World's Best Scientists 2026 revealed!
Toyoki Kozai

Toyoki Kozai

D-Index & Metrics

Plant Science and Agronomy

D-Index
62
Citations
13113
World Ranking
1103
National Ranking
32

Overview

What is he best known for?

The fields of study he is best known for:

  • Botany
  • Ecology
  • Horticulture

Botany, Micropropagation, Horticulture, Photosynthesis and Shoot are his primary areas of study. His Botany research integrates issues from Sugar and Sucrose. As part of his studies on Micropropagation, Toyoki Kozai often connects relevant subjects like Somatic embryogenesis.

Toyoki Kozai interconnects Hypericin, Sugar free, Optoelectronics, Multiplication and Hypericum perforatum in the investigation of issues within Horticulture. His Photosynthesis research incorporates themes from Ventilation, Carbon dioxide and Cutting. His research investigates the connection with Shoot and areas like Transpiration which intersect with concerns in Root system, Leafy, Vermiculite and System dynamics.

His most cited work include:

  • Automation and environmental control in plant tissue culture (294 citations)
  • Micropropagation under photoautotrophic conditions (184 citations)
  • Melatonin in Glycyrrhiza uralensis: response of plant roots to spectral quality of light and UV-B radiation. (176 citations)

What are the main themes of his work throughout his whole career to date?

Toyoki Kozai mostly deals with Botany, Horticulture, Micropropagation, Photosynthesis and Greenhouse. His study on Shoot is often connected to Explant culture as part of broader study in Botany. His study in the field of Dry weight, photoperiodism and Cutting also crosses realms of Plantlet.

Micropropagation is a subfield of Tissue culture that Toyoki Kozai explores. The study incorporates disciplines such as Chlorophyll, Carbon dioxide and Plant physiology in addition to Photosynthesis. His work in Greenhouse addresses subjects such as Environmental engineering, which are connected to disciplines such as Coefficient of performance.

He most often published in these fields:

  • Botany (38.51%)
  • Horticulture (34.20%)
  • Micropropagation (22.70%)

What were the highlights of his more recent work (between 2009-2021)?

  • Artificial light (12.64%)
  • Plant factory (5.75%)
  • Greenhouse (16.09%)

In recent papers he was focusing on the following fields of study:

Artificial light, Plant factory, Greenhouse, Photosynthesis and Agricultural engineering are his primary areas of study. His studies deal with areas such as Resource, Light-emitting diode, Horticulture and LED lamp as well as Plant factory. As a member of one scientific family, Toyoki Kozai mostly works in the field of Horticulture, focusing on Shading and, on occasion, Plant density, Leafy vegetables, Senescence and Fresh weight.

His Photosynthesis study improves the overall literature in Botany. The Botany study combines topics in areas such as Airflow and Animal science. The various areas that he examines in his Agricultural engineering study include Plant production, Vertical farming, Root mass and Hydroponic culture.

Between 2009 and 2021, his most popular works were:

  • Resource use efficiency of closed plant production system with artificial light: Concept, estimation and application to plant factory (122 citations)
  • Development and application of photoautotrophic micropropagation plant system (95 citations)
  • Plant Factory: An Indoor Vertical Farming System for Efficient Quality Food Production (66 citations)

In his most recent research, the most cited papers focused on:

  • Botany
  • Ecology
  • Mechanical engineering

His primary areas of investigation include Photosynthesis, Greenhouse, Botany, Plant factory and Artificial light. He conducts interdisciplinary study in the fields of Photosynthesis and Micropropagation through his works. His Greenhouse research is multidisciplinary, incorporating perspectives in Heat transfer, Outside air temperature and Electric potential energy.

His Botany research is multidisciplinary, relying on both Airflow and Horticulture. His work on Leafy vegetables, Plant density and Sowing is typically connected to Ascorbic acid as part of general Horticulture study, connecting several disciplines of science. His research in Plant factory tackles topics such as Electricity which are related to areas like Agricultural engineering and Mechanical engineering.

Best Publications

  • Plant Factory: An Indoor Vertical Farming System for Efficient Quality Food Production

    Toyoki Kozai

  • Resource use efficiency of closed plant production system with artificial light: Concept, estimation and application to plant factory

    Toyoki Kozai

  • Automation and environmental control in plant tissue culture

    Jenny Aitken-Christie;Toyoki Kozai;Mary Ann Lila Smith

  • Micropropagation under photoautotrophic conditions

    T. Kozai

  • Temperature stress can alter the photosynthetic efficiency and secondary metabolite concentrations in St. John's wort.

    S.M.A. Zobayed;F. Afreen;T. Kozai

  • Melatonin in Glycyrrhiza uralensis: response of plant roots to spectral quality of light and UV-B radiation.

    F. Afreen;S. M. A. Zobayed;T. Kozai

  • Fundamental Studies on Environments in Plant Tissue Culture Vessels

    Kazuhiro Fujiwara;Toyoki Kozai;Ichiro Watanabe

  • Phytochemical and physiological changes in the leaves of St. John's wort plants under a water stress condition

    S.M.A. Zobayed;F. Afreen;T. Kozai

  • Development and application of photoautotrophic micropropagation plant system

    Yulan Xiao;Genhua Niu;Toyoki Kozai

  • Multiplication of potato plantlets in vitro with sugar free medium under high photosynthetic photon flux.

    T. Kozai;Y. Koyama;I. Watanabe

  • Effects of CO2 Enrichment and Sucrose Concentration Under High Photon Fluxes on Plantlet Growth of Carnation (Dianthus caryophyllus L.) in Tissue Culture During the Preparation Stage

    Toyoki Kozai;Yoshie Iwanami

  • DEVELOPMENT OF A PHOTOAUTOTROPHIC TISSUE CULTURE SYSTEM FOR SHOOTS AND/OR PLANTLETS AT ROOTING AND ACCLIMATIZATION STAGES

    K. Fujiwara;T. Kozai;I. Watanabe

  • LED lighting for urban agriculture

    Toyoki Kozai;Kazuhiro Fujiwara;Erik S. Runkle

  • Environmental control for the large-scale production of plants through in vitro techniques

    Toyoki Kozai;Chieri Kubota;Byoung Ryoung Jeong

  • Plant-environment interactions: Accumulation of hypericin in dark glands of Hypericum perforatum.

    S. M. A. Zobayed;F. Afreen;E. Goto;T. Kozai

  • Effects of CO 2 enrichment and supporting material in vitro on photoautotrophic growth of Eucalyptus plantlets in vitro and ex vitro

    C. Kirdmanee;Y. Kitaya;T. Kozai

  • Automation in plant tissue culture — general introduction and overview —

    Jenny Aitken-Christie;Toyoki Kozai;Shinsaku Takayama

  • Transplant Production Systems

    K. Kurata;T. Kozai

  • Fundamental studies on environments in plant tissue culture vessels, 2: Effects of stoppers and vessels on gas exchange rates between inside and outside of vessels closed with stoppers.

    T Kozai;K Fujiwara;I Watanabe

  • Physical microenvironment and its effects

    Kazuhiro Fujiwara;Toyoki Kozai

  • Photosynthetic Photon Flux, Photoperiod, and CO2 Concentration Affect Growth and Morphology of Lettuce Plug Transplants

    Yoshiaki Kitaya;Genhua Niu;Toyoki Kozai;Maki Ohashi

Frequent Co-Authors

Chieri Kubota
Chieri Kubota The Ohio State University
Genhua Niu
Genhua Niu Texas A&M University
Wataru Yamori
Wataru Yamori University of Tokyo
Kee-Yoeup Paek
Kee-Yoeup Paek Chungbuk National University
Tess Astatkie
Tess Astatkie Dalhousie University
Erik S. Runkle
Erik S. Runkle Michigan State University
Eun-Joo Hahn
Eun-Joo Hahn Chungbuk National University

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