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Takehiro Koyaguchi

Takehiro Koyaguchi

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 39 6295 5836 173 162 123 4502

Takehiro Koyaguchi publications per year

The chart shows the history of publications by Takehiro Koyaguchi between 1980 and 2023, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Takehiro Koyaguchi published across 44 years, from 1980 to 2023, averaging 2.9 papers a year. Output peaked at 10 publications in 2010. 6 of the 128 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1980 to 2023. Vertical axis: number of publications, 0 to 10. Peak 10 publications in 2010. 1980: 1 publication 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 5 publications 1985: 1 publication 1986: 4 publications 1987: 1 publication 1988: 0 publications 1989: 4 publications 1990: 3 publications 1991: 2 publications 1992: 1 publication 1993: 5 publications 1994: 3 publications 1995: 0 publications 1996: 2 publications 1997: 1 publication 1998: 0 publications 1999: 4 publications 2000: 2 publications 2001: 4 publications 2002: 1 publication 2003: 0 publications 2004: 4 publications 2005: 6 publications 2006: 0 publications 2007: 2 publications 2008: 2 publications 2009: 4 publications 2010: 10 publications 2011: 1 publication 2012: 5 publications 2013: 2 publications 2014: 6 publications 2015: 7 publications 2016: 6 publications 2017: 5 publications 2018: 8 publications 2019: 7 publications 2020: 2 publications 2021: 1 publication 2022: 2 publications 2023: 4 publications
1980 2023

128 publications in total across all disciplines

View publications per year as a table
Takehiro Koyaguchi: publications per year, 1980 to 2023
Year Publications
1980 1
1981 0
1982 0
1983 0
1984 5
1985 1
1986 4
1987 1
1988 0
1989 4
1990 3
1991 2
1992 1
1993 5
1994 3
1995 0
1996 2
1997 1
1998 0
1999 4
2000 2
2001 4
2002 1
2003 0
2004 4
2005 6
2006 0
2007 2
2008 2
2009 4
2010 10
2011 1
2012 5
2013 2
2014 6
2015 7
2016 6
2017 5
2018 8
2019 7
2020 2
2021 1
2022 2
2023 4
Total 128
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Takehiro Koyaguchi publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Takehiro Koyaguchi sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 118–127 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 123 publications — 24th percentile

24% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484
118–127 540 123
128–137 557
138–147 491
148–157 495
158–167 458
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Takehiro Koyaguchi D-index placement in Earth Science in 2026

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

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 39 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 39 D-Index — 35th percentile

35% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344
39 349 39
40 296
41 289
42 277
43 279
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

Takehiro Koyaguchi is a researcher affiliated with the University of Tokyo in Japan. Their work primarily spans the fields of Earth and Planetary Sciences and Engineering, with a particular focus on geophysics, atmospheric science, earth-surface processes, computational mechanics, and ocean engineering.

The research topics covered by Koyaguchi include earthquake and tectonic studies, geological and geochemical analysis, meteorological phenomena and simulations, geological formations and processes, geology and paleoclimatology research, fluid dynamics and turbulent flows, as well as particle dynamics in fluid flows.

Koyaguchi's recent papers are published in a range of journals, highlighting an emphasis on volcanic activity, fluid dynamics, and associated geophysical phenomena. Selected publications include:

  • Validation of a two-layer depth-averaged model by comparison with an experimental dilute stratified pyroclastic density current, 2021, Bulletin of Volcanology
  • Dynamics and Deposits of Pyroclastic Density Currents in Magmatic and Phreatomagmatic Eruptions Revealed by a Two-Layer Depth-Averaged Model, 2023, Geophysical Research Letters
  • Constraints on magma storage conditions based on geodetic volume change and erupted magma volume and application to the 2011 and 2018 eruptions at Kirishima Shinmoe-dake volcano, Japan, 2023, Earth Planets and Space
  • Control of Vent Geometry on the Fluid Dynamics of Volcanic Plumes: Insights From Numerical Simulations, 2020, Geophysical Research Letters
  • Dynamics of gas-driven eruption on Ceres as a probe to its interior, 2023, Icarus

The frequent co-authors collaborating with Koyaguchi include Yujiro Suzuki, Hiroyuki A. Shimizu, Kensuke Ishii, Akira Nishijo, and Tomofumi Kozono. These collaborations indicate active engagement with researchers specializing in geophysics and related areas within Earth and Planetary Sciences.

Koyaguchi's work appears regularly in several prominent scientific venues. The most frequent publication outlets include:

  • Geophysical Research Letters
  • Earth Planets and Space
  • Bulletin of Volcanology
  • Icarus
  • Journal of Applied Volcanology

Best Publications

  • Transitions between explosive and effusive eruptions of silicic magmas

    Andrew W. Woods;Takehiro Koyaguchi

  • Magma mixing in a conduit

    Takehiro Koyaguchi

  • CHARGE MEASUREMENTS ON PARTICLE FALLOUT FROM A VOLCANIC PLUME

    Jennifer Gilbert;Stephen Lane;Rsj Sparks;T Koyaguchi

  • On the formation of eruption columns following explosive mixing of magma and surface‐water

    Takehiro Koyaguchi;Andrew W. Woods

  • A numerical study of turbulent mixing in eruption clouds using a three-dimensional fluid dynamics model

    Yujiro J. Suzuki;Takehiro Koyaguchi;Masaki Ogawa;Izumi Hachisu

  • Magma discharge variations during the 2011 eruptions of Shinmoe-dake volcano, Japan, revealed by geodetic and satellite observations

    Tomofumi Kozono;Hideki Ueda;Taku Ozawa;Takehiro Koyaguchi

  • Measurements of electric charge distribution in volcanic plumes at Sakurajima Volcano, Japan

    Toshiro Miura;Takehiro Koyaguchi;Yoshikazu Tanaka

  • A Two-stage Thermal Evolution Model of Magmas in Continental Crust

    Takehiro Koyaguchi;Katsuya Kaneko

  • Textural and compositional evidence for magma mixing and its mechanism, Abu volcano group, southwestern Japan

    Takehiro Koyaguchi

  • Tectonic stress controls on ascent and emplacement of magmas

    Tohru Watanabe;Takehiro Koyaguchi;Tetsuzo Seno

  • Mixing of stratified liquids by the motion of gas bubbles: application to magma mixing

    Nathalie Thomas;Stephen Tait;Takehiro Koyaguchi

  • Evidence for two-stage mixing in magmatic inclusions and rhyolitic lava domes on Niijima Island, Japan

    Takehiro Koyaguchi

  • A three‐dimensional numerical simulation of spreading umbrella clouds

    Y. J. Suzuki;T. Koyaguchi

  • Sedimentation of particles from a convecting fluid

    Takehiro Koyaguchi;Takehiro Koyaguchi;Mark A. Hallworth;Herbert E. Huppert;R. Stephen J. Sparks

  • Origin of modal and rhythmic igneous layering by sedimentation in a convecting magma chamber

    Rsj Sparks;HE Huppert;T Koyaguchi;MA Hallworth

  • Origin of the giant eruption cloud of Pinatubo, June 15, 1991

    Takehiro Koyaguchi;Masami Tokuno

  • Repeated large-scale eruptions from a single compositionally stratified magma chamber: An example from Aso volcano, Southwest Japan

    Katsuya Kaneko;Hiroki Kamata;Takehiro Koyaguchi;Masako Yoshikawa;Masako Yoshikawa

  • The effect of magma flow on nucleation of gas bubbles in a volcanic conduit

    Hélène Massol;Takehiro Koyaguchi

  • The dynamics of magma mixing in a rising magma batch

    Takehiro Koyaguchi;Stephen Blake

  • Reconstruction of eruption column dynamics on the basis of grain size of tephra fall deposits: 2. Application to the Pinatubo 1991 eruption

    Takehiro Koyaguchi;Marekazu Ohno

  • Magma mixing in mantle xenolith-bearing calc-alkalic ejecta, ichinomegata volcano, Northeastern Japan

    M. Sakuyama;T. Koyaguchi

Frequent Co-Authors

Antonio Costa
Antonio Costa National Institute of Geophysics and Volcanology
Herbert E. Huppert
Herbert E. Huppert University of Cambridge
Andrew W. Woods
Andrew W. Woods University of Cambridge
Heidy M Mader
Heidy M Mader University of Bristol
Stephen Blake
Stephen Blake The Open University
Shigeo Yoshida
Shigeo Yoshida Kurume University
Agust Gudmundsson
Agust Gudmundsson Royal Holloway University of London
Michael Manga
Michael Manga University of California, Berkeley
Tetsuzo Seno
Tetsuzo Seno University of Tokyo
Costanza Bonadonna
Costanza Bonadonna University of Geneva

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