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Masayuki Akiyama

Masayuki Akiyama

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Physics 82 2851 2707 85 82 360 24883

Masayuki Akiyama publications per year

The chart shows the history of publications by Masayuki Akiyama between 1992 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Masayuki Akiyama published across 34 years, from 1992 to 2025, averaging 12.8 papers a year. Output peaked at 33 publications in 2008. 29 of the 434 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1992 to 2025. Vertical axis: number of publications, 0 to 33. Peak 33 publications in 2008. 1992: 1 publication 1993: 0 publications 1994: 0 publications 1995: 1 publication 1996: 2 publications 1997: 3 publications 1998: 11 publications 1999: 7 publications 2000: 10 publications 2001: 4 publications 2002: 5 publications 2003: 18 publications 2004: 16 publications 2005: 16 publications 2006: 19 publications 2007: 20 publications 2008: 33 publications 2009: 13 publications 2010: 18 publications 2011: 9 publications 2012: 21 publications 2013: 15 publications 2014: 16 publications 2015: 15 publications 2016: 14 publications 2017: 14 publications 2018: 26 publications 2019: 15 publications 2020: 19 publications 2021: 13 publications 2022: 19 publications 2023: 12 publications 2024: 19 publications 2025: 10 publications
1992 2025

434 publications in total across all disciplines

View publications per year as a table
Masayuki Akiyama: publications per year, 1992 to 2025
Year Publications
1992 1
1993 0
1994 0
1995 1
1996 2
1997 3
1998 11
1999 7
2000 10
2001 4
2002 5
2003 18
2004 16
2005 16
2006 19
2007 20
2008 33
2009 13
2010 18
2011 9
2012 21
2013 15
2014 16
2015 15
2016 14
2017 14
2018 26
2019 15
2020 19
2021 13
2022 19
2023 12
2024 19
2025 10
Total 434
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Masayuki Akiyama 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 Masayuki Akiyama 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, 343–362 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: 360 publications — 30th percentile

30% 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
203–222 81
223–242 85
243–262 112
263–282 114
283–302 126
303–322 136
323–342 162
343–362 155 360
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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Masayuki Akiyama 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 Masayuki Akiyama 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, 82–83 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: 82 D-Index — 24th percentile

24% 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
74–75 143
76–77 153
78–79 144
80–81 167
82–83 167 82
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

Masayuki Akiyama is affiliated with Tohoku University in Japan and specializes in research within the broad field of Physics and Astronomy. Their work predominantly focuses on Astronomy and Astrophysics, with significant contributions in related subfields such as Instrumentation, Nuclear and High Energy Physics, Electrical and Electronic Engineering, and Atomic and Molecular Physics and Optics.

Their main topics of study cover various aspects of galactic and cosmic phenomena, including:

  • Galaxies: Formation, Evolution, Phenomena
  • Astrophysical Phenomena and Observations
  • Astronomy and Astrophysical Research
  • Gamma-ray bursts and supernovae
  • Astrophysics and Cosmic Phenomena
  • Adaptive optics and wavefront sensing
  • Stellar, planetary, and galactic studies

Akiyama has published extensively, with a significant number of their works appearing in notable venues. Frequent publication venues include:

  • arXiv (Cornell University)
  • The Astrophysical Journal
  • Astronomy and Astrophysics
  • Monthly Notices of the Royal Astronomical Society
  • Adaptive Optics Systems VIII

Their recent papers reflect research progress in high-redshift quasars, galaxy formation, and observational astrophysics. Some recent publications are:

  • "Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XVI. 69 New Quasars at 5.8 < z < 7.0," 2022, The Astrophysical Journal Supplement Series
  • "Quasar Luminosity Function at z = 7," 2023, The Astrophysical Journal Letters
  • "The eROSITA Final Equatorial-Depth Survey (eFEDS)," 2021, Astronomy and Astrophysics
  • "Dissecting Nearby Galaxies with piXedfit. I. Spatially Resolved Properties of Stars, Dust, and Gas as Revealed by Panchromatic SED Fitting," 2022, The Astrophysical Journal
  • "XXL-HSC: Link between AGN activity and star formation in the early Universe (z 3.5)," 2022, Astronomy and Astrophysics

Akiyama collaborates frequently with several co-authors across their publications. These frequent collaborators include:

  • Yoshiki Toba
  • Tohru Nagao
  • Yoshiki Matsuoka
  • Toshihiro Kawaguchi
  • Takuma Izumi

Best Publications

  • Cosmological evolution of the hard X-ray active galactic nucleus luminosity function and the origin of the hard X-ray background

    Yoshihiro Ueda;Masayuki Akiyama;Kouji Ohta;Takamitsu Miyaji

  • Cosmological Evolution of the Hard X-ray AGN Luminosity Function and the Origin of the Hard X-ray Background

    Yoshihiro Ueda;Masayuki Akiyama;Kouji Ohta;Takamitsu Miyaji

  • 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

  • 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

  • TOWARD THE STANDARD POPULATION SYNTHESIS MODEL OF THE X-RAY BACKGROUND: EVOLUTION OF X-RAY LUMINOSITY AND ABSORPTION FUNCTIONS OF ACTIVE GALACTIC NUCLEI INCLUDING COMPTON-THICK POPULATIONS

    Yoshihiro Ueda;Masayuki Akiyama;Guenther Hasinger;Takamitsu Miyaji;Takamitsu Miyaji

  • 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 Subaru/XMM-Newton Deep Survey (SXDS). II. Optical Imaging and Photometric Catalogs*

    Hisanori Furusawa;George Kosugi;Masayuki Akiyama;Tadafumi Takata

  • The SUBARU Deep Field Project: Lymanα Emitters at a Redshift of 6.6

    Yoshiaki Taniguchi;Masaru Ajiki;Tohru Nagao;Tohru Nagao;Yasuhiro Shioya

  • The Discovery of Primeval Large-Scale Structures with Forming Clusters at Redshift 6

    M. Ouchi;K. Shimasaku;M. Akiyama;K. Sekiguchi

  • The Discovery of Primeval Large-Scale Structures with Forming Clusters at Redshift 6*

    Masami Ouchi;Kazuhiro Shimasaku;Masayuki Akiyama;Kazuhiro Sekiguchi

  • The Discovery of Two Lyman α Emitters beyond Redshift 6 in the Subaru Deep Field

    Keiichi Kodaira;Yoshiaki Taniguchi;Nobunari Kashikawa;Norio Kaifu

  • THE COSMIC BPT DIAGRAM: CONFRONTING THEORY WITH OBSERVATIONS

    Lisa J. Kewley;Lisa J. Kewley;Christian Maier;Kiyoto Yabe;Kouji Ohta

  • Radio imaging of the Subaru/XMM-Newton Deep Field - I. The 100-microJy catalogue, optical identifications, and the nature of the faint radio source population

    Chris Simpson;Alejo Martinez-Sansigre;Steve Rawlings;Rob Ivison

  • Discovery of a Giant Lya Emitter Near the Reionization Epoch

    Masami Ouchi;Yoshiaki Ono;Eiichi Egami;Tomoki Saito

  • Radio imaging of the Subaru/XMM-Newton Deep Field - I. The 100-μJy catalogue, optical identifications, and the nature of the faint radio source population

    Chris Simpson;Chris Simpson;Alejo Martínez-Sansigre;Steve Rawlings;Rob Ivison;Rob Ivison

  • The Subaru FMOS galaxy redshift survey (FastSound). IV. New constraint on gravity theory from redshift space distortions at z ∼ 1.4

    Teppei Okumura;Chiaki Hikage;Tomonori Totani;Motonari Tonegawa

  • Great Optically Luminous Dropout Research Using Subaru HSC (GOLDRUSH). I. UV Luminosity Functions at $z \sim 4-7$ Derived with the Half-Million Dropouts on the 100 deg$^2$ Sky

    Yoshiaki Ono;Masami Ouchi;Yuichi Harikane;Jun Toshikawa

  • Down‐sizing in galaxy formation at z∼ 1 in the Subaru/XMM–Newton Deep Survey (SXDS)

    Tadayuki Kodama;Toru Yamada;Masayuki Akiyama;Kentaro Aoki

  • Cosmological Evolution of the Hard X-Ray AGN Luminosity Function

    Y. Ueda;M. Akiyama;K. Ohta;T. Miyaji

Frequent Co-Authors

Toru Yamada
Toru Yamada Japan Aerospace Exploration Agency
Tohru Nagao
Tohru Nagao Ehime University
Nobunari Kashikawa
Nobunari Kashikawa University of Tokyo
Masami Ouchi
Masami Ouchi University of Tokyo
Yoshihiro Ueda
Yoshihiro Ueda Kyoto University
Hisanori Furusawa
Hisanori Furusawa National Institutes of Natural Sciences
Satoshi Miyazaki
Satoshi Miyazaki The Graduate University for Advanced Studies, SOKENDAI
Kazuhiro Shimasaku
Kazuhiro Shimasaku University of Tokyo
Masatoshi Imanishi
Masatoshi Imanishi The Graduate University for Advanced Studies, SOKENDAI
Tadayuki Kodama
Tadayuki Kodama Tohoku University

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