhiro Shimasaku;Matthew A. Malkan;Mamoru Doi

  • MORPHOLOGIES OF ∼190,000 GALAXIES AT z = 0–10 REVEALED WITH HST LEGACY DATA. I. SIZE EVOLUTION

    Takatoshi Shibuya;Takatoshi Shibuya;Masami Ouchi;Masami Ouchi;Yuichi Harikane

  • Subaru Deep Survey. VI. A Census of Lyman Break Galaxies at z ≃ 4 and 5 in the Subaru Deep Fields: Clustering Properties*

    Masami Ouchi;Kazuhiro Shimasaku;Kazuhiro Shimasaku;Sadanori Okamura;Sadanori Okamura;Hisanori Furusawa

  • Spectroscopic Confirmation of Three z-dropout Galaxies at z = 6.844-7.213: Demographics of Lyα Emission in z ~ 7 Galaxies

    Yoshiaki Ono;Masami Ouchi;Masami Ouchi;Bahram Mobasher;Mark Dickinson

Frequent Co-Authors

Kazuhiro Shimasaku
Kazuhiro Shimasaku University of Tokyo
Nobunari Kashikawa
Nobunari Kashikawa University of Tokyo
Masamune Oguri
Masamune Oguri Kavli Institute for the Physics and Mathematics of the Universe
Hisanori Furusawa
Hisanori Furusawa National Institutes of Natural Sciences
Tohru Nagao
Tohru Nagao Ehime University
Sadanori Okamura
Sadanori Okamura University of Tokyo
Yuichi Matsuda
Yuichi Matsuda The Graduate University for Advanced Studies, SOKENDAI
Satoshi Miyazaki
Satoshi Miyazaki The Graduate University for Advanced Studies, SOKENDAI
Masayuki Akiyama
Masayuki Akiyama Tohoku University
Toru Yamada
Toru Yamada Japan Aerospace Exploration Agency

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