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Shuichiro Hirai

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Mechanical and Aerospace Engineering 35 2668 2501 65 60 385 4710

Shuichiro Hirai publications per year

The chart shows the history of publications by Shuichiro Hirai between 1984 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Shuichiro Hirai published across 42 years, from 1984 to 2025, averaging 12.1 papers a year. Output peaked at 39 publications in 2013. 15 of the 510 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1984 to 2025. Vertical axis: number of publications, 0 to 39. Peak 39 publications in 2013. 1984: 1 publication 1985: 0 publications 1986: 1 publication 1987: 0 publications 1988: 2 publications 1989: 3 publications 1990: 0 publications 1991: 3 publications 1992: 1 publication 1993: 6 publications 1994: 1 publication 1995: 6 publications 1996: 4 publications 1997: 9 publications 1998: 6 publications 1999: 8 publications 2000: 7 publications 2001: 13 publications 2002: 4 publications 2003: 15 publications 2004: 17 publications 2005: 15 publications 2006: 20 publications 2007: 23 publications 2008: 18 publications 2009: 21 publications 2010: 25 publications 2011: 33 publications 2012: 22 publications 2013: 39 publications 2014: 21 publications 2015: 19 publications 2016: 15 publications 2017: 19 publications 2018: 17 publications 2019: 18 publications 2020: 23 publications 2021: 21 publications 2022: 10 publications 2023: 9 publications 2024: 11 publications 2025: 4 publications
1984 2025

510 publications in total across all disciplines

View publications per year as a table
Shuichiro Hirai: publications per year, 1984 to 2025
Year Publications
1984 1
1985 0
1986 1
1987 0
1988 2
1989 3
1990 0
1991 3
1992 1
1993 6
1994 1
1995 6
1996 4
1997 9
1998 6
1999 8
2000 7
2001 13
2002 4
2003 15
2004 17
2005 15
2006 20
2007 23
2008 18
2009 21
2010 25
2011 33
2012 22
2013 39
2014 21
2015 19
2016 15
2017 19
2018 17
2019 18
2020 23
2021 21
2022 10
2023 9
2024 11
2025 4
Total 510
Download as CSV

Shuichiro Hirai publications per year - data summary

  • Shuichiro Hirai, a Mechanical and Aerospace Engineering scholar from Institute of Science Tokyo, has 510 publications recorded across 42 years, from 1984 to 2025.
  • The oldest publication on record dates to 1984 and the most recent to 2025.
  • The most productive year is 2013, with 39 publications.
  • The least productive years with any output are 1984, 1986, 1992 and 1994, with 1 publication each.
  • 3 of the 42 years in the span carry no publications at all (1985, 1987 and 1990).
  • The rate of publication averages 12.1 papers per year over the whole span, or 13.1 per year counting only the 39 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 55 publications, 11% of the career total.
  • Split into equal eras - 1984-1997: 37 publications (2.6 per year); 1998-2011: 225 publications (16.1 per year); 2012-2025: 248 publications (17.7 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Shuichiro Hirai publication distribution in Mechanical and Aerospace Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mechanical and Aerospace Engineering in 2026. The highlighted bar marks where Shuichiro Hirai sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 63 bars. Horizontal axis: publications, 47–56 to 659+. Vertical axis: number of scientists, 0 to 155. Most scientists, 155, have 147–156 publications. The last bar groups every scientist with 659 publications or more. The highlighted bar, 377–386 publications, is where this scientist sits. 47–56 publications: 10 scientists 57–66 publications: 23 scientists 67–76 publications: 32 scientists 77–86 publications: 62 scientists 87–96 publications: 67 scientists 97–106 publications: 91 scientists 107–116 publications: 113 scientists 117–126 publications: 115 scientists 127–136 publications: 130 scientists 137–146 publications: 140 scientists 147–156 publications: 155 scientists 157–166 publications: 132 scientists 167–176 publications: 133 scientists 177–186 publications: 130 scientists 187–196 publications: 140 scientists 197–206 publications: 115 scientists 207–216 publications: 125 scientists 217–226 publications: 117 scientists 227–236 publications: 99 scientists 237–246 publications: 92 scientists 247–256 publications: 100 scientists 257–266 publications: 95 scientists 267–276 publications: 88 scientists 277–286 publications: 77 scientists 287–296 publications: 74 scientists 297–306 publications: 74 scientists 307–316 publications: 62 scientists 317–326 publications: 70 scientists 327–336 publications: 59 scientists 337–346 publications: 58 scientists 347–356 publications: 45 scientists 357–366 publications: 44 scientists 367–376 publications: 36 scientists 377–386 publications: 41 scientists 387–396 publications: 32 scientists 397–406 publications: 23 scientists 407–416 publications: 28 scientists 417–426 publications: 27 scientists 427–436 publications: 25 scientists 437–446 publications: 23 scientists 447–456 publications: 23 scientists 457–466 publications: 20 scientists 467–476 publications: 12 scientists 477–486 publications: 24 scientists 487–496 publications: 18 scientists 497–506 publications: 12 scientists 507–516 publications: 13 scientists 517–526 publications: 21 scientists 527–536 publications: 12 scientists 537–546 publications: 8 scientists 547–556 publications: 16 scientists 557–566 publications: 3 scientists 567–576 publications: 11 scientists 577–586 publications: 6 scientists 587–596 publications: 5 scientists 597–606 publications: 6 scientists 607–616 publications: 7 scientists 617–626 publications: 7 scientists 627–636 publications: 10 scientists 637–646 publications: 4 scientists 647–656 publications: 3 scientists 657–658 publications: 2 scientists 659+ publications: 100 scientists
47–56 publications 659+

This scientist: 385 publications — 85th percentile

85% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 659 publications or more.

View publications distribution as a table
Number of Mechanical and Aerospace Engineering scientists by publication count, Research.com 2026 ranking edition. Based on 3,445 ranked scientists.
Publications Scientists This scientist
47–56 10
57–66 23
67–76 32
77–86 62
87–96 67
97–106 91
107–116 113
117–126 115
127–136 130
137–146 140
147–156 155
157–166 132
167–176 133
177–186 130
187–196 140
197–206 115
207–216 125
217–226 117
227–236 99
237–246 92
247–256 100
257–266 95
267–276 88
277–286 77
287–296 74
297–306 74
307–316 62
317–326 70
327–336 59
337–346 58
347–356 45
357–366 44
367–376 36
377–386 41 385
387–396 32
397–406 23
407–416 28
417–426 27
427–436 25
437–446 23
447–456 23
457–466 20
467–476 12
477–486 24
487–496 18
497–506 12
507–516 13
517–526 21
527–536 12
537–546 8
547–556 16
557–566 3
567–576 11
577–586 6
587–596 5
597–606 6
607–616 7
617–626 7
627–636 10
637–646 4
647–656 3
657–658 2
659+ 100
Download as CSV

Shuichiro Hirai publication distribution in Mechanical and Aerospace Engineering in 2026 - data summary

  • The chart plots the publication count of all 3,445 Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026, grouped into 63 ranges running from 47–56 to 659+ publications.
  • Shuichiro Hirai, a Mechanical and Aerospace Engineering scholar from Institute of Science Tokyo, records 385 publications - the 85th percentile of the discipline.
  • 85% of ranked Mechanical and Aerospace Engineering scientists score the same or lower than Shuichiro Hirai, and about 15% score higher.
  • The median of the discipline falls in the 217–226 publications range, and Shuichiro Hirai ranks above the median.
  • The most crowded range is 147–156 publications, holding 155 scientists (4% of the field).
  • 46% of the field sits in the lowest quarter of the value range (up to 197–206 publications), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 659 publications or more, 100 scientists in all (3% of the field).

Shuichiro Hirai D-index placement in Mechanical and Aerospace Engineering in 2026

The chart shows the D-index (discipline H-index) distribution of Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026. The highlighted bar marks where Shuichiro Hirai sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 64 bars. Horizontal axis: D-Index, 30 to 93+. Vertical axis: number of scientists, 0 to 189. Most scientists, 189, have 34 D-Index. The last bar groups every scientist with 93 D-Index or more. The highlighted bar, 35 D-Index, is where this scientist sits. 30 D-Index: 83 scientists 31 D-Index: 113 scientists 32 D-Index: 144 scientists 33 D-Index: 153 scientists 34 D-Index: 189 scientists 35 D-Index: 158 scientists 36 D-Index: 139 scientists 37 D-Index: 127 scientists 38 D-Index: 130 scientists 39 D-Index: 126 scientists 40 D-Index: 104 scientists 41 D-Index: 100 scientists 42 D-Index: 107 scientists 43 D-Index: 101 scientists 44 D-Index: 103 scientists 45 D-Index: 79 scientists 46 D-Index: 88 scientists 47 D-Index: 70 scientists 48 D-Index: 83 scientists 49 D-Index: 44 scientists 50 D-Index: 64 scientists 51 D-Index: 56 scientists 52 D-Index: 50 scientists 53 D-Index: 48 scientists 54 D-Index: 58 scientists 55 D-Index: 52 scientists 56 D-Index: 48 scientists 57 D-Index: 42 scientists 58 D-Index: 34 scientists 59 D-Index: 42 scientists 60 D-Index: 37 scientists 61 D-Index: 42 scientists 62 D-Index: 44 scientists 63 D-Index: 22 scientists 64 D-Index: 33 scientists 65 D-Index: 29 scientists 66 D-Index: 23 scientists 67 D-Index: 29 scientists 68 D-Index: 24 scientists 69 D-Index: 19 scientists 70 D-Index: 34 scientists 71 D-Index: 26 scientists 72 D-Index: 19 scientists 73 D-Index: 18 scientists 74 D-Index: 19 scientists 75 D-Index: 14 scientists 76 D-Index: 19 scientists 77 D-Index: 8 scientists 78 D-Index: 18 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 17 scientists 82 D-Index: 11 scientists 83 D-Index: 16 scientists 84 D-Index: 7 scientists 85 D-Index: 9 scientists 86 D-Index: 8 scientists 87 D-Index: 6 scientists 88 D-Index: 6 scientists 89 D-Index: 7 scientists 90 D-Index: 10 scientists 91 D-Index: 4 scientists 92 D-Index: 4 scientists 93+ D-Index: 100 scientists
30 D-Index 93+

This scientist: 35 D-Index — 24th percentile

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

The last bar groups every scientist with 93 D-Index or more.

View D-Index distribution as a table
Number of Mechanical and Aerospace Engineering scientists by D-index, Research.com 2026 ranking edition. Based on 3,445 ranked scientists.
D-Index Scientists This scientist
30 83
31 113
32 144
33 153
34 189
35 158 35
36 139
37 127
38 130
39 126
40 104
41 100
42 107
43 101
44 103
45 79
46 88
47 70
48 83
49 44
50 64
51 56
52 50
53 48
54 58
55 52
56 48
57 42
58 34
59 42
60 37
61 42
62 44
63 22
64 33
65 29
66 23
67 29
68 24
69 19
70 34
71 26
72 19
73 18
74 19
75 14
76 19
77 8
78 18
79 16
80 12
81 17
82 11
83 16
84 7
85 9
86 8
87 6
88 6
89 7
90 10
91 4
92 4
93+ 100
Download as CSV

Shuichiro Hirai D-index placement in Mechanical and Aerospace Engineering in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 3,445 Mechanical and Aerospace Engineering scientists ranked by Research.com in 2026, grouped into 64 ranges running from 30 to 93+ D-Index.
  • Shuichiro Hirai, a Mechanical and Aerospace Engineering scholar from Institute of Science Tokyo, records 35 D-Index - the 24th percentile of the discipline.
  • 24% of ranked Mechanical and Aerospace Engineering scientists score the same or lower than Shuichiro Hirai, and about 76% score higher.
  • The median of the discipline falls in the 43 D-Index range, and Shuichiro Hirai ranks below the median.
  • The most crowded range is 34 D-Index, holding 189 scientists (5% of the field).
  • 57% of the field sits in the lowest quarter of the value range (up to 45 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 93 D-Index or more, 100 scientists in all (3% of the field).

Best Publications

  • Geological storage of carbon dioxide by residual gas and solubility trapping

    Unknown

  • Magnetic Resonance Imaging of the Water Distribution within a Polymer Electrolyte Membrane in Fuel Cells

    Unknown

  • Degradation Mechanism of PEMFC under Open Circuit Operation

    Unknown

  • Soft X-ray visualization of the liquid water transport within the cracks of micro porous layer in PEMFC

    Unknown

  • Inertial flow structures in a simple‐packed bed of spheres

    Unknown

  • In-situ visualization of liquid water in an operating PEMFC by soft X-ray radiography

    Unknown

  • Effects of Nafion® ionomer and carbon particles on structure formation in a proton-exchange membrane fuel cell catalyst layer fabricated by the decal-transfer method

    Unknown

  • Water diffusion measurement in fuel-cell SPE membrane by NMR

    Unknown

  • Observation of dynamic liquid water transport in the microporous layer and gas diffusion layer of an operating PEM fuel cell by high-resolution soft X-ray radiography

    Unknown

  • Analysis of Water Transport in PEFCs by Magnetic Resonance Imaging Measurement

    Unknown

  • In situ Diagnostics for Water Transport in Proton Exchange Membrane Fuel Cells

    Unknown

  • Effect of liquid water distribution in gas diffusion media with and without microporous layer on PEM fuel cell performance

    Unknown

  • Behavior of supercritical CO2 injected into porous media containing water

    Unknown

  • Investigation on the effect of microstructure of proton exchange membrane fuel cell porous layers on liquid water behavior by soft X-ray radiography

    Unknown

  • Water content distribution in a polymer electrolyte membrane for advanced fuel cell system with liquid water supply.

    Unknown

  • Predictions of the Laminarization Phenomena in an Axially Rotating Pipe Flow

    Unknown

  • MRI Measurement of Hydrate Growth and an Application to Advanced CO2 Sequestration Technology

    Unknown

  • Measurement of CO2 diffusion coefficient and application of LIF in pressurized water

    Unknown

  • Dissolution rate of liquid CO2 in pressurized water flows and the effect of clathrate films

    Unknown

  • Measurement of liquid water content in cathode gas diffusion electrode of polymer electrolyte fuel cell

    Unknown

Frequent Co-Authors

Ryoji Kanno
Ryoji Kanno Tokyo Institute of Technology
Kentaro Uesugi
Kentaro Uesugi Stanford University
Sirivatch Shimpalee
Sirivatch Shimpalee University of South Carolina
Iryna V. Zenyuk
Iryna V. Zenyuk University of California, Irvine

External Links

Personal website of Shuichiro Hirai

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Best Scientists Citing Shuichiro Hirai

Ingo Manke

Ingo Manke

Helmholtz-Zentrum Berlin für Materialien und Energie

Publications: 32

Yongchen Song

Yongchen Song

Dalian University of Technology

Publications: 30

Aimy Bazylak

Aimy Bazylak

University of Toronto

Publications: 25

Stefan Iglauer

Stefan Iglauer

Edith Cowan University

Publications: 25

John Banhart

John Banhart

Helmholtz-Zentrum Berlin für Materialien und Energie

Publications: 21

Joachim Scholta

Joachim Scholta

Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg

Publications: 20

Werner Lehnert

Werner Lehnert

RWTH Aachen University

Publications: 18

Martin J. Blunt

Martin J. Blunt

Imperial College London

Publications: 18

Mingjun Yang

Mingjun Yang

Dalian University of Technology

Publications: 17

Haijiang Wang

Haijiang Wang

Southern University of Science and Technology

Publications: 17

Yu Liu

Yu Liu

University of Electronic Science and Technology of China

Publications: 15

Masahiro Watanabe

Masahiro Watanabe

University of Yamanashi

Publications: 14

Dan J. L. Brett

Dan J. L. Brett

University College London

Publications: 14

Adam Z. Weber

Adam Z. Weber

Lawrence Berkeley National Laboratory

Publications: 13

Paul R. Shearing

Paul R. Shearing

University College London

Publications: 13

Kui Jiao

Kui Jiao

Tianjin University

Publications: 12

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