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Hiroto Okayama

Hiroto Okayama

D-Index & Metrics

Biology and Biochemistry

D-Index
59
Citations
37176
World Ranking
12241
National Ranking
841

Hiroto Okayama 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 Hiroto Okayama 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: 145 publications — 24th percentile

24% of scientists in this discipline score the same or lower.

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

Hiroto Okayama 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 Hiroto Okayama 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: 59 D-Index — 38th percentile

38% of scientists in this discipline score the same or lower.

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

Overview

Hiroto Okayama is affiliated with the University of Tokyo in Japan. Their academic profile and contributions are documented primarily through this institutional association.

While specific publications and detailed research outputs are not listed, the available data does not provide extensive information about this scientist's recent papers, frequent co-authors, or recurring publication venues. The profile also lacks documented book publications, main fields, or subfields of study related to their work.

Similarly, no awards or recognitions have been recorded in the accessible data, and there are no notable topics or themes explicitly associated with their research activities.

Given the absence of extensive publication or collaborative data, the profile of Hiroto Okayama remains limited to their institutional affiliation without further elaboration on the scope or impact of their scientific contributions at this time.

Best Publications

  • Loop-mediated isothermal amplification of DNA

    Tsugunori Notomi;Hiroto Okayama;Harumi Masubuchi;Toshihiro Yonekawa

  • High efficiency transformation of Escherichia coli with plasmids

    Hiroaki Inoue;Hiroshi Nojima;Hiroto Okayama

  • High-efficiency cloning of full-length cDNA.

    H Okayama;P Berg

  • Structure and organization of the hepatitis C virus genome isolated from human carriers

    A Takamizawa;C Mori;I Fuke;S Manabe

  • A cDNA cloning vector that permits expression of cDNA inserts in mammalian cells.

    H Okayama;P Berg

  • Structure and expression of a human oxytocin receptor

    Tadashi K. Kimura;Osamu Tanizawa;Kensaku Mori;Michael J. Brownstein

  • Cdc25A is a novel phosphatase functioning early in the cell cycle

    S Jinno;K Suto;A Nagata;M Igarashi

  • Analysis of a human DNA excision repair gene involved in group A xeroderma pigmentosum and containing a zinc-finger domain

    Kiyoji Tanaka;Naoyuki Miura;Ichiro Satokata;Iwai Miyamoto

  • Id-related genes encoding helix-loop-helix proteins are required for G1 progression and are repressed in senescent human fibroblasts.

    E Hara;T Yamaguchi;H Nojima;T Ide

  • A kinase from fission yeast responsible for blocking mitosis in S phase

    Hiroshi Murakami;Hiroto Okayama

  • Bovine papillomavirus contains multiple transforming genes

    Yu-Chung Yang;Hiroto Okayama;Peter M. Howley

  • Nucleotide sequence of 3-hydroxy-3-methyl-glutaryl coenzyme A reductase, a glycoprotein of endoplasmic reticulum

    Daniel J. Chin;Gregorio Gil;David W. Russell;Laura Liscum

  • Requirement for tyrosine phosphorylation of Cdk4 in Gl arrest induced by ultraviolet irradiation

    Yasuhiko Terada;Masaaki Tatsuka;Shigeki Jinno;Hiroto Okayama

  • Fission yeast Eso1p is required for establishing sister chromatid cohesion during S phase

    Koichi Tanaka;Toshihiro Yonekawa;Yosuke Kawasaki;Mihoko Kai

  • Cloning and sequencing of cDNA of bovine N-acetylglucosamine (beta 1-4)galactosyltransferase.

    Hisashi Narimatsu;Sudhir Sinha;Keith Brew;Hiroto Okayama

  • Elongation factor-1α gene determines susceptibility to transformation

    Masaaki Tatsuka;Hiromi Mitsui;Morimasa Wada;Akihisa Nagata

  • Primary structure of rat chromogranin A and distribution of its mRNA.

    Anna Iacangelo;Hiroto Okayama;Lee E. Eiden

  • Stress signal, mediated by a Hogl-like MAP kinase, controls sexual development in fission yeast

    Tomohisa Kato;Koei Okazaki;Hiroshi Murakami;Sophie Stettler

  • Establishment and maintenance of sister chromatid cohesion in fission yeast by a unique mechanism

    Koichi Tanaka;Zhonglin Hao;Zhonglin Hao;Mihoko Kai;Mihoko Kai;Hiroto Okayama

  • Calcium phosphate transfection.

    Robert E. Kingston;Claudia A. Chen;Hiroto Okayama

Frequent Co-Authors

Hiroshi Nojima
Hiroshi Nojima Osaka University
Hiroyuki Isobe
Hiroyuki Isobe University of Tokyo
Eiichi Nakamura
Eiichi Nakamura University of Tokyo
Osamu Hayaishi
Osamu Hayaishi Osaka Bioscience Institute
Kunihiro Ueda
Kunihiro Ueda Kyoto University
Yoshihide Kanaoka
Yoshihide Kanaoka Brigham and Women's Hospital
Tadashi Kimura
Tadashi Kimura Osaka University
Takenobu Kamada
Takenobu Kamada Osaka University
Koichi Tanaka
Koichi Tanaka Kyoto University
Hiroshi Kawaguchi
Hiroshi Kawaguchi University of Tokyo

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