World's Best Scientists 2026 revealed!
Shinji Tokonami

Shinji Tokonami

D-Index & Metrics

Environmental Sciences

D-Index
41
Citations
7688
World Ranking
7633
National Ranking
151

Shinji Tokonami publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Shinji Tokonami sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 426 publications — 95th percentile

95% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Shinji Tokonami D-index placement in Environmental Sciences in 2026

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

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 41 D-Index — 22nd percentile

22% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Shinji Tokonami is affiliated with Hirosaki University in Japan and has contributed extensively to research in health professions and environmental science. Their work primarily centers on radiological and ultrasound technology, global and planetary change, and nuclear medicine and imaging, with a strong focus on radioactivity and radon measurements.

The main topics addressed in Tokonami's publications include:

  • Radioactivity and Radon Measurements
  • Radioactive contamination and transfer
  • Radiation Dose and Imaging
  • Nuclear and radioactivity studies
  • Radiation Detection and Scintillator Technologies
  • Graphite, nuclear technology, radiation studies
  • Radiation Shielding Materials Analysis

Frequent co-authors collaborating with Tokonami are:

  • Masahiro Hosoda
  • Chutima Kranrod
  • Yasutaka Omori
  • Naofumi Akata
  • Yuki Tamakuma

Tokonami's research has been published in multiple venues, showing a concentration in journals that specialize in radiation and environmental health, including:

  • Radiation Protection Dosimetry
  • International Journal of Environmental Research and Public Health
  • Scientific Reports
  • Atmosphere
  • Journal of Radioanalytical and Nuclear Chemistry

Representative recent papers authored or co-authored by Tokonami include:

  • Characteristics of Thoron (220Rn) and Its Progeny in the Indoor Environment, 2020, International Journal of Environmental Research and Public Health
  • A unique high natural background radiation area - Dose assessment and perspectives, 2020, The Science of The Total Environment
  • Comprehensive exposure assessments from the viewpoint of health in a unique high natural background radiation area, Mamuju, Indonesia, 2021, Scientific Reports
  • The Importance of Direct Progeny Measurements for Correct Estimation of Effective Dose Due to Radon and Thoron, 2020, Frontiers in Public Health
  • Natural Radioactivity of Laterite and Volcanic Rock Sample for Radioactive Mineral Exploration in Mamuju, Indonesia, 2020, Geosciences

Overall, Tokonami's body of work demonstrates a sustained engagement with the measurement, assessment, and implications of natural and artificial radioactivity in environmental and health contexts. The research integrates multidisciplinary approaches within radiological sciences and environmental health, contributing data and insights pertinent to radiation dose assessment and contamination transfer.

Best Publications

  • Up-to-date radon-thoron discriminative detector for a large scale survey

    Shinji Tokonami;Hiroyuki Takahashi;Yosuke Kobayashi;Weihai Zhuo

  • Thyroid doses for evacuees from the Fukushima nuclear accident

    Shinji Tokonami;Masahiro Hosoda;Suminori Akiba;Atsuyuki Sorimachi

  • 222Rn concentrations of water in the Balaton Highland and in the southern part of Hungary, and the assessment of the resulting dose

    Károly Somlai;Shinji Tokonami;Tetsuo Ishikawa;Péter Vancsura

  • Why is 220Rn (thoron) measurement important

    S. Tokonami

  • Dose estimation derived from the exposure to radon, thoron and their progeny in the indoor environment.

    R. C. Ramola;Mukesh Prasad;Tushar Kandari;Preeti Pant

  • Cancer and non-cancer mortality among Inhabitants in the high background radiation area of Yangjiang, China (1979-1998).

    Zufan Tao;Suminori Akiba;Yongru Zha;Quanfu Sun

  • Strontium-90 activity concentration in soil samples from the exclusion zone of the Fukushima daiichi nuclear power plant.

    Sarata Kumar Sahoo;Norbert Kavasi;Atsuyuki Sorimachi;Hideki Arae

  • Assessment of the natural radioactivity using two techniques for the measurement of radionuclide concentration in building materials used in Japan

    Nabil M. Hassan;Nabil M. Hassan;Tetsuo Ishikawa;Masahiro Hosoda;Atsuyuki Sorimachi

  • A simple passive monitor for integrating measurements of indoor thoron concentrations

    Weihai Zhuo;Shinji Tokonami;Hidenori Yonehara;Yuji Yamada

  • Radon and thoron exposures for cave residents in Shanxi and Shaanxi provinces.

    Shinji Tokonami;Quanfu Sun;Suminori Akiba;Weihai Zhuo

  • Measurement of nationwide indoor Rn concentration in Japan

    Tetsuya Sanada;Kenzo Fujimoto;Keiji Miyano;Masahiro Doi

  • Radon Migration Process and Its Influence Factors; Review

    Nabil M. Hassan;Nabil M. Hassan;Masahiro Hosoda;Tetsuo Ishikawa;Atsuyuki Sorimachi

  • The time variation of dose rate artificially increased by the Fukushima nuclear crisis

    Masahiro Hosoda;Shinji Tokonami;Atsuyuki Sorimachi;Satoru Monzen

  • Anomalous radon emanation linked to preseismic electromagnetic phenomena

    Y. Omori;Y. Yasuoka;H. Nagahama;Y. Kawada;Y. Kawada

  • Evidence of precursor phenomena in the Kobe earthquake obtained from atmospheric radon concentration

    Yumi Yasuoka;George Igarashi;Testuo Ishikawa;Shinji Tokonami

  • Contribution from thoron on the response of passive radon detectors.

    Shinji Tokonami;Mingli Yang;Tetsuya Sanada

  • Simple, discriminative measurement technique for radon and thoron concentrations with a single scintillation cell

    Shinji Tokonami;Mingli Yang;Hidenori Yonehara;Yuji Yamada

  • Radon–Thoron Discriminative Measurements in Gansu Province, China, and Their Implication for Dose Estimates

    Yuji Yamada;Quanfu Sun;Shinji Tokonami;Suminori Akiba

  • Cancer and non-cancer health risks from carcinogenic heavy metal exposures in underground water from Kilimambogo, Kenya

    Catherine Nyambura;Nadir Omar Hashim;Margaret Wairimu Chege;Shinji Tokonami

  • Radon and thoron parallel measurements in Hungary

    N. Kávási;Cs. Németh;T. Kovács;S. Tokonami

  • Preliminary results of simultaneous radon and thoron tests in Ottawa.

    Jing Chen;Shinji Tokonami;Atsuyuki Sorimachi;Hiroyuki Takahashi

Frequent Co-Authors

Shigeo Uchida
Shigeo Uchida National Institutes for Quantum and Radiological Science and Technology
Peter Bossew
Peter Bossew Federal Office for Radiation Protection
Yasuhito Igarashi
Yasuhito Igarashi Kyoto University
Mizuo Kajino
Mizuo Kajino Japan Meteorological Agency
Jun Kataoka
Jun Kataoka Waseda University
Renjian Zhang
Renjian Zhang Chinese Academy of Sciences
Hiroshi Sasaki
Hiroshi Sasaki Jikei University School of Medicine
Kei Satoh
Kei Satoh Hirosaki University
Tetsuya Mizoue
Tetsuya Mizoue Kyushu University

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