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Hiroshi Kouchi

Hiroshi Kouchi

University of Tsukuba
Japan

D-Index & Metrics

Biology and Biochemistry

D-Index
55
Citations
10817
World Ranking
15061
National Ranking
1063

Hiroshi Kouchi 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 Hiroshi Kouchi 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: 174 publications — 38th percentile

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

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

Hiroshi Kouchi 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 Hiroshi Kouchi 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: 55 D-Index — 25th percentile

25% of scientists in this discipline score the same or lower.

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

Overview

Hiroshi Kouchi is affiliated with the University of Tsukuba in Japan. Their research primarily spans the Agricultural and Biological Sciences, with a strong focus on Plant Science, Agronomy and Crop Science, Ecology, and Catalysis. Kouchi's scholarly work addresses several main topics including Legume Nitrogen Fixing Symbiosis, Plant nutrient uptake and metabolism, Nematode management and characterization studies, Agronomic Practices and Intercropping Systems, Coastal wetland ecosystem dynamics, and Ammonia Synthesis and Nitrogen Reduction.

Recent publications by Kouchi include studies published between 2023 and 2024 in peer-reviewed journals. These papers are:

  • Both incompatible and compatible rhizobia inhabit the intercellular spaces of leguminous root nodules (2023), published in Plant Signaling & Behavior
  • Characterization of photosynthetic Bradyrhizobium sp. strain SSBR45 isolated from the root nodules of Aeschynomene indica (2023), published in Plant Signaling & Behavior
  • A mitochondrial metalloprotease FtsH4 is required for symbiotic nitrogen fixation in Lotus japonicus nodules (2024), published in Scientific Reports

Kouchi frequently publishes in the journals Plant Signaling & Behavior and Scientific Reports. The scientific collaboration network of Kouchi includes several frequent co-authors, such as Shingo Hata, Risa Tsuda, Serina Kojima, Aiko Tanaka, and Nanami Kawajiri. These collaborators have contributed to multiple joint research projects and publications.

The research portfolio of Kouchi reflects an interdisciplinary approach within biological sciences, linking molecular mechanisms of symbiosis with broader agricultural and ecological contexts. Their work on nitrogen fixation involves exploring both compatible and incompatible bacterial symbionts in legume root nodules, indicating an interest in the cellular and biochemical interactions integral to plant-microbe relationships.

Kouchi's contributions also extend to the study of photosynthetic bacteria associated with plant roots, as well as the role of mitochondrial proteins in the nitrogen fixation process within nodules. This range of topics highlights their involvement in understanding the fundamental biological processes that support sustainable agricultural practices and ecosystem function.

Best Publications

  • Isolation and characterization of novel nodulin cDNAs representing genes expressed at early stages of soybean nodule development

    Hiroshi Kouchi;Shingo Hata

  • HAR1 mediates systemic regulation of symbiotic organ development

    Rieko Nishimura;Masaki Hayashi;Guo-Jiang Wu;Guo-Jiang Wu;Hiroshi Kouchi

  • Deregulation of a Ca2+/calmodulin-dependent kinase leads to spontaneous nodule development.

    Leïla Tirichine;Haruko Imaizumi-Anraku;Satoko Yoshida;Yasuhiro Murakami

  • Plastid proteins crucial for symbiotic fungal and bacterial entry into plant roots

    Haruko Imaizumi-Anraku;Naoya Takeda;Myriam Charpentier;Myriam Charpentier;Jillian Perry

  • NUCLEOPORIN85 is required for calcium spiking, fungal and bacterial symbioses, and seed production in Lotus japonicus.

    Katsuharu Saito;Makoto Yoshikawa;Koji Yano;Hiroki Miwa

  • NODULE INCEPTION Directly Targets NF-Y Subunit Genes to Regulate Essential Processes of Root Nodule Development in Lotus japonicus

    Takashi Soyano;Hiroshi Kouchi;Atsuko Hirota;Makoto Hayashi

  • Plant cyclins: a unified nomenclature for plant A-, B- and D-type cyclins based on sequence organization.

    Jean Pierre Renaudin;John H. Doonan;Donna Freeman;Junji Hashimoto

  • How many peas in a pod? Legume genes responsible for mutualistic symbioses underground.

    Hiroshi Kouchi;Haruko Imaizumi-Anraku;Makoto Hayashi;Tsuneo Hakoyama

  • Large-scale analysis of gene expression profiles during early stages of root nodule formation in a model legume, Lotus japonicus.

    Hiroshi Kouchi;Kenshiro Shimomura;Shingo Hata;Atsuko Hirota

  • Gene silencing by expression of hairpin RNA in Lotus japonicus roots and root nodules.

    Hirotaka Kumagai;Hiroshi Kouchi

  • From defense to symbiosis: limited alterations in the kinase domain of LysM receptor‐like kinases are crucial for evolution of legume–Rhizobium symbiosis

    Tomomi Nakagawa;Hanae Kaku;Yoshikazu Shimoda;Akifumi Sugiyama

  • Rice ENOD40: isolation and expression analysis in rice and transgenic soybean root nodules

    Hiroshi Kouchi;Ken-ichi Takane;Rollando B.. So;Jagdish K.. Ladha

  • A dominant function of CCaMK in intracellular accommodation of bacterial and fungal endosymbionts

    Teruyuki Hayashi;Mari Banba;Yoshikazu Shimoda;Hiroshi Kouchi

  • Positional Cloning Identifies Lotus japonicus NSP2, A Putative Transcription Factor of the GRAS Family, Required for NIN and ENOD40 Gene Expression in Nodule Initiation

    Yasuhiro Murakami;Hiroki Miwa;Haruko Imaizumi-Anraku;Hiroshi Kouchi

  • Expression of the early nodulin, ENOD40, in soybean roots in response to various lipo‐chitin signal molecules

    Eiichi Minami;Hiroshi Kouchi;Jonathan R. Cohn;Tomoya Ogawa

  • A supernodulating mutant isolated from soybean cultivar enrei

    Shoichiro Akao;Hiroshi Kouchi

  • Too much love, a root regulator associated with the long-distance control of nodulation in Lotus japonicus.

    Shimpei Magori;Erika Oka-Kira;Satoshi Shibata;Yosuke Umehara

  • Divergence of Evolutionary Ways Among Common sym Genes : CASTOR and CCaMK Show Functional Conservation Between Two Symbiosis Systems and Constitute the Root of a Common Signaling Pathway

    Mari Banba;Caroline Gutjahr;Akio Miyao;Hirohiko Hirochika

  • The AtVAM3 Encodes a Syntaxin-related Molecule Implicated in the Vacuolar Assembly in Arabidopsis thaliana

    Masa H. Sato;Norihiro Nakamura;Yoshinori Ohsumi;Hiroshi Kouchi

  • Host plant genome overcomes the lack of a bacterial gene for symbiotic nitrogen fixation

    Tsuneo Hakoyama;Kaori Niimi;Hirokazu Watanabe;Ryohei Tabata

Frequent Co-Authors

Masayoshi Kawaguchi
Masayoshi Kawaguchi National Institute for Basic Biology
Katsura Izui
Katsura Izui Kindai University
Tadakatsu Yoneyama
Tadakatsu Yoneyama Tohoku University
Shusei Sato
Shusei Sato Tohoku University
Makoto Hayashi
Makoto Hayashi RIKEN
Jens Stougaard
Jens Stougaard Aarhus University
Martin Parniske
Martin Parniske Ludwig-Maximilians-Universität München
Satoshi Tabata
Satoshi Tabata Tokyo University of Science
Kyuya Harada
Kyuya Harada University of Tsukuba
Erika Asamizu
Erika Asamizu University of Tsukuba

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Best Scientists Citing Hiroshi Kouchi

Shusei Sato

Shusei Sato

Tohoku University

Publications: 95

Masayoshi Kawaguchi

Masayoshi Kawaguchi

National Institute for Basic Biology

Publications: 90

Jens Stougaard

Jens Stougaard

Aarhus University

Publications: 81

Giles E. D. Oldroyd

Giles E. D. Oldroyd

University of Cambridge

Publications: 72

Peter M. Gresshoff

Peter M. Gresshoff

University of Queensland

Publications: 66

Martin Parniske

Martin Parniske

Ludwig-Maximilians-Universität München

Publications: 63

Ton Bisseling

Ton Bisseling

Wageningen University & Research

Publications: 59

Michael K. Udvardi

Michael K. Udvardi

Oak Ridge National Laboratory

Publications: 57

Gary Stacey

Gary Stacey

University of Missouri

Publications: 40

Makoto Hayashi

Makoto Hayashi

RIKEN

Publications: 38

Yasuo Nagato

Yasuo Nagato

University of Tokyo

Publications: 37

Dirk Inzé

Dirk Inzé

Ghent University

Publications: 37

J. Allan Downie

J. Allan Downie

John Innes Centre

Publications: 35

Brett J. Ferguson

Brett J. Ferguson

University of Queensland

Publications: 34

Satoshi Tabata

Satoshi Tabata

Tokyo University of Science

Publications: 31

Martin Crespi

Martin Crespi

University of Paris-Saclay

Publications: 31

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