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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 70 6041 5482 380 356 335 13600

Osamu Tanaka publications per year

The chart shows the history of publications by Osamu Tanaka between 1950 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Osamu Tanaka published across 77 years, from 1950 to 2026, averaging 15 papers a year. Output peaked at 70 publications in 1990. 6 of the 1,154 publications appeared in the last two years.

No. of publications
20 40 60
Bar chart. Horizontal axis: year, 1950 to 2026. Vertical axis: number of publications, 0 to 70. Peak 70 publications in 1990. 1950: 1 publication 1951: 0 publications 1952: 2 publications 1953: 2 publications 1954: 1 publication 1955: 4 publications 1956: 1 publication 1957: 0 publications 1958: 3 publications 1959: 1 publication 1960: 0 publications 1961: 0 publications 1962: 2 publications 1963: 7 publications 1964: 1 publication 1965: 5 publications 1966: 8 publications 1967: 6 publications 1968: 5 publications 1969: 6 publications 1970: 7 publications 1971: 2 publications 1972: 15 publications 1973: 7 publications 1974: 8 publications 1975: 5 publications 1976: 12 publications 1977: 13 publications 1978: 11 publications 1979: 19 publications 1980: 16 publications 1981: 22 publications 1982: 25 publications 1983: 25 publications 1984: 37 publications 1985: 34 publications 1986: 29 publications 1987: 28 publications 1988: 45 publications 1989: 41 publications 1990: 70 publications 1991: 34 publications 1992: 36 publications 1993: 25 publications 1994: 42 publications 1995: 34 publications 1996: 17 publications 1997: 29 publications 1998: 15 publications 1999: 18 publications 2000: 12 publications 2001: 15 publications 2002: 21 publications 2003: 15 publications 2004: 11 publications 2005: 18 publications 2006: 22 publications 2007: 29 publications 2008: 17 publications 2009: 19 publications 2010: 14 publications 2011: 15 publications 2012: 16 publications 2013: 9 publications 2014: 12 publications 2015: 11 publications 2016: 16 publications 2017: 30 publications 2018: 13 publications 2019: 18 publications 2020: 12 publications 2021: 12 publications 2022: 5 publications 2023: 7 publications 2024: 3 publications 2025: 5 publications 2026: 1 publication
1950 2026

1,154 publications in total across all disciplines

View publications per year as a table
Osamu Tanaka: publications per year, 1950 to 2026
Year Publications
1950 1
1951 0
1952 2
1953 2
1954 1
1955 4
1956 1
1957 0
1958 3
1959 1
1960 0
1961 0
1962 2
1963 7
1964 1
1965 5
1966 8
1967 6
1968 5
1969 6
1970 7
1971 2
1972 15
1973 7
1974 8
1975 5
1976 12
1977 13
1978 11
1979 19
1980 16
1981 22
1982 25
1983 25
1984 37
1985 34
1986 29
1987 28
1988 45
1989 41
1990 70
1991 34
1992 36
1993 25
1994 42
1995 34
1996 17
1997 29
1998 15
1999 18
2000 12
2001 15
2002 21
2003 15
2004 11
2005 18
2006 22
2007 29
2008 17
2009 19
2010 14
2011 15
2012 16
2013 9
2014 12
2015 11
2016 16
2017 30
2018 13
2019 18
2020 12
2021 12
2022 5
2023 7
2024 3
2025 5
2026 1
Total 1,154
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Osamu Tanaka publication distribution in Chemistry in 2026

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

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 321–340 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 335 publications — 70th percentile

70% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643 335
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Osamu Tanaka D-index placement in Chemistry in 2026

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

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 70–71 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 70 D-Index — 68th percentile

68% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646 70
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

Osamu Tanaka is affiliated with Maruzen Pharmaceuticals Co. Ltd. in Japan and has an extensive publication record primarily in the field of Medicine, with a focus on Radiology, Nuclear Medicine and Imaging, Pulmonary and Respiratory Medicine, Surgery, Radiation, and Cardiology and Cardiovascular Medicine.

Their research work spans various specialized topics, including:

  • Advanced Radiotherapy Techniques
  • Medical Imaging Techniques and Applications
  • Radiomics and Machine Learning in Medical Imaging
  • Management of metastatic bone disease
  • Gastric Cancer Management and Outcomes
  • MRI in cancer diagnosis
  • Gastrointestinal Tumor Research and Treatment

Recent papers by Osamu Tanaka include:

  • Hemostatic radiotherapy for inoperable gastric cancer: a pilot study, 2020, British Journal of Radiology
  • Radiotherapy for prostate cancer: Effect of gold fiducial markers on diffusion-weighted magnetic resonance imaging, 2020, Asia-Pacific Journal of Clinical Oncology
  • Adrenal Stereotactic Body Radiation Therapy: The Effects of a Full and Empty Stomach on Radiation Dose to Organs at Risk, 2021, International Journal of Radiation Oncology*Biology*Physics
  • A gross anatomical study of the styloid process of the temporal bone in Japanese cadavers, 2021, Folia Morphologica

The venues where Osamu Tanaka frequently publishes include:

  • International Journal of Radiation Oncology*Biology*Physics
  • Research Square (Research Square)
  • Folia Morphologica
  • Asia-Pacific Journal of Clinical Oncology
  • Journal of the Neurological Sciences

Frequent co-authors working with Osamu Tanaka are:

  • Chiyoko Makita
  • Masayuki Matsuo
  • Takuya Taniguchi
  • Shuto Nakaya
  • Takuji Kiryu

Best Publications

  • 13C nmr study of α- and β-anomeric pairs of d-mannopyranosides and l-rhamnopyranosides

    R. Kasai;M. Okihara;J. Asakawa;K. Mizutani

  • New sweet diterpene glucosides from Stevia rebaudiana

    Hiroshi Kohda;Ryoji Kasai;Kazuo Yamasaki;Kuniko Murakami

  • ^ C Nuclear Magnetic Resonance of Lupane-Type Triterpenes, Lupeol, Betulin and Betulinic Acid

    Mochammad Sholichin;Kazuo Yamasaki;Ryoji Kasai;Osamu Tanaka

  • Carbon-13 chemical shifts of isoprenoid-β-D-glucopyranosides and -β-D-mannopyranosides. Stereochemical influences of aglycone alcohols

    Ryoji Kasai;Mizue Suzuo;Jun-ichi Asakawa;Osamu Tanaka

  • 13C NMR Study of ginseng sapogenins and their related dammarane type triterpenes

    J. Asakawa;R. Kasai;K. Yamasaki;O. Tanaka

  • Degradation of ginseng saponins under mild acidic conditions.

    Unknown

  • Studies on the Constituents of Japanese and Chinese Crude Drugs. XI. Panaxadiol, A Sapogenin of Ginseng Roots. (1).

    Shoji Shibata;Mitiiti Fujita;Hideji Itokawa;Osamu Tanaka

  • N.m.r. spectral study of α- and β-l-arabinofuranosides

    Kenji Mizutani;Ryoji Kasai;Midori Nakamura;Osamu Tanaka

  • Regulatory Role of CD38 (ADP-ribosyl Cyclase/Cyclic ADP-ribose Hydrolase) in Insulin Secretion by Glucose in Pancreatic βCells ENHANCED INSULIN SECRETION IN CD38-EXPRESSING TRANSGENIC MICE

    Ichiro Kato;Shin Takasawa;Atsuya Akabane;Osamu Tanaka

  • STUDIES ON SAPONINS AND SAPOGENINS OF GINSENG. THE STRUCTURE OF PANAXATRIOL.

    S. Shibata;O. Tanaka;K. Sôma;Y. Iida

  • Studies on Balanites aegyptiaca fruits, an antidiabetic Egyptian folk medicine.

    Mohamed S. Kamel;Kazuhiro Ohtani;Tomonori Kurokawa;Mahmoud H. Assaf

  • Studies on the Saponins of Ginseng. I. Structures of Ginsenoside-Ro, -Rb1, -Rb2, -Rc and -Rd

    Unknown

  • β-glucosyl esters of 19α-hydroxyursolic acid derivatives in leaves of Rubus species

    Takashi Seto;Takashi Tanaka;Osamu Tanaka;Naohiro Naruhashi;Naohiro Naruhashi

  • Structures of stevia diterpene-glucosides : Application of 13C NMR

    Kazuo Yamasaki;Hiroshi Kohda;Toshiko Kobayashi;Ryoji Kasai

  • Antiyeast steroidal saponins from Yucca schidigera (Mohave Yucca), a new anti-food-deteriorating agent

    Masazumi Miyakoshi;Yukiyoshi Tamura;Hitoshi Masuda;Kenji Mizutani

  • Minor-cucurbitane-glycosides from fruits of Siraitia grosvenori (Cucurbitaceae)

    Kazuhiro Matsumoto;Ryoji Kasai;Kazuhiro Ohtani;Osamu Tanaka

  • Bioactive saponins and glycosides. VIII. Notoginseng (1): New dammarane-type triterpene oligoglycosides, notoginsenosides-A, -B, -C, and -D, from the dried root of Panax notoginseng (BURK.) F. H. Chen

    Masayuki Yoshikawa;Toshiyuki Murakami;Takahiro Ueno;Kenichi Yashiro

  • Minor diterpene glycosides from sweet leaves of Rubus suavissimus

    Kazuhiro Ohtani;Yoko Aikawa;Ryoji Kasai;Wen-Hua Chou;Wen-Hua Chou

  • Saponins from Vietnamese Ginseng, Panax vietnamensis HA et GRUSHV. Collected in Central Vietnam. III

    Nguyen Minh Duc;Ryoji Kasai;Kazuhiro Ohtani;Aiko Ito

  • Saponins of red ginseng.

    Ryoji Kasai;Hiromichi Besso;Osamu Tanaka;Yuhichiro Saruwatari

  • Dammarane saponins of leaves of Panax pseudo-ginseng subsp. himalaicus

    Osamu Tanaka;Shoji Yahara

  • Further study on dammarane-type saponins of roots, leaves, flower-buds, and fruits of Panax ginseng C.A. Meyer

    Shoji Yahara;Kiyoko Kaji;Osamu Tanaka

  • Application of 13C NMR Spectroscopy to Chemistry of Natural Glycosides : Rebaudioside-C, a New Sweet Diterpene Glycoside of Stevia rebaudiana

    Ikunori Sakamoto;Kazuo Yamasaki;Osamu Tanaka

  • Enzymic Transglucosylation Products of Stevioside: Separation and Sweetness-evaluation

    Yuichiro Fukunaga;Takeshi Miyata;Noriko Nakayasu;Kenji Mizutani

  • Dammarane-Saponins of Sanchi-Ginseng, Roots of Panax notoginseng (BURK.) F.H. CHEN (Araliaceae) : Structures of New Saponins, Notoginsenosides-R1 and -R2, and Identification of Ginsenosides-Rg2 and -Rh1

    Jun Zhou;Mingzhu Wu;Shigenori Taniyasu;Hiromichi Besso

Frequent Co-Authors

Ryoji Kasai
Ryoji Kasai Hiroshima University
Kazuo Yamasaki
Kazuo Yamasaki Hiroshima University
Takashi Tanaka
Takashi Tanaka Nagasaki University
Johji Yamahara
Johji Yamahara Kyoto Pharmaceutical University
Wu-Sheng Lu
Wu-Sheng Lu University of Victoria
Itsuo Nishioka
Itsuo Nishioka Kyushu University
Harukuni Tokuda
Harukuni Tokuda Kyoto University
Hisashi Matsuda
Hisashi Matsuda Kyoto Pharmaceutical University
Sam Sik Kang
Sam Sik Kang Seoul National University
Hoyoku Nishino
Hoyoku Nishino Kyoto Prefectural University of Medicine

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