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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Physics 72 3570 3394 1675 1559 195 24111

Shoko Sakai publications per year

The chart shows the history of publications by Shoko Sakai between 1994 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Shoko Sakai published across 32 years, from 1994 to 2025, averaging 6.5 papers a year. Output peaked at 29 publications in 2010. 6 of the 207 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1994 to 2025. Vertical axis: number of publications, 0 to 29. Peak 29 publications in 2010. 1994: 2 publications 1995: 4 publications 1996: 4 publications 1997: 8 publications 1998: 21 publications 1999: 19 publications 2000: 13 publications 2001: 4 publications 2002: 4 publications 2003: 0 publications 2004: 2 publications 2005: 3 publications 2006: 10 publications 2007: 10 publications 2008: 7 publications 2009: 9 publications 2010: 29 publications 2011: 13 publications 2012: 1 publication 2013: 0 publications 2014: 1 publication 2015: 0 publications 2016: 1 publication 2017: 3 publications 2018: 4 publications 2019: 9 publications 2020: 5 publications 2021: 4 publications 2022: 1 publication 2023: 10 publications 2024: 4 publications 2025: 2 publications
1994 2025

207 publications in total across all disciplines

View publications per year as a table
Shoko Sakai: publications per year, 1994 to 2025
Year Publications
1994 2
1995 4
1996 4
1997 8
1998 21
1999 19
2000 13
2001 4
2002 4
2003 0
2004 2
2005 3
2006 10
2007 10
2008 7
2009 9
2010 29
2011 13
2012 1
2013 0
2014 1
2015 0
2016 1
2017 3
2018 4
2019 9
2020 5
2021 4
2022 1
2023 10
2024 4
2025 2
Total 207
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Shoko Sakai 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 Shoko Sakai sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 70 bars. Horizontal axis: publications, 103–122 to 1,469+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 323–342 publications. The last bar groups every scientist with 1,469 publications or more. The highlighted bar, 183–202 publications, is where this scientist sits. 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
103–122 publications 1,469+

This scientist: 195 publications — 3rd percentile

3% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Physics scientists by publication count, Research.com 2026 ranking edition. Based on 3,678 ranked scientists.
Publications Scientists This scientist
103–122 7
123–142 10
143–162 31
163–182 35
183–202 53 195
203–222 81
223–242 85
243–262 112
263–282 114
283–302 126
303–322 136
323–342 162
343–362 155
363–382 156
383–402 134
403–422 145
423–442 147
443–462 131
463–482 131
483–502 116
503–522 106
523–542 103
543–562 87
563–582 84
583–602 94
603–622 70
623–642 76
643–662 60
663–682 54
683–702 60
703–722 48
723–742 64
743–762 48
763–782 37
783–802 43
803–822 34
823–842 36
843–862 32
863–882 32
883–902 31
903–922 25
923–942 15
943–962 24
963–982 13
983–1,002 21
1,003–1,022 21
1,023–1,042 16
1,043–1,062 9
1,063–1,082 19
1,083–1,102 11
1,103–1,122 17
1,123–1,142 11
1,143–1,162 7
1,163–1,182 4
1,183–1,202 10
1,203–1,222 8
1,223–1,242 16
1,243–1,262 4
1,263–1,282 10
1,283–1,302 5
1,303–1,322 7
1,323–1,342 4
1,343–1,362 8
1,363–1,382 6
1,383–1,402 7
1,403–1,422 3
1,423–1,442 4
1,443–1,462 4
1,463–1,468 3
1,469+ 100
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Shoko Sakai 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 Shoko Sakai sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 59 bars. Horizontal axis: D-Index, 70–71 to 185+. Vertical axis: number of scientists, 0 to 167. Most scientists, 167, have 80–81 D-Index. The last bar groups every scientist with 185 D-Index or more. The highlighted bar, 72–73 D-Index, is where this scientist sits. 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
70–71 D-Index 185+

This scientist: 72 D-Index — 3rd percentile

3% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Physics scientists by D-index, Research.com 2026 ranking edition. Based on 3,678 ranked scientists.
D-Index Scientists This scientist
70–71 76
72–73 110 72
74–75 143
76–77 153
78–79 144
80–81 167
82–83 167
84–85 166
86–87 132
88–89 155
90–91 134
92–93 137
94–95 102
96–97 112
98–99 110
100–101 116
102–103 97
104–105 103
106–107 87
108–109 90
110–111 67
112–113 78
114–115 75
116–117 67
118–119 69
120–121 60
122–123 59
124–125 53
126–127 42
128–129 41
130–131 33
132–133 32
134–135 45
136–137 19
138–139 24
140–141 28
142–143 31
144–145 22
146–147 20
148–149 12
150–151 16
152–153 24
154–155 23
156–157 15
158–159 15
160–161 11
162–163 17
164–165 12
166–167 11
168–169 9
170–171 9
172–173 11
174–175 4
176–177 8
178–179 5
180–181 3
182–183 4
184 4
185+ 99
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Overview

Shoko Sakai is affiliated with the University of California, Los Angeles in the United States. Their research primarily falls under the broad field of Physics and Astronomy, with a significant focus on Astronomy and Astrophysics as a subfield. They have also contributed to Biomedical Engineering, Instrumentation, Atomic and Molecular Physics, and Optics, as well as Computational Mechanics.

Their work covers a variety of main topics, including:

  • Astrophysical Phenomena and Observations
  • Stellar, planetary, and galactic studies
  • Pulsars and Gravitational Waves Research
  • Astrophysics and Star Formation Studies
  • Mechanics and Biomechanics Studies
  • Astronomy and Astrophysical Research
  • Adaptive optics and wavefront sensing

Sakai has frequently published in several venues. The most common publication outlets are:

  • The Astrophysical Journal
  • arXiv (Cornell University)
  • The Astronomical Journal
  • Physical Review Letters
  • The Astrophysical Journal Letters

Their co-authorship network includes collaborations with several researchers, notably:

  • A. M. Ghez
  • Tuan Do
  • Jessica R. Lu
  • Abhimat K. Gautam
  • Matthew W. Hosek

Selected recent papers authored or co-authored by Sakai include:

  • "Search for a Variation of the Fine Structure Constant around the Supermassive Black Hole in Our Galactic Center" (2020), published in Physical Review Letters
  • "Stellar Populations in the Central 0.5 pc of Our Galaxy. III. The Dynamical Substructures" (2023), published in The Astrophysical Journal
  • "The Swansong of the Galactic Center Source X7: An Extreme Example of Tidal Evolution near the Supermassive Black Hole" (2023), published in The Astrophysical Journal
  • "Evidence of a Decreased Binary Fraction for Massive Stars within 20 milliparsecs of the Supermassive Black Hole at the Galactic Center" (2023), published in The Astrophysical Journal
  • "Near-infrared Flux Distribution of Sgr A* from 2005-2022: Evidence for an Enhanced Accretion Episode in 2019" (2023), published in The Astrophysical Journal Letters

Best Publications

  • Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant

    Wendy L. Freedman;Barry F. Madore;Barry F. Madore;Brad K. Gibson;Laura Ferrarese

  • The HST Key Project on the Extragalactic Distance Scale. XXVIII. Combining the Constraints on the Hubble Constant

    Jeremy R Mould;John P Huchra;Wendy L Freedman;Robert C Kennicutt Jr

  • The Hubble Space Telescope Key Project on the Extragalactic Distance Scale. XXVIII. Combining the Constraints on the Hubble Constant

    Jeremy R. Mould;John P. Huchra;Wendy L. Freedman;Robert C. Kennicutt

  • Comparison of H-alpha and UV Star Formation Rates in the Local Volume: Systematic Discrepancies for Dwarf Galaxies

    Janice C. Lee;Armando Gil de Paz;Christy Tremonti;Robert C. Kennicutt

  • An Hα Imaging Survey of Galaxies in the Local 11 Mpc Volume

    Robert C. Kennicutt;Robert C. Kennicutt;Janice C. Lee;Janice C. Lee;S. J. José G. Funes;S. J. José G. Funes;Shoko Sakai

  • An H-alpha Imaging Survey of Galaxies in the Local 11 Mpc Volume

    Robert C. Kennicutt Jr.;Janice C. Lee;Jose G. Funes S. J.;Shoko Sakai

  • COMPARISON OF Hα AND UV STAR FORMATION RATES IN THE LOCAL VOLUME: SYSTEMATIC DISCREPANCIES FOR DWARF GALAXIES

    Janice C. Lee;Armando Gil de Paz;Christy Tremonti;Christy Tremonti;Robert C. Kennicutt;Robert C. Kennicutt

  • THE SPITZER LOCAL VOLUME LEGACY: SURVEY DESCRIPTION AND INFRARED PHOTOMETRY

    D. A. Dale;S. A. Cohen;L. C. Johnson;L. C. Johnson;M. D. Schuster

  • The Calibration of Monochromatic Far-Infrared Star Formation Rate Indicators

    D. Calzetti;S. Y. Wu;S. Hong;R. C. Kennicutt

  • The HST Key Project on the Extragalactic Distance Scale XIII. The Metallicity Dependence of the Cepheid Distance Scale

    R. Kennicutt;P. Stetson;A. Saha;D. Kelson

  • Tip of the Red Giant Branch Distances. II. Zero-Point Calibration

    Luca Rizzi;R. Brent Tully;Dmitry Makarov;Dmitry Makarov;Dmitry Makarov;Lidia Makarova;Lidia Makarova;Lidia Makarova

  • Observation of an Antimatter Hypernucleus

    B. I. Abelev;M. M. Aggarwal;Z. Ahammed;A. V. Alakhverdyants

  • The Hubble Space Telescope Key Project on the Extragalactic Distance Scale. XXVI. The Calibration of Population II Secondary Distance Indicators and the Value of the Hubble Constant

    Laura Ferrarese;Jeremy R. Mould;Robert C. Kennicutt;John Huchra

  • The Hubble Space Telescope Key Project on the Extragalactic Distance Scale. XIII. The Metallicity Dependence of the Cepheid Distance Scale

    Robert C. Kennicutt;Peter B. Stetson;Abhijit Saha;Dan Kelson

  • A galex ultraviolet imaging survey of galaxies in the local volume

    Janice C. Lee;Armando Gil de Paz;Robert C. Kennicutt;Robert C. Kennicutt;Matthew Bothwell

  • The HST Key Project on the Extragalactic Distance Scale XXVI. The Calibration of Population II Secondary Distance Indicators and the Value of the Hubble Constant

    Laura Ferrarese;Jeremy R. Mould;Robert C. Kennicutt;John Huchra

  • A GALEX Ultraviolet Imaging Survey of Galaxies in the Local Volume

    Janice C. Lee;Armando Gil de Paz;Robert C. Kennicutt;Matthew Bothwell

  • Tip of the Red Giant Branch Distances to Galaxies. III. The Dwarf Galaxy Sextans A

    Shoko Sakai;Barry F. Madore;Wendy L. Freedman

  • The Hubble Space Telescope Key Project on the Extragalactic Distance Scale. XXIV. The Calibration of Tully-Fisher Relations and the Value of the Hubble Constant

    Shoko Sakai;Jeremy R. Mould;Shaun M. G. Hughes;John P. Huchra

  • Dwarf Galaxy Starburst Statistics in the Local Volume

    Janice C. Lee;Janice C. Lee;Robert C. Kennicutt;Robert C. Kennicutt;S. J. José G. Funes;S. J. José G. Funes;Shoko Sakai

Frequent Co-Authors

Robert C. Kennicutt
Robert C. Kennicutt University of Cambridge
Wendy L. Freedman
Wendy L. Freedman University of Chicago
Laura Ferrarese
Laura Ferrarese National Academies of Sciences, Engineering, and Medicine
Jeremy Mould
Jeremy Mould Swinburne University of Technology
Barry F. Madore
Barry F. Madore Carnegie Institution for Science
Brad K. Gibson
Brad K. Gibson University of Hull
Peter B. Stetson
Peter B. Stetson University of Victoria
Garth D. Illingworth
Garth D. Illingworth University of California, Santa Cruz
John P. Huchra
John P. Huchra Harvard University
Madan M. Aggarwal
Madan M. Aggarwal Panjab University

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