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Masahiro Hiraoka

Masahiro Hiraoka

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Medicine 91 11706 11011 345 327 982 32416

Masahiro Hiraoka publications per year

The chart shows the history of publications by Masahiro Hiraoka between 1979 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Masahiro Hiraoka published across 47 years, from 1979 to 2025, averaging 21.8 papers a year. Output peaked at 53 publications in 2014. 4 of the 1,025 publications appeared in the last two years.

No. of publications
10 20 30 40 50
Bar chart. Horizontal axis: year, 1979 to 2025. Vertical axis: number of publications, 0 to 53. Peak 53 publications in 2014. 1979: 1 publication 1980: 0 publications 1981: 1 publication 1982: 0 publications 1983: 5 publications 1984: 3 publications 1985: 5 publications 1986: 9 publications 1987: 9 publications 1988: 5 publications 1989: 6 publications 1990: 18 publications 1991: 9 publications 1992: 8 publications 1993: 19 publications 1994: 20 publications 1995: 26 publications 1996: 34 publications 1997: 32 publications 1998: 27 publications 1999: 32 publications 2000: 28 publications 2001: 38 publications 2002: 30 publications 2003: 31 publications 2004: 37 publications 2005: 26 publications 2006: 43 publications 2007: 34 publications 2008: 32 publications 2009: 42 publications 2010: 43 publications 2011: 37 publications 2012: 50 publications 2013: 40 publications 2014: 53 publications 2015: 45 publications 2016: 45 publications 2017: 37 publications 2018: 20 publications 2019: 8 publications 2020: 7 publications 2021: 5 publications 2022: 4 publications 2023: 17 publications 2024: 1 publication 2025: 3 publications
1979 2025

1,025 publications in total across all disciplines

View publications per year as a table
Masahiro Hiraoka: publications per year, 1979 to 2025
Year Publications
1979 1
1980 0
1981 1
1982 0
1983 5
1984 3
1985 5
1986 9
1987 9
1988 5
1989 6
1990 18
1991 9
1992 8
1993 19
1994 20
1995 26
1996 34
1997 32
1998 27
1999 32
2000 28
2001 38
2002 30
2003 31
2004 37
2005 26
2006 43
2007 34
2008 32
2009 42
2010 43
2011 37
2012 50
2013 40
2014 53
2015 45
2016 45
2017 37
2018 20
2019 8
2020 7
2021 5
2022 4
2023 17
2024 1
2025 3
Total 1,025
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Masahiro Hiraoka publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Masahiro Hiraoka sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 86 bars. Horizontal axis: publications, 101–120 to 1,796+. Vertical axis: number of scientists, 0 to 922. Most scientists, 922, have 341–360 publications. The last bar groups every scientist with 1,796 publications or more. The highlighted bar, 981–1,000 publications, is where this scientist sits. 101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 610 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101–120 publications 1,796+

This scientist: 982 publications — 94th percentile

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

The last bar groups every scientist with 1,796 publications or more.

View publications distribution as a table
Number of Medicine scientists by publication count, Research.com 2026 ranking edition. Based on 20,134 ranked scientists.
Publications Scientists This scientist
101–120 5
121–140 26
141–160 73
161–180 155
181–200 230
201–220 363
221–240 487
241–260 545
261–280 722
281–300 768
301–320 834
321–340 895
341–360 922
361–380 838
381–400 861
401–420 918
421–440 806
441–460 771
461–480 751
481–500 713
501–520 617
521–540 610
541–560 537
561–580 504
581–600 509
601–620 396
621–640 386
641–660 371
661–680 340
681–700 336
701–720 307
721–740 259
741–760 230
761–780 228
781–800 217
801–820 204
821–840 186
841–860 177
861–880 155
881–900 139
901–920 145
921–940 116
941–960 133
961–980 91
981–1,000 96 982
1,001–1,020 77
1,021–1,040 70
1,041–1,060 63
1,061–1,080 77
1,081–1,100 49
1,101–1,120 54
1,121–1,140 49
1,141–1,160 51
1,161–1,180 35
1,181–1,200 39
1,201–1,220 26
1,221–1,240 37
1,241–1,260 36
1,261–1,280 27
1,281–1,300 32
1,301–1,320 28
1,321–1,340 17
1,341–1,360 30
1,361–1,380 28
1,381–1,400 17
1,401–1,420 21
1,421–1,440 15
1,441–1,460 12
1,461–1,480 12
1,481–1,500 18
1,501–1,520 14
1,521–1,540 17
1,541–1,560 15
1,561–1,580 6
1,581–1,600 2
1,601–1,620 12
1,621–1,640 11
1,641–1,660 8
1,661–1,680 5
1,681–1,700 5
1,701–1,720 10
1,721–1,740 12
1,741–1,760 14
1,761–1,780 6
1,781–1,795 5
1,796+ 100
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Masahiro Hiraoka D-index placement in Medicine in 2026

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

No. of scientists
250 500 750 1,000
Bar chart with 75 bars. Horizontal axis: D-Index, 70–71 to 217+. Vertical axis: number of scientists, 0 to 1,027. Most scientists, 1,027, have 82–83 D-Index. The last bar groups every scientist with 217 D-Index or more. The highlighted bar, 90–91 D-Index, is where this scientist sits. 70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 399 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70–71 D-Index 217+

This scientist: 91 D-Index — 43rd percentile

43% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

View D-Index distribution as a table
Number of Medicine scientists by D-index, Research.com 2026 ranking edition. Based on 20,134 ranked scientists.
D-Index Scientists This scientist
70–71 226
72–73 391
74–75 574
76–77 730
78–79 891
80–81 972
82–83 1,027
84–85 1,003
86–87 960
88–89 970
90–91 922 91
92–93 839
94–95 808
96–97 779
98–99 668
100–101 611
102–103 630
104–105 513
106–107 541
108–109 445
110–111 429
112–113 399
114–115 393
116–117 318
118–119 302
120–121 287
122–123 255
124–125 256
126–127 252
128–129 230
130–131 179
132–133 168
134–135 163
136–137 159
138–139 134
140–141 134
142–143 118
144–145 109
146–147 106
148–149 74
150–151 79
152–153 80
154–155 87
156–157 57
158–159 74
160–161 69
162–163 60
164–165 53
166–167 39
168–169 42
170–171 32
172–173 39
174–175 40
176–177 28
178–179 19
180–181 23
182–183 31
184–185 18
186–187 20
188–189 22
190–191 13
192–193 21
194–195 12
196–197 12
198–199 14
200–201 15
202–203 13
204–205 10
206–207 8
208–209 4
210–211 12
212–213 11
214–215 10
216 4
217+ 98
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Overview

Masahiro Hiraoka is affiliated with Kyoto University in Japan and conducts research primarily in the field of Medicine. Their work spans several subfields, including Pulmonary and Respiratory Medicine, Radiation, Radiology, Nuclear Medicine and Imaging, Oncology, and Otorhinolaryngology.

The scientist's research topics cover a range of areas such as Advanced Radiotherapy Techniques, Lung Cancer Diagnosis and Treatment, Head and Neck Cancer Studies, Medical Imaging Techniques and Applications, Hepatocellular Carcinoma Treatment and Prognosis, Pancreatic and Hepatic Oncology Research, and Radiation Therapy and Dosimetry.

Recent papers authored or co-authored by Masahiro Hiraoka include:

  • A phase II study of adaptive two-step intensity-modulated radiation therapy (IMRT) with chemotherapy for loco-regionally advanced nasopharyngeal cancer (JCOG1015), 2020, International Journal of Clinical Oncology
  • The gimbaled-head radiotherapy system: Rise and downfall of a dedicated system for dynamic tumor tracking with real-time monitoring and dynamic WaveArc, 2020, Radiotherapy and Oncology
  • Organs-at-risk dose constraints in head and neck intensity-modulated radiation therapy using a dataset from a multi-institutional clinical trial (JCOG1015A1), 2022, Radiation Oncology
  • Multi-institutional phase II study on the safety and efficacy of dynamic tumor tracking-stereotactic body radiotherapy for lung tumors, 2022, Radiotherapy and Oncology
  • Influence of chemoradiotherapy on nutritional status in locally advanced rectal cancer: Prospective multicenter study, 2020, Nutrition

Frequent co-authors include:

  • Takashi Mizowaki (17 joint publications)
  • Michio Yoshimura (12 joint publications)
  • Mitsuhiro Nakamura (12 joint publications)
  • Yukinori Matsuo (11 joint publications)
  • Katsuyuki Karasawa (9 joint publications)

Masahiro Hiraoka's publications are frequently found in several specialized journals, including:

  • International Journal of Radiation Oncology*Biology*Physics (4 publications)
  • International Journal of Clinical Oncology (2 publications)
  • Radiotherapy and Oncology (2 publications)
  • Radiation Oncology (2 publications)
  • Research Square (2 publications)

Best Publications

  • Hypofractionated stereotactic radiotherapy (HypoFXSRT) for stage I non-small cell lung cancer: updated results of 257 patients in a Japanese multi-institutional study.

    Hiroshi Onishi;Hiroki Shirato;Yasushi Nagata;Masahiro Hiraoka

  • Stereotactic hypofractionated high-dose irradiation for stage I nonsmall cell lung carcinoma: clinical outcomes in 245 subjects in a Japanese multiinstitutional study.

    Hiroshi Onishi;Tsutomu Araki;Hiroki Shirato;Yasushi Nagata

  • Correction: Corrigendum: Cancer cells that survive radiation therapy acquire HIF-1 activity and translocate toward tumour blood vessels

    Hiroshi Harada;Masahiro Inoue;Satoshi Itasaka;Kiichi Hirota

  • Thyroid gland tumor diagnosis at US elastography

    Andrej Lyshchik;Tatsuya Higashi;Ryo Asato;Shinzo Tanaka

  • Clinical outcomes of a phase I/II study of 48 Gy of stereotactic body radiotherapy in 4 fractions for primary lung cancer using a stereotactic body frame

    Yasushi Nagata;Kenji Takayama;Yukinori Matsuo;Yoshiki Norihisa

  • Stereotactic body radiotherapy (SBRT) for operable Stage i non-small-cell lung cancer: Can SBRT be comparable to surgery?

    Hiroshi Onishi;Hiroki Shirato;Yasushi Nagata;Masahiro Hiraoka

  • Tumor hypoxia : A target for selective cancer therapy

    Shinae Kizaka-Kondoh;Masahiro Inoue;Hiroshi Harada;Masahiro Hiraoka

  • Prospective Trial of Stereotactic Body Radiation Therapy for Both Operable and Inoperable T1N0M0 Non-Small Cell Lung Cancer: Japan Clinical Oncology Group Study JCOG0403.

    Yasushi Nagata;Masahiro Hiraoka;Taro Shibata;Hiroshi Onishi

  • Clinical outcomes of 3D conformal hypofractionated single high-dose radiotherapy for one or two lung tumors using a stereotactic body frame

    Yasushi Nagata;Yoshiharu Negoro;Tetsuya Aoki;Takashi Mizowaki

  • Cervical Lymph Node Metastases: Diagnosis at Sonoelastography—Initial Experience

    Andrej Lyshchik;Andrej Lyshchik;Tatsuya Higashi;Ryo Asato;Shinzo Tanaka

  • The effectiveness of an immobilization device in conformal radiotherapy for lung tumor: reduction of respiratory tumor movement and evaluation of the daily setup accuracy

    Yoshiharu Negoro;Yasushi Nagata;Tetsuya Aoki;Takashi Mizowaki

  • Development of a four-dimensional image-guided radiotherapy system with a gimbaled X-ray head

    Yuichiro Kamino;Kenji Takayama;Kenji Takayama;Masaki Kokubo;Yuichiro Narita

  • Hypoxia and Hypoxia-Inducible Factor-1 Expression Enhance Osteolytic Bone Metastases of Breast Cancer

    Toru Hiraga;Shinae Kizaka-Kondoh;Kiichi Hirota;Masahiro Hiraoka

  • Multi-institutional studies on hyperthermia using an 8-MHz radiofrequency capacitive heating device (Thermotron RF-8) in combination with radiation for cancer therapy.

    Mitsuyuki Abe;Masahiro Hiraoka;Masaji Takahashi;Sunao Egawa

  • Stereotactic body radiotherapy for oligometastatic lung tumors.

    Yoshiki Norihisa;Yasushi Nagata;Kenji Takayama;Yukinori Matsuo

  • UCHL1 provides diagnostic and antimetastatic strategies due to its deubiquitinating effect on HIF-1α

    Yoko Goto;Lihua Zeng;Chan Joo Yeom;Yuxi Zhu

  • Dose-volume metrics associated with radiation pneumonitis after stereotactic body radiation therapy for lung cancer.

    Yukinori Matsuo;Keiko Shibuya;Mitsuhiro Nakamura;Masaru Narabayashi

  • Regulatory mechanisms of hypoxia-inducible factor 1 activity: Two decades of knowledge.

    Sho Koyasu;Sho Koyasu;Minoru Kobayashi;Yoko Goto;Masahiro Hiraoka

  • Oxidative stress and altered antioxidant defenses in children with acute exacerbation of atopic dermatitis.

    Hirokazu Tsukahara;Rumiko Shibata;Yusei Ohshima;Yukiko Todoroki

  • Magnetite nanoparticles with high heating efficiencies for application in the hyperthermia of cancer

    Zhixia Li;Masakazu Kawashita;Norio Araki;Michihide Mitsumori

Frequent Co-Authors

Akira Nakamura
Akira Nakamura Osaka University
Hiroki Shirato
Hiroki Shirato Hokkaido University
Osamu Ogawa
Osamu Ogawa Kyoto University
Kaori Togashi
Kaori Togashi Kyoto University
Shuji Kaneko
Shuji Kaneko Kyoto University
Masayuki Imamura
Masayuki Imamura Kyoto University
Kiichi Hirota
Kiichi Hirota Kansai Medical University
Susumu Miyamoto
Susumu Miyamoto Kyoto University
Hideo Saji
Hideo Saji Kyoto University
Tadashi Kokubo
Tadashi Kokubo Chubu University

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