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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Engineering and Technology 60 2255 2153 26 24 499 10452

Hiromasa Ito publications per year

The chart shows the history of publications by Hiromasa Ito between 1969 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Hiromasa Ito published across 57 years, from 1969 to 2025, averaging 9.4 papers a year. Output peaked at 44 publications in 2001. 9 of the 537 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1969 to 2025. Vertical axis: number of publications, 0 to 44. Peak 44 publications in 2001. 1969: 1 publication 1970: 0 publications 1971: 0 publications 1972: 1 publication 1973: 1 publication 1974: 1 publication 1975: 3 publications 1976: 1 publication 1977: 0 publications 1978: 1 publication 1979: 3 publications 1980: 3 publications 1981: 5 publications 1982: 5 publications 1983: 6 publications 1984: 19 publications 1985: 8 publications 1986: 2 publications 1987: 3 publications 1988: 3 publications 1989: 2 publications 1990: 2 publications 1991: 1 publication 1992: 2 publications 1993: 4 publications 1994: 0 publications 1995: 10 publications 1996: 8 publications 1997: 9 publications 1998: 15 publications 1999: 17 publications 2000: 23 publications 2001: 44 publications 2002: 30 publications 2003: 25 publications 2004: 26 publications 2005: 30 publications 2006: 36 publications 2007: 42 publications 2008: 15 publications 2009: 29 publications 2010: 25 publications 2011: 14 publications 2012: 11 publications 2013: 4 publications 2014: 5 publications 2015: 4 publications 2016: 3 publications 2017: 4 publications 2018: 7 publications 2019: 2 publications 2020: 5 publications 2021: 4 publications 2022: 1 publication 2023: 3 publications 2024: 2 publications 2025: 7 publications
1969 2025

537 publications in total across all disciplines

View publications per year as a table
Hiromasa Ito: publications per year, 1969 to 2025
Year Publications
1969 1
1970 0
1971 0
1972 1
1973 1
1974 1
1975 3
1976 1
1977 0
1978 1
1979 3
1980 3
1981 5
1982 5
1983 6
1984 19
1985 8
1986 2
1987 3
1988 3
1989 2
1990 2
1991 1
1992 2
1993 4
1994 0
1995 10
1996 8
1997 9
1998 15
1999 17
2000 23
2001 44
2002 30
2003 25
2004 26
2005 30
2006 36
2007 42
2008 15
2009 29
2010 25
2011 14
2012 11
2013 4
2014 5
2015 4
2016 3
2017 4
2018 7
2019 2
2020 5
2021 4
2022 1
2023 3
2024 2
2025 7
Total 537
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Hiromasa Ito publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where Hiromasa Ito sits on this spectrum.

No. of scientists
100 200 300 400
Bar chart with 78 bars. Horizontal axis: publications, 38–47 to 804+. Vertical axis: number of scientists, 0 to 457. Most scientists, 457, have 148–157 publications. The last bar groups every scientist with 804 publications or more. The highlighted bar, 498–507 publications, is where this scientist sits. 38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 135 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 118 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 60 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38–47 publications 804+

This scientist: 499 publications — 94th percentile

94% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

View publications distribution as a table
Number of Engineering and Technology scientists by publication count, Research.com 2026 ranking edition. Based on 9,796 ranked scientists.
Publications Scientists This scientist
38–47 20
48–57 35
58–67 96
68–77 135
78–87 190
88–97 259
98–107 283
108–117 369
118–127 341
128–137 386
138–147 372
148–157 457
158–167 415
168–177 407
178–187 421
188–197 378
198–207 403
208–217 317
218–227 346
228–237 321
238–247 260
248–257 280
258–267 240
268–277 214
278–287 242
288–297 203
298–307 166
308–317 154
318–327 175
328–337 159
338–347 99
348–357 131
358–367 106
368–377 118
378–387 97
388–397 108
398–407 82
408–417 71
418–427 64
428–437 55
438–447 54
448–457 60
458–467 47
468–477 40
478–487 30
488–497 29
498–507 38 499
508–517 40
518–527 32
528–537 23
538–547 28
548–557 23
558–567 19
568–577 16
578–587 17
588–597 18
598–607 22
608–617 15
618–627 9
628–637 11
638–647 21
648–657 12
658–667 9
668–677 11
678–687 9
688–697 6
698–707 14
708–717 7
718–727 8
728–737 10
738–747 9
748–757 5
758–767 5
768–777 11
778–787 7
788–797 2
798–803 4
804+ 100
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Hiromasa Ito D-index placement in Engineering and Technology in 2026

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

No. of scientists
100 200 300 400
Bar chart with 78 bars. Horizontal axis: D-Index, 30 to 107+. Vertical axis: number of scientists, 0 to 426. Most scientists, 426, have 42 D-Index. The last bar groups every scientist with 107 D-Index or more. The highlighted bar, 60 D-Index, is where this scientist sits. 30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 129 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 348 scientists 41 D-Index: 362 scientists 42 D-Index: 426 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 95 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 25 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 60 D-Index — 78th percentile

78% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

View D-Index distribution as a table
Number of Engineering and Technology scientists by D-index, Research.com 2026 ranking edition. Based on 9,796 ranked scientists.
D-Index Scientists This scientist
30 59
31 114
32 129
33 189
34 200
35 262
36 311
37 312
38 350
39 385
40 348
41 362
42 426
43 380
44 310
45 341
46 301
47 306
48 271
49 246
50 210
51 253
52 213
53 221
54 195
55 186
56 170
57 167
58 166
59 144
60 152 60
61 141
62 138
63 131
64 118
65 114
66 119
67 95
68 87
69 77
70 89
71 69
72 54
73 46
74 55
75 54
76 49
77 53
78 46
79 28
80 39
81 36
82 24
83 26
84 36
85 18
86 25
87 19
88 26
89 27
90 23
91 15
92 12
93 9
94 15
95 10
96 13
97 13
98 9
99 7
100 7
101 8
102 7
103 7
104 9
105 6
106 9
107+ 99
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Overview

Hiromasa Ito is affiliated with the RIKEN Center for Advanced Photonics in Japan. Their research spans multiple fields, primarily medicine and engineering, with a strong focus on areas intersecting clinical and technological disciplines.

Their recent scholarly contributions include:

  • Prognostic impact of the timing of antihypertensive medication initiation for hypertension detected at health screening on primary prevention of adverse cardiovascular events: Age-stratified real-world data analysis (2025), Hypertension Research
  • Assessing the performance of zero-shot visual question answering in multimodal large language models for 12-lead ECG image interpretation (2025), Frontiers in Cardiovascular Medicine

Hiromasa Ito's research integrates topics from clinical outcomes to advanced technological applications. The main topics evident across publications include:

  • Cardiac, Anesthesia and Surgical Outcomes
  • Hemodynamic Monitoring and Therapy
  • Terahertz technology and applications
  • Photonic and Optical Devices
  • Blood Pressure and Hypertension Studies
  • Health Systems, Economic Evaluations, Quality of Life
  • Semiconductor Quantum Structures and Devices

Their work is published in journals frequently associated with cardiovascular and interdisciplinary biomedical research, notably:

  • Scientific Reports
  • Circulation Journal
  • Frontiers in Cardiovascular Medicine
  • Hypertension Research
  • IEEE Transactions on Human-Machine Systems

Collaborations have been a significant aspect of their research activity, with frequent co-authors including Yoshimasa Kawazoe, Yu Akagi, Toru Takiguchi, Kazuhiko Ohe, and Kazumi Kubota. Each of these collaborators has partnered on multiple publications, establishing a network of expertise across clinical and engineering domains.

Their subfields of study emphasize surgical methodologies and engineering innovations, comprising:

  • Surgery
  • Electrical and Electronic Engineering
  • Cardiology and Cardiovascular Medicine
  • Pulmonary and Respiratory Medicine
  • Economics and Econometrics

Hiromasa Ito's multidisciplinary approach bridges medical sciences with technological advances, focusing on health outcome optimization and the integration of novel photonic and electronic modalities in clinical settings.

Best Publications

  • COHERENT TUNABLE THZ-WAVE GENERATION FROM LINBO3 WITH MONOLITHIC GRATING COUPLER

    Kodo Kawase;Manabu Sato;Tetsuo Taniuchi;Hiromasa Ito

  • Terahertz wave parametric source

    Kodo Kawase;Jun-ichi Shikata;Hiromasa Ito

  • Terahertz-wave surface-emitted difference frequency generation in slant-stripe-type periodically poled LiNbO3 crystal

    Yuzo Sasaki;Avetisyan Yuri;Kodo Kawase;Hiromasa Ito

  • Difference-frequency terahertz-wave generation from 4-dimethylamino-N-methyl-4-stilbazolium-tosylate by use of an electronically tuned Ti:sapphire laser.

    K. Kawase;M. Mizuno;S. Sohma;H. Takahashi

  • Fabrication of periodic domain grating in LiNbO3 by electron beam writing for application of nonlinear optical processes

    H. Ito;C. Takyu;H. Inaba

  • Tunable terahertz-wave generation from DAST crystal by dual signal-wave parametric oscillation of periodically poled lithium niobate.

    Kodo Kawase;Takaaki Hatanaka;Hidenori Takahashi;Koichiro Nakamura

  • Transform-limited, narrow-linewidth, terahertz-wave parametric generator

    Kodo Kawase;Jun-ichi Shikata;Kazuhiro Imai;Hiromasa Ito

  • Quasi-phase-matched optical parametric oscillation with periodically poled stoichiometric LiTaO(3).

    Takaaki Hatanaka;Koichiro Nakamura;Tetsuo Taniuchi;Hiromasa Ito

  • Component spatial pattern analysis of chemicals using terahertz spectroscopic imaging

    Y. Watanabe;K. Kawase;T. Ikari;H. Ito

  • Unidirectional radiation of widely tunable THz wave using a prism coupler under noncollinear phase matching condition

    Kodo Kawase;Manabu Sato;Koichiro Nakamura;Tetsuo Taniuchi

  • Arrayed silicon prism coupler for a terahertz-wave parametric oscillator.

    Kodo Kawase;Jun-ichi Shikata;Hiroaki Minamide;Kazuhiro Imai

  • Enhancement of terahertz-wave output from LiNbO 3 optical parametric oscillators by cryogenic cooling

    Jun Ichi Shikata;Manabu Sato;Tetsuo Taniuchi;Hiromasa Ito

  • Powerful red-green-blue laser source pumped with a mode-locked thin disk laser.

    Felix Brunner;Edith Innerhofer;Sergio V. Marchese;Thomas Südmeyer

  • Far-infrared properties of DAST.

    Markus Walther;Kasper Jensby;Søren Rud Keiding;Hidenori Takahashi

  • Injection-seeded terahertz-wave parametric generator with wide tunability

    Kodo Kawase;Hiroaki Minamide;Kazuhiro Imai;Jun-ichi Shikata

  • Generalized study on angular dependence of induced second‐order nonlinear optical polarizations and phase matching in biaxial crystals

    Hiromasa Ito;Hatsuhiko Naito;Humio Inaba

  • THz-wave parametric oscillator with a surface-emitted configuration.

    Tomofumi Ikari;Xianbin Zhang;Hiroaki Minamide;Hiromasa Ito

  • Liquid-crystal microlens with a beam-steering function.

    Shin Masuda;Sounosuke Takahashi;Toshiaki Nose;Susumu Sato

  • Random Frequency Accessible Broad Tunable Terahertz-Wave Source Using Phase-Matched 4-Dimethylamino-N-methyl-4-stilbazolium Tosylate Crystal

    Hiromasa Ito;Koji Suizu;Tomoyu Yamashita;Akira Nawahara

  • Terahertz-wave near-field imaging with subwavelength resolution using surface-wave-assisted bow-tie aperture

    Kunihiko Ishihara;Keishi Ohashi;Tomofumi Ikari;Hiroaki Minamide

  • Component Spatial Pattern Analysis of Chemicals Using Terahertz Spectroscopic Imaging

    Kodo Kawase;Yuuki Watanabe;Yuichi Ogawa;Hiromasa Ito

Frequent Co-Authors

Kodo Kawase
Kodo Kawase Nagoya University
Taiichi Otsuji
Taiichi Otsuji Tohoku University
Ming Tang
Ming Tang Huazhong University of Science and Technology
Kenji Kitamura
Kenji Kitamura National Institute for Materials Science
Hideki Hashimoto
Hideki Hashimoto Kwansei Gakuin University
Satoshi Wada
Satoshi Wada University of Yamanashi
Sunao Kurimura
Sunao Kurimura National Institute for Materials Science
Wojciech Knap
Wojciech Knap Warsaw University of Technology
Jun-ichi Nishizawa
Jun-ichi Nishizawa Tohoku University

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