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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Biology and Biochemistry 62 10877 10037 741 698 259 12674

Chisei Ra publications per year

The chart shows the history of publications by Chisei Ra between 1986 and 2020, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Chisei Ra published across 35 years, from 1986 to 2020, averaging 8.2 papers a year. Output peaked at 25 publications in 2001. 3 of the 287 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1986 to 2020. Vertical axis: number of publications, 0 to 25. Peak 25 publications in 2001. 1986: 1 publication 1987: 0 publications 1988: 0 publications 1989: 1 publication 1990: 1 publication 1991: 1 publication 1992: 0 publications 1993: 1 publication 1994: 1 publication 1995: 4 publications 1996: 4 publications 1997: 7 publications 1998: 4 publications 1999: 17 publications 2000: 18 publications 2001: 25 publications 2002: 22 publications 2003: 14 publications 2004: 4 publications 2005: 15 publications 2006: 10 publications 2007: 10 publications 2008: 19 publications 2009: 20 publications 2010: 21 publications 2011: 12 publications 2012: 13 publications 2013: 24 publications 2014: 4 publications 2015: 5 publications 2016: 5 publications 2017: 1 publication 2018: 0 publications 2019: 1 publication 2020: 2 publications
1986 2020

287 publications in total across all disciplines

View publications per year as a table
Chisei Ra: publications per year, 1986 to 2020
Year Publications
1986 1
1987 0
1988 0
1989 1
1990 1
1991 1
1992 0
1993 1
1994 1
1995 4
1996 4
1997 7
1998 4
1999 17
2000 18
2001 25
2002 22
2003 14
2004 4
2005 15
2006 10
2007 10
2008 19
2009 20
2010 21
2011 12
2012 13
2013 24
2014 4
2015 5
2016 5
2017 1
2018 0
2019 1
2020 2
Total 287
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Chisei Ra publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Chisei Ra sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 100 bars. Horizontal axis: publications, 47–56 to 1,028+. Vertical axis: number of scientists, 0 to 980. Most scientists, 980, have 127–136 publications. The last bar groups every scientist with 1,028 publications or more. The highlighted bar, 257–266 publications, is where this scientist sits. 47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 413 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 848 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 949 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 840 scientists 207–216 publications: 733 scientists 217–226 publications: 708 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 417 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 196 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 59 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientist 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientist 1,028+ publications: 100 scientists
47–56 publications 1,028+

This scientist: 259 publications — 69th percentile

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

The last bar groups every scientist with 1,028 publications or more.

View publications distribution as a table
Number of Biology and Biochemistry scientists by publication count, Research.com 2026 ranking edition. Based on 19,587 ranked scientists.
Publications Scientists This scientist
47–56 8
57–66 35
67–76 106
77–86 231
87–96 413
97–106 546
107–116 704
117–126 848
127–136 980
137–146 942
147–156 969
157–166 949
167–176 951
177–186 915
187–196 787
197–206 840
207–216 733
217–226 708
227–236 651
237–246 605
247–256 510
257–266 524 259
267–276 434
277–286 417
287–296 350
297–306 363
307–316 315
317–326 296
327–336 261
337–346 240
347–356 219
357–366 196
367–376 154
377–386 161
387–396 155
397–406 145
407–416 124
417–426 112
427–436 132
437–446 116
447–456 99
457–466 81
467–476 91
477–486 80
487–496 80
497–506 59
507–516 36
517–526 46
527–536 54
537–546 44
547–556 43
557–566 43
567–576 42
577–586 25
587–596 34
597–606 23
607–616 33
617–626 31
627–636 27
637–646 25
647–656 28
657–666 34
667–676 18
677–686 16
687–696 10
697–706 12
707–716 21
717–726 12
727–736 12
737–746 10
747–756 7
757–766 13
767–776 15
777–786 13
787–796 9
797–806 9
807–816 7
817–826 4
827–836 9
837–846 7
847–856 3
857–866 5
867–876 5
877–886 11
887–896 3
897–906 4
907–916 7
917–926 5
927–936 6
937–946 6
947–956 3
957–966 7
967–976 2
977–986 2
987–996 1
997–1,006 5
1,007–1,016 2
1,017–1,026 2
1,027 1
1,028+ 100
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Chisei Ra D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Chisei Ra sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 65 bars. Horizontal axis: D-Index, 40–41 to 167+. Vertical axis: number of scientists, 0 to 1,253. Most scientists, 1,253, have 58–59 D-Index. The last bar groups every scientist with 167 D-Index or more. The highlighted bar, 62–63 D-Index, is where this scientist sits. 40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 316 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 899 scientists 52–53 D-Index: 1,025 scientists 54–55 D-Index: 1,149 scientists 56–57 D-Index: 1,235 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,162 scientists 62–63 D-Index: 1,130 scientists 64–65 D-Index: 1,031 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 714 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 71 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40–41 D-Index 167+

This scientist: 62 D-Index — 46th percentile

46% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

View D-Index distribution as a table
Number of Biology and Biochemistry scientists by D-index, Research.com 2026 ranking edition. Based on 19,587 ranked scientists.
D-Index Scientists This scientist
40–41 80
42–43 183
44–45 316
46–47 504
48–49 718
50–51 899
52–53 1,025
54–55 1,149
56–57 1,235
58–59 1,253
60–61 1,162
62–63 1,130 62
64–65 1,031
66–67 897
68–69 814
70–71 714
72–73 709
74–75 596
76–77 512
78–79 473
80–81 412
82–83 373
84–85 358
86–87 285
88–89 273
90–91 227
92–93 208
94–95 193
96–97 153
98–99 157
100–101 148
102–103 120
104–105 113
106–107 100
108–109 86
110–111 67
112–113 71
114–115 73
116–117 64
118–119 53
120–121 60
122–123 54
124–125 43
126–127 38
128–129 49
130–131 26
132–133 18
134–135 23
136–137 32
138–139 32
140–141 27
142–143 19
144–145 22
146–147 12
148–149 16
150–151 14
152–153 10
154–155 13
156–157 10
158–159 7
160–161 9
162–163 13
164–165 4
166 4
167+ 98
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Overview

Chisei Ra is affiliated with Nihon University in Japan and conducts research primarily in the field of Medicine, with a significant focus on Surgery and Oncology. Their scholarly output includes 360 publications within Medicine, of which 118 pertain to Surgery and 75 to Oncology. Additional subfields of study include Pulmonary and Respiratory Medicine, Cardiology and Cardiovascular Medicine, and Biomedical Engineering.

Their research topics cover several areas including colorectal cancer surgical treatments, surgical simulation and training, cardiac, anesthesia and surgical outcomes, abdominal surgery and complications, colorectal cancer screening and detection, infection control and ventilation, and the impacts of COVID-19 on healthcare.

Chisei Ra's recent publications demonstrate involvement in various aspects of surgical methods and assessment. Notable papers include:

  • Fluorescence-guided surgery: comprehensive review (2023, BJS Open)
  • Development and validation of a recommended checklist for assessment of surgical videos quality: the LAParoscopic surgery Video Educational GuidelineS (LAP-VEGaS) video assessment tool (2020, Surgical Endoscopy)
  • Artificial intelligence indocyanine green (ICG) perfusion for colorectal cancer intra-operative tissue classification (2020, British journal of surgery)
  • Inter-user variation in the interpretation of near infrared perfusion imaging using indocyanine green in colorectal surgery (2021, Surgical Endoscopy)
  • COVID-19 and the treatment of acute appendicitis in Ireland: a new era or short-term pivot? (2020, Colorectal Disease)

Frequent co-authors collaborating with Chisei Ra include Mohammad Faraz Khan, Jeffrey Dalli, Niall Hardy, Alice Moynihan, and Philip D. McEntee.

The scientist's work is often published in journals specialized in colorectal and surgical disciplines. The main publication venues are:

  • Colorectal Disease
  • Mesentery and Peritoneum
  • Surgical Endoscopy
  • British journal of surgery
  • European Journal of Surgical Oncology

Chisei Ra's research covers applied and clinical aspects of surgery with interest in improving surgical techniques, educational tools for surgical video assessment, perfusion imaging interpretation, and the role of artificial intelligence in intra-operative tissue classification. The publications also reflect engagement with health care challenges linked to COVID-19 and its effects on surgical treatment pathways.

Best Publications

  • Expression of Mas-related gene X2 on mast cells is upregulated in the skin of patients with severe chronic urticaria

    Daisuke Fujisawa;Jun Ichi Kashiwakura;Hirohito Kita;Yusuke Kikukawa

  • IgE enhances Fc epsilon receptor I expression and IgE-dependent release of histamine and lipid mediators from human umbilical cord blood-derived mast cells: synergistic effect of IL-4 and IgE on human mast cell Fc epsilon receptor I expression and mediator release.

    Masao Yamaguchi;Koichi Sayama;Koji Yano;Chris S. Lantz

  • Cutting edge: VacA, a vacuolating cytotoxin of Helicobacter pylori, directly activates mast cells for migration and production of proinflammatory cytokines.

    Volaluck Supajatura;Hiroko Ushio;Akihiro Wada;Kinnosuke Yahiro

  • Establishment of a Human Allergy Model Using Human IL-3/GM-CSF–Transgenic NOG Mice

    Ryoji Ito;Takeshi Takahashi;Ikumi Katano;Kenji Kawai

  • Positive and Negative Regulation of Mast Cell Activation by Lyn via the FcεRI

    Wenbin Xiao;Hajime Nishimoto;Hong Hong;Jiro Kitaura

  • Fc epsilon RI signaling of mast cells activates intracellular production of hydrogen peroxide: role in the regulation of calcium signals.

    Yoshihiro Suzuki;Tetsuro Yoshimaru;Takashi Matsui;Toshio Inoue

  • Transcriptional Regulation of Fcgr2b Gene by Polymorphic Promoter Region and Its Contribution to Humoral Immune Responses

    Yan Xiu;Kazuhiro Nakamura;Masaaki Abe;Na Li

  • Tissue remodeling induced by hypersecreted epidermal growth factor and amphiregulin in the airway after an acute asthma attack

    Yukinori Enomoto;Kanami Orihara;Tetsuya Takamasu;Akio Matsuda

  • Activation of human mast cells through the platelet-activating factor receptor

    Naoki Kajiwara;Tomomi Sasaki;Peter Bradding;Glenn Cruse

  • The FcϵRIβ Immunoreceptor Tyrosine-based Activation Motif Exerts Inhibitory Control on MAPK and IκB Kinase Phosphorylation and Mast Cell Cytokine Production *

    Yasuko Furumoto;Satoshi Nunomura;Tomoyoshi Terada;Juan Rivera

  • A20 inhibits toll-like receptor 2- and 4-mediated interleukin-8 synthesis in airway epithelial cells.

    Yasuhiro Gon;Yasukiyo Asai;Shu Hashimoto;Kenji Mizumura

  • Mast cell maturation is driven via a group III phospholipase A2-prostaglandin D2–DP1 receptor paracrine axis

    Yoshitaka Taketomi;Yoshitaka Taketomi;Noriko Ueno;Takumi Kojima;Hiroyasu Sato;Hiroyasu Sato

  • FcεRI-mediated thymic stromal lymphopoietin production by interleukin-4-primed human mast cells

    Y. Okayama;S. Okumura;H. Sagara;K. Yuki

  • Enhancement of drug delivery to bone : Characterization of human tissue-nonspecific alkaline phosphatase tagged with an acidic oligopeptide

    Tatsuo Nishioka;Shunji Tomatsu;Monica A. Gutierrez;Ken-ichi Miyamoto

  • Role of Oxidants in Mast Cell Activation

    Yoshihiro Suzuki;Tetsuro Yoshimaru;Toshio Inoue;Osamu Niide

  • Infantile Hypophosphatasia: Transplantation Therapy Trial Using Bone Fragments and Cultured Osteoblasts

    Richard A. Cahill;Deborah Wenkert;Sharon A. Perlman;Ann Steele

  • Significantly High Levels of Anti-dsDNA Immunoglobulin E in Sera and the Ability of dsDNA to Induce the Degranulation of Basophils from Chronic Urticaria Patients

    Yuko Hatada;Jun-ichi Kashiwakura;Koremasa Hayama;Daisuke Fujisawa

  • The Src family kinase Hck regulates mast cell activation by suppressing an inhibitory Src family kinase Lyn

    Hong Hong;Jiro Kitaura;Wenbin Xiao;Vaclav Horejsi

  • A Novel −66T/C Polymorphism in FcεRI α-Chain Promoter Affecting the Transcription Activity: Possible Relationship to Allergic Diseases

    Masanari Hasegawa;Chiharu Nishiyama;Makoto Nishiyama;Yushiro Akizawa

  • Dapsone suppresses human neutrophil superoxide production and elastase release in a calcium-dependent manner.

    T. Suda;Y. Suzuki;T. Matsui;T. Inoue

Frequent Co-Authors

Yoshimichi Okayama
Yoshimichi Okayama Nihon University
Ko Okumura
Ko Okumura Juntendo University
Hirohisa Saito
Hirohisa Saito Juntendo University
Hideoki Ogawa
Hideoki Ogawa Juntendo University
Toshiaki Kawakami
Toshiaki Kawakami University of California, San Diego
Yuko Kawakami
Yuko Kawakami La Jolla Institute For Allergy & Immunology
Akira Matsuda
Akira Matsuda Juntendo University
Kenji Matsumoto
Kenji Matsumoto Izumi Municipal Hospital
Makoto Makishima
Makoto Makishima Nihon University
Makoto Nishiyama
Makoto Nishiyama University of Tokyo

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