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Hirofumi Sawa

Hirofumi Sawa

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Microbiology 72 1732 1573 49 44 375 20476

Hirofumi Sawa publications per year

The chart shows the history of publications by Hirofumi Sawa between 1990 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Hirofumi Sawa published across 36 years, from 1990 to 2025, averaging 13.8 papers a year. Output peaked at 49 publications in 2023. 51 of the 496 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1990 to 2025. Vertical axis: number of publications, 0 to 49. Peak 49 publications in 2023. 1990: 5 publications 1991: 3 publications 1992: 10 publications 1993: 3 publications 1994: 5 publications 1995: 4 publications 1996: 5 publications 1997: 1 publication 1998: 3 publications 1999: 2 publications 2000: 6 publications 2001: 13 publications 2002: 19 publications 2003: 15 publications 2004: 18 publications 2005: 11 publications 2006: 11 publications 2007: 18 publications 2008: 7 publications 2009: 10 publications 2010: 11 publications 2011: 10 publications 2012: 16 publications 2013: 12 publications 2014: 14 publications 2015: 11 publications 2016: 10 publications 2017: 15 publications 2018: 14 publications 2019: 17 publications 2020: 20 publications 2021: 46 publications 2022: 31 publications 2023: 49 publications 2024: 24 publications 2025: 27 publications
1990 2025

496 publications in total across all disciplines

View publications per year as a table
Hirofumi Sawa: publications per year, 1990 to 2025
Year Publications
1990 5
1991 3
1992 10
1993 3
1994 5
1995 4
1996 5
1997 1
1998 3
1999 2
2000 6
2001 13
2002 19
2003 15
2004 18
2005 11
2006 11
2007 18
2008 7
2009 10
2010 11
2011 10
2012 16
2013 12
2014 14
2015 11
2016 10
2017 15
2018 14
2019 17
2020 20
2021 46
2022 31
2023 49
2024 24
2025 27
Total 496
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Hirofumi Sawa publications per year - data summary

  • Hirofumi Sawa, a Microbiology scholar from Hokkaido University, has 496 publications recorded across 36 years, from 1990 to 2025.
  • The oldest publication on record dates to 1990 and the most recent to 2025.
  • The most productive year is 2023, with 49 publications.
  • The least productive year with any output is 1997, with 1 publication.
  • The rate of publication averages 13.8 papers per year over the whole span, or 13.8 per year counting only the 36 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 177 publications, 36% of the career total.
  • Split into equal eras - 1990-2001: 60 publications (5.0 per year); 2002-2013: 158 publications (13.2 per year); 2014-2025: 278 publications (23.2 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Hirofumi Sawa publication distribution in Microbiology in 2026

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

No. of scientists
50 100 150 200 250
Bar chart with 64 bars. Horizontal axis: publications, 55–64 to 679+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 135–144 publications. The last bar groups every scientist with 679 publications or more. The highlighted bar, 375–384 publications, is where this scientist sits. 55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 265 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 234 scientists 205–214 publications: 208 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55–64 publications 679+

This scientist: 375 publications — 88th percentile

88% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

View publications distribution as a table
Number of Microbiology scientists by publication count, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
Publications Scientists This scientist
55–64 8
65–74 29
75–84 55
85–94 112
95–104 137
105–114 190
115–124 235
125–134 234
135–144 288
145–154 265
155–164 264
165–174 253
175–184 276
185–194 190
195–204 234
205–214 208
215–224 198
225–234 155
235–244 161
245–254 160
255–264 146
265–274 139
275–284 148
285–294 115
295–304 96
305–314 88
315–324 106
325–334 65
335–344 76
345–354 64
355–364 62
365–374 65
375–384 61 375
385–394 34
395–404 44
405–414 36
415–424 35
425–434 29
435–444 33
445–454 34
455–464 25
465–474 26
475–484 20
485–494 19
495–504 16
505–514 17
515–524 23
525–534 14
535–544 14
545–554 18
555–564 12
565–574 7
575–584 9
585–594 9
595–604 9
605–614 7
615–624 9
625–634 7
635–644 4
645–654 5
655–664 6
665–674 7
675–678 3
679+ 99
Download as CSV

Hirofumi Sawa publication distribution in Microbiology in 2026 - data summary

  • The chart plots the publication count of all 5,513 Microbiology scientists ranked by Research.com in 2026, grouped into 64 ranges running from 55–64 to 679+ publications.
  • Hirofumi Sawa, a Microbiology scholar from Hokkaido University, records 375 publications - the 88th percentile of the discipline.
  • 88% of ranked Microbiology scientists score the same or lower than Hirofumi Sawa, and about 12% score higher.
  • The median of the discipline falls in the 195–204 publications range, and Hirofumi Sawa ranks above the median.
  • The most crowded range is 135–144 publications, holding 288 scientists (5% of the field).
  • 54% of the field sits in the lowest quarter of the value range (up to 205–214 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 679 publications or more, 99 scientists in all (2% of the field).

Hirofumi Sawa D-index placement in Microbiology in 2026

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

No. of scientists
50 100 150
Bar chart with 88 bars. Horizontal axis: D-Index, 40 to 127+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 58 D-Index. The last bar groups every scientist with 127 D-Index or more. The highlighted bar, 72 D-Index, is where this scientist sits. 40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 112 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 123 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 94 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 72 D-Index — 69th percentile

69% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

View D-Index distribution as a table
Number of Microbiology scientists by D-index, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
D-Index Scientists This scientist
40 30
41 86
42 90
43 117
44 122
45 123
46 108
47 110
48 106
49 109
50 129
51 111
52 116
53 127
54 134
55 134
56 112
57 136
58 162
59 151
60 139
61 123
62 126
63 144
64 109
65 103
66 124
67 112
68 103
69 131
70 94
71 93
72 96 72
73 92
74 80
75 66
76 87
77 60
78 73
79 59
80 57
81 55
82 47
83 77
84 50
85 45
86 42
87 41
88 32
89 38
90 35
91 34
92 27
93 26
94 33
95 22
96 37
97 22
98 21
99 22
100 30
101 16
102 20
103 17
104 19
105 16
106 19
107 18
108 14
109 10
110 9
111 7
112 11
113 6
114 15
115 10
116 12
117 7
118 10
119 10
120 11
121 2
122 7
123 12
124 5
125 9
126 6
127+ 95
Download as CSV

Hirofumi Sawa D-index placement in Microbiology in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 5,513 Microbiology scientists ranked by Research.com in 2026, grouped into 88 ranges running from 40 to 127+ D-Index.
  • Hirofumi Sawa, a Microbiology scholar from Hokkaido University, records 72 D-Index - the 69th percentile of the discipline.
  • 69% of ranked Microbiology scientists score the same or lower than Hirofumi Sawa, and about 31% score higher.
  • The median of the discipline falls in the 63 D-Index range, and Hirofumi Sawa ranks above the median.
  • The most crowded range is 58 D-Index, holding 162 scientists (3% of the field).
  • 47% of the field sits in the lowest quarter of the value range (up to 61 D-Index), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 127 D-Index or more, 95 scientists in all (2% of the field).

Overview

Hirofumi Sawa is a researcher affiliated with Hokkaido University in Japan. Their work predominantly focuses on the field of medicine, with a particular emphasis on infectious diseases and related subfields such as public health, environmental and occupational health, epidemiology, molecular biology, and virology.

The scientist's research covers several main topics, including:

  • SARS-CoV-2 and COVID-19 Research
  • Viral Infections and Vectors
  • Mosquito-borne diseases and control
  • Viral gastroenteritis research and epidemiology
  • COVID-19 Clinical Research Studies
  • Animal Virus Infections Studies
  • Rabies epidemiology and control

Hirofumi Sawa has contributed to numerous publications, with frequent appearances in journals such as:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Viruses
  • Pathogens
  • Scientific Reports
  • Journal of Virology

Several recent papers authored or co-authored by Sawa include:

  • "Attenuated fusogenicity and pathogenicity of SARS-CoV-2 Omicron variant," published in 2022 in Nature
  • "Discovery of S-217622, a Noncovalent Oral SARS-CoV-2 3CL Protease Inhibitor Clinical Candidate for Treating COVID-19," published in 2022 in Journal of Medicinal Chemistry
  • "Virological characteristics of the SARS-CoV-2 Omicron BA.2 spike," published in 2022 in Cell
  • "Virological characteristics of the SARS-CoV-2 XBB variant derived from recombination of two Omicron subvariants," published in 2023 in Nature Communications
  • "RIG-I triggers a signaling-abortive anti-SARS-CoV-2 defense in human lung cells," published in 2021 in Nature Immunology

The scientist has frequently collaborated with other researchers, including:

  • Michihito Sasaki
  • Yasuko Orba
  • Masahiro Kajihara
  • William W. Hall
  • Edgar Simulundu

Best Publications

  • Massive cell death of immature hematopoietic cells and neurons in Bcl-x-deficient mice

    Noboru Motoyama;Fanping Wang;Kevin A. Roth;Hirofumi Sawa

  • Transgenic expression of Helicobacter pylori CagA induces gastrointestinal and hematopoietic neoplasms in mouse

    Naomi Ohnishi;Hitomi Yuasa;Shinya Tanaka;Hirofumi Sawa

  • Discovery of S-217622, a Noncovalent Oral SARS-CoV-2 3CL Protease Inhibitor Clinical Candidate for Treating COVID-19

    Unknown

  • Attenuated fusogenicity and pathogenicity of SARS-CoV-2 Omicron variant

    Unknown

  • Gold Nanoparticles as a Vaccine Platform: Influence of Size and Shape on Immunological Responses in Vitro and in Vivo

    Kenichi Niikura;Tatsuya Matsunaga;Tadaki Suzuki;Shintaro Kobayashi

  • Chk2-deficient mice exhibit radioresistance and defective p53-mediated transcription.

    Hiroyuki Takai;Kazuhito Naka;Yuki Okada;Miho Watanabe

  • Targeted disruption of Bcl-2 alpha beta in mice: occurrence of gray hair, polycystic kidney disease, and lymphocytopenia

    K Nakayama;I Negishi;K Kuida;H Sawa

  • Virological characteristics of the SARS-CoV-2 Omicron BA.2 spike

    Unknown

  • Synthetic Double-Stranded RNA Poly(I:C) Combined with Mucosal Vaccine Protects against Influenza Virus Infection

    Takeshi Ichinohe;Izumi Watanabe;Izumi Watanabe;Satoshi Ito;Satoshi Ito;Hideki Fujii

  • Thymus-derived leukemia-lymphoma in mice transgenic for the Tax gene of human T-lymphotropic virus type I

    Hideki Hasegawa;Hirofumi Sawa;Martha J Lewis;Martha J Lewis;Yasuko Orba

  • The sphingosine-1-phosphate transporter Spns2 expressed on endothelial cells regulates lymphocyte trafficking in mice

    Shigetomo Fukuhara;Szandor Simmons;Shunsuke Kawamura;Asuka Inoue

  • Virological characteristics of the SARS-CoV-2 Omicron BA.2.75 variant

    Unknown

  • Induction of Plasminogen Activator Inhibitor Type-1 (PAI-1) by Proinsulin and Insulin In Vivo

    Thomas K. Nordt;Hirofumi Sawa;Satoshi Fujii;Burton E. Sobel

  • SARS-CoV-2 variants with mutations at the S1/S2 cleavage site are generated in vitro during propagation in TMPRSS2-deficient cells.

    Michihito Sasaki;Kentaro Uemura;Akihiko Sato;Shinsuke Toba

  • RIG-I triggers a signaling-abortive anti-SARS-CoV-2 defense in human lung cells.

    Taisho Yamada;Seiichi Sato;Yuki Sotoyama;Yasuko Orba

  • Drug-Induced Long-QT Syndrome Associated With a Subclinical SCN5A Mutation

    Naomasa Makita;Minoru Horie;Takeshi Nakamura;Tomohiko Ai

  • Analysis of transforming activity of human synovial sarcoma-associated chimeric protein SYT-SSX1 bound to chromatin remodeling factor hBRM/hSNF2α

    Makoto Nagai;Shinya Tanaka;Masumi Tsuda;Shuichi Endo

  • Forkhead Transcription Factor FoxO1 in Adipose Tissue Regulates Energy Storage and Expenditure

    Jun Nakae;Yongheng Cao;Miyo Oki;Yasuko Orba

  • CalDAG-GEFIII activation of Ras, R-Ras, and Rap1

    Shigeko Yamashita;Naoki Mochizuki;Yusuke Ohba;Minoru Tobiume

  • The Human Polyoma JC Virus Agnoprotein Acts as a Viroporin

    Tadaki Suzuki;Yasuko Orba;Yuki Okada;Yuji Sunden

  • Virological characteristics of SARS-CoV-2 BA.2 variant

    Unknown

  • Cross-Protection against H5N1 Influenza Virus Infection Is Afforded by Intranasal Inoculation with Seasonal Trivalent Inactivated Influenza Vaccine

    Takeshi Ichinohe;Shin-Ichi Tamura;Akira Kawaguchi;Akira Kawaguchi;Akira Kawaguchi;Ai Ninomiya

  • Hydrocephalus, Situs Inversus, Chronic Sinusitis, and Male Infertility in DNA Polymerase λ-Deficient Mice: Possible Implication for the Pathogenesis of Immotile Cilia Syndrome

    Yosuke Kobayashi;Miho Watanabe;Yuki Okada;Hirofumi Sawa

  • Pertussis toxin-sensitive signal controls the trafficking of thymocytes across the corticomedullary junction in the thymus.

    Gen Suzuki;Hirofumi Sawa;Yoshiyasu Kobayashi;Yukiko Nakata

  • Flavivirus Encephalitis Pathological Aspects of Mouse and Other Animal Models

    T. Kimura;M. Sasaki;M. Okumura;E. Kim

Frequent Co-Authors

Yasuko Orba
Yasuko Orba Hokkaido University
Kazuo Nagashima
Kazuo Nagashima Hokkaido University
William W. Hall
William W. Hall University College Dublin
Ayato Takada
Ayato Takada Hokkaido University
Shinya Tanaka
Shinya Tanaka Hokkaido University
Tadaki Suzuki
Tadaki Suzuki National Institutes of Health
Hideki Hasegawa
Hideki Hasegawa National Institutes of Health
Tetsutaro Sata
Tetsutaro Sata National Institute of Infectious Diseases
Chihiro Sugimoto
Chihiro Sugimoto Hokkaido University
Takeshi Kurata
Takeshi Kurata Juntendo University

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