World's Best Scientists 2026 revealed!
Chiharu Tohyama

Chiharu Tohyama

D-Index & Metrics

Environmental Sciences

D-Index
52
Citations
12103
World Ranking
4424
National Ranking
72

Chiharu Tohyama 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 Chiharu Tohyama 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: 179 publications — 56th percentile

56% of scientists in this discipline score the same or lower.

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

Chiharu Tohyama 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 Chiharu Tohyama 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: 52 D-Index — 55th percentile

55% of scientists in this discipline score the same or lower.

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

Best Publications

  • The 2005 World Health Organization reevaluation of human and Mammalian toxic equivalency factors for dioxins and dioxin-like compounds.

    Martin Van den Berg;Linda S. Birnbaum;Michael Denison;Mike De Vito

  • Modulation of oestrogen receptor signalling by association with the activated dioxin receptor.

    Fumiaki Ohtake;Ken-ichi Takeyama;Takahiro Matsumoto;Hirochika Kitagawa

  • Metallothionein in radiation exposure: its induction and protective role.

    Unknown

  • Polybrominated dibenzo-p-dioxins, dibenzofurans, and biphenyls: inclusion in the toxicity equivalency factor concept for dioxin-like compounds.

    Martin van den Berg;Michael S. Denison;Linda S. Birnbaum;Michael J. DeVito

  • Bisphenol-A Affects Spermatogenesis in the Adult Rat Even at a Low Dose.

    Unknown

  • Distinct response to dioxin in an arylhydrocarbon receptor (AHR)-humanized mouse

    Takashi Moriguchi;Hozumi Motohashi;Tomonori Hosoya;Osamu Nakajima

  • Maternal Exposure to a Low Dose of 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) Suppressed the Development of Reproductive Organs of Male Rats: Dose-Dependent Increase of mRNA Levels of 5α-Reductase Type 2 in Contrast to Decrease of Androgen Receptor in the Pubertal Ventral Prostate

    Unknown

  • Cross-Talk between 2,3,7,8-Tetrachlorodibenzo-p-dioxin and Testosterone Signal Transduction Pathways in LNCaP Prostate Cancer Cells

    N.R. Jana;S. Sarkar;M. Ishizuka;J. Yonemoto

  • Reduction of metallothioneins promotes the disease expression of familial amyotrophic lateral sclerosis mice in a dose-dependent manner

    Seiichi Nagano;Masahiko Satoh;Hisae Sumi;Harutoshi Fujimura

  • Developmental neurotoxicity of dioxin and its related compounds.

    Unknown

  • Aryl hydrocarbon receptor-mediated effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin on glucose-stimulated insulin secretion in mice.

    Hisaka Kurita;Wataru Yoshioka;Noriko Nishimura;Naoto Kubota

  • Effects of vinclozolin administration on sperm production and testosterone biosynthetic pathway in adult male rat.

    Unknown

  • Enhanced Renal Toxicity by Inorganic Mercury in Metallothionein-Null Mice

    Unknown

  • A constitutively active arylhydrocarbon receptor induces growth inhibition of jurkat T cells through changes in the expression of genes related to apoptosis and cell cycle arrest.

    Tomohiro Ito;Shin Ichi Tsukumo;Norio Suzuki;Hozumi Motohashi

  • Stabilization of mutant Cu/Zn superoxide dismutase (SOD1) protein by coexpressed wild SOD1 protein accelerates the disease progression in familial amyotrophic lateral sclerosis mice.

    Kei Fukada;Seiichi Nagano;Masahiko Satoh;Chiharu Tohyama

  • Altered thyroxin and retinoid metabolic response to 2,3,7,8-tetrachlorodibenzo-p-dioxin in aryl hydrocarbon receptor-null mice.

    Unknown

  • Induction of spermatogenic cell apoptosis in prepubertal rat testes irrespective of testicular steroidogenesis: a possible estrogenic effect of di(n-butyl) phthalate

    Unknown

  • Executive function deficits and social-behavioral abnormality in mice exposed to a low dose of dioxin in utero and via lactation.

    Toshihiro Endo;Masaki Kakeyama;Yukari Uemura;Asahi Haijima

  • Molecular targets that link dioxin exposure to toxicity phenotypes

    Wataru Yoshioka;Richard E. Peterson;Chiharu Tohyama

  • In utero and Lactational Exposure to Acetamiprid Induces Abnormalities in Socio-Sexual and Anxiety-Related Behaviors of Male Mice

    Kazuhiro Sano;Tomohiko Isobe;Jiaxin Yang;Tin-Tin Win-Shwe

Frequent Co-Authors

Richard E. Peterson
Richard E. Peterson University of Wisconsin–Madison
Kazunori Nakajima
Kazunori Nakajima Keio University
Kazuo T. Suzuki
Kazuo T. Suzuki Chiba University
Masayuki Yamamoto
Masayuki Yamamoto Tohoku University
Hozumi Motohashi
Hozumi Motohashi Tohoku University
Tadashi Baba
Tadashi Baba University of Tsukuba
Heidelore Fiedler
Heidelore Fiedler Örebro University
Mats Tysklind
Mats Tysklind Umeå University
Linda S. Birnbaum
Linda S. Birnbaum Research Triangle Park Foundation
David L. Adelson
David L. Adelson University of Adelaide

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Related Online Degrees & Career Pathways

For those interested in Environmental Sciences, pursuing related online degrees can open diverse career opportunities. Many students seek an accredited affordable online general studies degree as a flexible starting point. These programs provide a broad foundation while keeping education costs manageable.

Some learners may prefer the easiest bachelors degree options within environmental fields to balance their studies with other commitments. Selecting a degree that matches one’s learning style and goals can lead to better academic success.

Specialized paths also exist, such as an online geoscience degree, which focuses on earth systems and natural resources. This is ideal for careers in research, conservation, and resource management.

Additionally, incorporating Geographic Information Systems (GIS) skills is highly valuable. Many colleges with GIS programs offer online courses that enhance spatial analysis expertise, a key tool in environmental assessment and planning.

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