World's Best Scientists 2026 revealed!
Takashi Hirayama

Takashi Hirayama

D-Index & Metrics

Biology and Biochemistry

D-Index
50
Citations
15727
World Ranking
17432
National Ranking
1258

Takashi Hirayama 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 Takashi Hirayama sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 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: 418 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: 197 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: 60 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 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 129 publications — 16th percentile

16% of scientists in this discipline score the same or lower.

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

Takashi Hirayama 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 Takashi Hirayama sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 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: 72 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 D-Index 167+

This scientist: 50 D-Index — 11th percentile

11% of scientists in this discipline score the same or lower.

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

Overview

Takashi Hirayama is affiliated with Okayama University in Japan and has a research focus within the field of Agricultural and Biological Sciences. Their work is strongly concentrated on Plant Science, with additional contributions in Molecular Biology, Genetics, Computational Theory and Mathematics, and Global and Planetary Change.

Their research encompasses several main topics, including:

  • Plant Molecular Biology Research
  • Plant Stress Responses and Tolerance
  • Genetic Mapping and Diversity in Plants and Animals
  • Radioactive contamination and transfer
  • Radioactivity and Radon Measurements
  • Wheat and Barley Genetics and Pathology
  • Plant Disease Resistance and Genetics

Recent publications under their authorship highlight the range of their work. These include:

  • The barley pan-genome reveals the hidden legacy of mutation breeding, 2020, Nature
  • Plant Hormonomics: A Key Tool for Deep Physiological Phenotyping to Improve Crop Productivity, 2022, Plant and Cell Physiology
  • BdWRKY38 is required for the incompatible interaction of Brachypodium distachyon with the necrotrophic fungus Rhizoctonia solani, 2020, The Plant Journal
  • Decoding Plant-Environment Interactions That Influence Crop Agronomic Traits, 2020, Plant and Cell Physiology
  • Temperature-dependent fasciation mutants provide a link between mitochondrial RNA processing and lateral root morphogenesis, 2021, eLife

Hirayama's frequent coauthors include Keiichi Mochida, Takashi Saito, Katsuhisa Yamanaka, Yukiko Uehara-Yamaguchi, and Kotaro Takahagi. Collaborative efforts with these researchers have contributed significantly to their published body of work.

Their publications are commonly found in several scientific venues, reflecting a consistent presence in specific journals. The most frequent venues are:

  • Plant and Cell Physiology
  • The Plant Journal
  • International Journal of Molecular Sciences
  • Annals of the Rheumatic Diseases
  • Nature

Best Publications

  • EIN2, a bifunctional transducer of ethylene and stress responses in Arabidopsis.

    Jose M. Alonso;Takashi Hirayama;Gregg Roman;Saeid Nourizadeh

  • Research on plant abiotic stress responses in the post‐genome era: past, present and future

    Takashi Hirayama;Kazuo Shinozaki

  • Type 2C protein phosphatases directly regulate abscisic acid-activated protein kinases in Arabidopsis

    Taishi Umezawa;Naoyuki Sugiyama;Masahide Mizoguchi;Shimpei Hayashi

  • A gene encoding a mitogen-activated protein kinase kinase kinase is induced simultaneously with genes for a mitogen-activated protein kinase and an S6 ribosomal protein kinase by touch, cold, and water stress in Arabidopsis thaliana.

    Tsuyoshi Mizoguchi;Kenji Irie;Takashi Hirayama;Nobuaki Hayashida

  • A Transmembrane Hybrid-Type Histidine Kinase in Arabidopsis Functions as an Osmosensor

    Takeshi Urao;Bakhtiyor Yakubov;Rie Satoh;Kazuko Yamaguchi-Shinozaki

  • Perception and transduction of abscisic acid signals: keys to the function of the versatile plant hormone ABA

    Takashi Hirayama;Kazuo Shinozaki

  • The barley pan-genome reveals the hidden legacy of mutation breeding.

    Murukarthick Jayakodi;Sudharsan Padmarasu;Georg Haberer;Venkata Suresh Bonthala

  • RESPONSIVE-TO-ANTAGONIST1, a Menkes/Wilson Disease–Related Copper Transporter, Is Required for Ethylene Signaling in Arabidopsis

    Takashi Hirayama;Joseph J. Kieber;Noriko Hirayama;Mikhail Kogan

  • ABA-Hypersensitive Germination3 Encodes a Protein Phosphatase 2C (AtPP2CA) That Strongly Regulates Abscisic Acid Signaling during Germination among Arabidopsis Protein Phosphatase 2Cs

    Tomo Yoshida;Noriyuki Nishimura;Nobutaka Kitahata;Takashi Kuromori

  • Zinc finger protein STOP1 is critical for proton tolerance in Arabidopsis and coregulates a key gene in aluminum tolerance.

    Satoshi Iuchi;Hiroyuki Koyama;Atsuko Iuchi;Yasufumi Kobayashi

  • A gene encoding a phosphatidylinositol-specific phospholipase C is induced by dehydration and salt stress in Arabidopsis thaliana.

    Takashi Hirayama;Chikara Ohto;Tsuyoshi Mizoguchi;Kazuo Shinozaki

  • AtIPT3 is a Key Determinant of Nitrate-Dependent Cytokinin Biosynthesis in Arabidopsis

    Kentaro Takei;Nanae Ueda;Koh Aoki;Takashi Kuromori

  • An ABRE promoter sequence is involved in osmotic stress-responsive expression of the DREB2A gene, which encodes a transcription factor regulating drought-inducible genes in Arabidopsis

    June Sik Kim;Junya Mizoi;Takuya Yoshida;Yasunari Fujita

  • ABA-Hypersensitive Germination1 encodes a protein phosphatase 2C, an essential component of abscisic acid signaling in Arabidopsis seed.

    Noriyuki Nishimura;Tomo Yoshida;Nobutaka Kitahata;Tadao Asami

  • Elucidation of the RNA Recognition Code for Pentatricopeptide Repeat Proteins Involved in Organelle RNA Editing in Plants

    Yusuke Yagi;Shimpei Hayashi;Keiko Kobayashi;Takashi Hirayama

  • A collection of 11 800 single-copy Ds transposon insertion lines in Arabidopsis.

    Takashi Kuromori;Takashi Hirayama;Yuki Kiyosue;Hiroko Takabe

  • Hyperosmotic stress induces a rapid and transient increase in inositol 1,4,5-trisphosphate independent of abscisic acid in Arabidopsis cell culture.

    Seiji Takahashi;Takeshi Katagiri;Takashi Hirayama;Kazuko Yamaguchi-Shinozaki

  • Computer vision-based phenotyping for improvement of plant productivity: a machine learning perspective

    Keiichi Mochida;Satoru Koda;Komaki Inoue;Takashi Hirayama

  • Analysis of ABA hypersensitive germination2 revealed the pivotal functions of PARN in stress response in Arabidopsis

    Noriyuki Nishimura;Nobutaka Kitahata;Motoaki Seki;Yoshihiro Narusaka

  • ABA-Hypersensitive Germination3 Encodes a Protein Phosphatase 2C (AtPP2CA) That Strongly Regulates Abscisic Acid Signaling during Germination among

    Tomo Yoshida;Noriyuki Nishimura;Nobutaka Kitahata;Takashi Kuromori

Frequent Co-Authors

Takashi Kuromori
Takashi Kuromori Okayama University
Jun Kikuchi
Jun Kikuchi Yokohama City University
Izumi C. Mori
Izumi C. Mori Okayama University
Tadao Asami
Tadao Asami University of Tokyo
Kazuko Yamaguchi-Shinozaki
Kazuko Yamaguchi-Shinozaki University of Tokyo
Takashi Ueda
Takashi Ueda National Institute for Basic Biology
Ko Noguchi
Ko Noguchi Tokyo University of Pharmacy and Life Sciences

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