2026 Masami Ouchi: Physics Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Physics	137	449	432	7	7	511	56064

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

979
Citations
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

955
Citations
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

922
Citations
Subaru Prime Focus Camera — Suprime-Cam

Satoshi Miyazaki;Yutaka Komiyama;Maki Sekiguchi;Sadanori Okamura

860
Citations
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

801
Citations
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

723
Citations
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

705
Citations
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

704
Citations
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

671
Citations
New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign

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

648
Citations
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

641
Citations
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

632
Citations
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

599
Citations
Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)

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

587
Citations
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

574
Citations
The Hyper Suprime-Cam SSP Survey: Overview and survey design

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

563
Citations
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

555
Citations
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

520
Citations
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

516
Citations
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

491
Citations

Frequent Co-Authors

Kazuhiro Shimasaku University of Tokyo

Nobunari Kashikawa University of Tokyo

Masamune Oguri Kavli Institute for the Physics and Mathematics of the Universe

Hisanori Furusawa National Institutes of Natural Sciences

Tohru Nagao Ehime University

Sadanori Okamura University of Tokyo

Yuichi Matsuda The Graduate University for Advanced Studies, SOKENDAI

Satoshi Miyazaki The Graduate University for Advanced Studies, SOKENDAI

Masayuki Akiyama Tohoku University

Toru Yamada Japan Aerospace Exploration Agency

External Links

Personal website of Masami Ouchi

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Masami Ouchi

D-Index & Metrics

D-Index & Metrics

Physics

Research.com Recognitions

Overview

Best Publications

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

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

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

Subaru Prime Focus Camera — Suprime-Cam

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

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

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

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*

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

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

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

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

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

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

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

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

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

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

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

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

Frequent Co-Authors

External Links

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