World's Best Scientists 2026 revealed!
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Biology and Biochemistry
Japan
2023

D-Index & Metrics

Microbiology

D-Index
104
Citations
37824
World Ranking
336
National Ranking
6

Koki Horikoshi publication distribution in Microbiology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Microbiology in 2026. The highlighted bar marks where Koki Horikoshi sits on this spectrum.

55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 264 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 233 scientists 205–214 publications: 207 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55 publications 679+

This scientist: 673 publications — 98th percentile

98% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

Koki Horikoshi D-index placement in Microbiology in 2026

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

40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 111 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 122 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 93 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 104 D-Index — 94th percentile

94% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

Research.com Recognitions

  • 2023 - Research.com Biology and Biochemistry in Japan Leader Award

Overview

Koki Horikoshi was affiliated with the Japan Agency for Marine-Earth Science and Technology in Japan. Their research primarily focused on materials science, specifically within the subfields of materials chemistry and cellular and molecular neuroscience.

Their published work addressed topics including photochromic and fluorescence chemistry, porphyrin and phthalocyanine chemistry, as well as photoreceptor and optogenetics research.

Their recent papers included the following:

  • Near-infrared photochemical internalization: design of a distorted zinc phthalocyanine for efficient intracellular delivery of immunotoxins, 2025, RSC Medicinal Chemistry
  • Antimicrobial effects of grapefruit seed extract microfibers against mouse hepatitis virus, Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa, 2024, Journal of Laboratory Animal Science

Koki Horikoshi collaborated frequently with several coauthors throughout their career. These frequent collaborators included:

  • Mikako Hamabe
  • Wakako Dewa
  • Mizue Yuki
  • Eriko Yamada
  • T. Aiba

Their publications appeared in venues such as RSC Medicinal Chemistry and the Journal of Laboratory Animal Science, where they had at least one publication in each.

Best Publications

  • Alkaliphiles: Some Applications of Their Products for Biotechnology

    Koki Horikoshi

  • Rapid detection and quantification of members of the archaeal community by quantitative PCR using fluorogenic probes.

    Ken Takai;Koki Horikoshi

  • Cell proliferation at 122°C and isotopically heavy CH4 production by a hyperthermophilic methanogen under high-pressure cultivation

    Ken Takai;Kentaro Nakamura;Tomohiro Toki;Urumu Tsunogai

  • Biogeographical distribution and diversity of microbes in methane hydrate-bearing deep marine sediments on the Pacific Ocean Margin

    Fumio Inagaki;Takuro Nunoura;Satoshi Nakagawa;Andreas Teske

  • Complete Sequence and Gene Organization of the Genome of a Hyper-thermophilic Archaebacterium, Pyrococcus horikoshii OT3

    Yutaka Kawarabayasi;Mituhiro Sawada;Hiroshi Horikawa;Yuji Haikawa

  • Complete genome sequence of the alkaliphilic bacterium Bacillus halodurans and genomic sequence comparison with Bacillus subtilis

    Hideto Takami;Kaoru Nakasone;Yoshihiro Takaki;Go Maeno

  • Genetic Diversity of Archaea in Deep-Sea Hydrothermal Vent Environments

    Ken Takai;Koki Horikoshi

  • A Pseudomonas thrives in high concentrations of toluene

    Akira Inoue;Koki Horikoshi

  • Microbial Communities Associated with Geological Horizons in Coastal Subseafloor Sediments from the Sea of Okhotsk

    Fumio Inagaki;Masae Suzuki;Ken Takai;Hanako Oida

  • Sulfurovum lithotrophicum gen. nov., sp. nov., a novel sulfur-oxidizing chemolithoautotroph within the e-Proteobacteria isolated from Okinawa Trough hydrothermal sediments

    Fumio Inagaki;Ken Takai;Kenneth H. Nealson;Kenneth H. Nealson;Koki Horikoshi

  • Extremely Barophilic Bacteria Isolated from the Mariana Trench, Challenger Deep, at a Depth of 11,000 Meters

    Chiaki Kato;Lina Li;Yuichi Nogi;Yuka Nakamura

  • Distribution of archaea in a black smoker chimney structure.

    Ken Takai;Tetsushi Komatsu;Fumio Inagaki;Koki Horikoshi

  • Diversity of actinomycetes isolated from Challenger Deep sediment (10,898 m) from the Mariana Trench

    Wasu Pathom-aree;Wasu Pathom-aree;James E. M. Stach;Alan C. Ward;Koki Horikoshi

  • Microbial flora in the deepest sea mud of the Mariana Trench.

    Hideto Takami;Akira Inoue;Fumie Fuji;Koki Horikoshi

  • Sulfurimonas paralvinellae sp. nov., a novel mesophilic, hydrogen- and sulfur-oxidizing chemolithoautotroph within the Epsilonproteobacteria isolated from a deep-sea hydrothermal vent polychaete nest, reclassification of Thiomicrospira denitrificans as Sulfurimonas denitrificans comb. nov. and emended description of the genus Sulfurimonas.

    Ken Takai;Masae Suzuki;Satoshi Nakagawa;Masayuki Miyazaki

  • Purification and some properties of an alkaline xylanase from alkaliphilic Bacillus sp. strain 41M-1.

    S Nakamura;K Wakabayashi;R Nakai;R Aono

  • Sulfurimonas autotrophica gen. nov., sp. nov., a novel sulfur-oxidizing ε-proteobacterium isolated from hydrothermal sediments in the Mid-Okinawa Trough

    Fumio Inagaki;Ken Takai;Hideki Kobayashi;Kenneth H. Nealson;Kenneth H. Nealson

  • Distribution, phylogenetic diversity and physiological characteristics of epsilon-Proteobacteria in a deep-sea hydrothermal field.

    Satoshi Nakagawa;Ken Takai;Fumio Inagaki;Hisako Hirayama

  • Geochemical and microbiological evidence for a hydrogen-based, hyperthermophilic subsurface lithoautotrophic microbial ecosystem (HyperSLiME) beneath an active deep-sea hydrothermal field

    Ken Takai;Toshitaka Gamo;Urumu Tsunogai;Noriko Nakayama

  • Bacterial diversity in deep-sea sediments from different depths

    Lina Li;Chiaki Kato;Koki Horikoshi

  • Estimation of solvent-tolerance of bacteria by the solvent parameter log P

    Akira Inoue;Koki Horikoshi

Frequent Co-Authors

Chiaki Kato
Chiaki Kato Japan Agency for Marine-Earth Science and Technology
Toshiaki Kudo
Toshiaki Kudo Nagasaki University
Ken Takai
Ken Takai Japan Agency for Marine-Earth Science and Technology
Kenneth H. Nealson
Kenneth H. Nealson University of Southern California
Fumio Inagaki
Fumio Inagaki Japan Agency for Marine-Earth Science and Technology
Takuro Nunoura
Takuro Nunoura Japan Agency for Marine-Earth Science and Technology
Yasuhiko Yoshida
Yasuhiko Yoshida Toyo University
Hideki Kobayashi
Hideki Kobayashi Japan Agency for Marine-Earth Science and Technology
William D. Grant
William D. Grant University of Leicester
Alan T. Bull
Alan T. Bull University of Kent

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Related Online Degrees & Career Pathways

Studying Microbiology in the USA opens doors to various interdisciplinary fields and career paths. Many students explore related online degrees to complement their microbiology background. For example, public health programs often attract microbiology graduates, and some universities offer mph online programs with easy admission requirements, making transition smoother for professionals aiming to broaden their expertise.

For those interested in combining healthcare with counseling, pursuing certifications like the ccls certification can enhance career prospects by enabling work directly with children in medical settings. This path highlights the importance of specialized skillsets alongside scientific knowledge.

Additionally, individuals with unique backgrounds or challenges, including those seeking online degrees for felons, can find accessible programs that support reentry into professional fields. These programs demonstrate increased inclusivity in higher education and career development.

Lastly, healthcare professionals interested in integrative approaches may consider how to become a functional medicine nurse practitioner. This career intersects biology, patient care, and alternative medicine—highlighting the diverse opportunities stemming from a microbiology foundation.

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