J-GLOBAL         Last updated: Dec 13, 2018 at 10:12
Osaka Prefecture University
Graduate School of Life and Environmental Sciences
Job title
Associate Professor
Dr. of aguriculture(Chiba University)

Research Interests


Research Areas



Graduate School, Division of National Science and Technology, Chiba University
Faculty of Horticulture, Chiba University

Published Papers

Nhung Ngoc Hoang, Yoshiaki Kitaya, Toshio Shibuya, Ryosuke Endo
Scientia Horticulturae   245 237-243   Feb 2019
© 2018 The growth of wasabi (Wasabia japonica Matsumura) plantlets was compared in four concentrations of standard Enshi nutrient solution (25%, 50%, 100%, and 150%) and two kinds of supporting materials (rockwool and vermiculite) using an in vitr...
T. Shibuya, K. Kano, R. Endo, Y. Kitaya
Photosynthetica   56 893-900   Sep 2018
© 2017, The Institute of Experimental Botany. We studied growth and photosynthesis of cucumber (Cucumis sativus) seedlings under two vapor-pressure deficit levels (VPD; 0.4 and 3.0 kPa), two salinity levels (0 mM and 34 mM NaCl), and two CO2concen...
Johshin Tsuruyama, Toshio Shibuya
HortTechnology   28 453-458   Aug 2018
© 2018, American Society for Horticultural Science. All rights reserved. The present study investigated growth properties and flowering response of seed-propagated strawberry (Fragaria ×ananassa) seedlings under artificial lighting with different ...
Kaori Itagaki, Toshio Shibuya
Botany   96 67-71   Jan 2018
© 2017, Published by NRC Research Press. This research investigated early hyphal development of cucurbit powdery mildew (Podosphaera xanthii) on leaves of cucumber (Cucumis sativus L.) acclimatized to different relative humidities to clarify the f...
Kenji Takemura, Ryosuke Endo, Toshio Shibuya, Yoshiaki Kitaya
Environmental Technology (United Kingdom)   38 2273-2279   Sep 2017
© 2016 Informa UK Limited, trading as Taylor & Francis Group. We investigated the possibility of using Euglena gracilis to convert digestate from methane fermentation of organic wastes into a medium for soilless crop culture. The growth of E. gr...
Nhung Ngoc Hoang, Yoshiaki Kitaya, Teruyuki Morishita, Ryosuke Endo, Toshio Shibuya
Plant Cell, Tissue and Organ Culture   130 255-263   Aug 2017
© 2017, Springer Science+Business Media Dordrecht. The growth of wasabi (Wasabia japonica Matsumura) plantlets under different micro-environments inside culture vessels in photoautotrophic micropropagation (PA) and photomixotrophic micropropagatio...
Toshio Shibuya, Kenji Kano, Ryosuke Endo, Yoshiaki Kitaya
Horticulture Journal   86 334-339   Jan 2017
© 2017 The Japanese Society for Horticultural Science (JSHS), All rights reserved. Hardening with a high vapor-pressure-deficit (VPD) can decrease conductance (gs) and thereby enhance drought tolerance by reducing transpiration, which is particula...
Toshio Shibuya, Saki Kishigami, Shuji Takahashi, Ryosuke Endo, Yoshiaki Kitaya
Scientia Horticulturae   213 49-54   Dec 2016
© 2016 Elsevier B.V. We evaluated the dynamics of light competition within dense cucumber (Cucumis sativus L.) plant stands and its relationship to subsequent growth under illumination with different red to far-red ratios (R:FRs). The plant stands...
Toshio Shibuya, Ryosuke Endo, Yoshiaki Kitaya, Saki Hayashi
HortScience   51 843-846   Jul 2016
© 2016 American Society for Horticultural Science. All rights reserved. Light with a higher red to far-red ratio (R:FR) than sunlight reduces plant growth, but the cause has not been firmly established. In the present study, cucumber seedlings wer...
Kaori Itagaki, Kaori Itagaki, Toshio Shibuya, Motoaki Tojo, Ryosuke Endo, Yoshiaki Kitaya
HortScience   51 530-536   May 2016
© 2016, American Society for Horticultural Science. All rights reserved. The development of powdery mildew fungus (Podosphaera xanthii) is suppressed on cucumber (Cucumis sativus L.) seedlings acclimatized to higher red-to-far-red ratio (R:FR) tha...
Kenji Takemura, Ryosuke Endo, Toshio Shibuya, Yoshiaki Kitaya
Journal of Residuals Science and Technology   13 207-214   Jan 2016
© 2016 DEStech Publications, Inc. The goal of this study was to establish a system for converting digestate from anaerobic digestion processes into liquid fertilizer for soilless culture. Modifications of concentrations of plant macronutrient ions...
T. Shibuya, K. Itagaki, S. Ueyama, N. Hirai, R. Endo
Journal of Economic Entomology   109 255-258   Jan 2016
© The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. We investigated the effects of morphology of host cucumber, Cucumis sativus L., leaves acclimatized to different atmospher...
Toshio Shibuya, Kaori Itagaki, Yu Wang, Ryosuke Endo
Scientia Horticulturae   192 197-199   Aug 2015
© 2015 Elsevier B.V. Grafting can improve the resistance of scions to foliar diseases, but the exact mechanism is unknown. We hypothesized that responses to a quantitative change in water relations due to transient disconnection of vascular tissue...
Kaori Itagaki, Toshio Shibuya, Motoaki Tojo, Ryosuke Endo, Yoshiaki Kitaya
HortScience   50 1662-1665   Jan 2015
© 2015 American Society for Horticultural Science. All rights reserved. The present study evaluated the development of powdery mildew fungus (Podosphaera xanthii) on leaves of cucumber (Cucumis sativus L.) acclimatized to different CO2concentratio...
T. Shibuya, R. Endo, T. Yuba, Y. Kitaya
Biologia Plantarum   59 198-200   Jan 2014
© 2015, Springer Science+Business Media Dordrecht. We compared photosynthetic performance between cucumber (Cucumis sativus L.) leaves acclimated to saturating irradiances with high red: far red (R:FR = 10) and normal R:FR (= 1.4) ratios. The net ...
Toshio Shibuya, Toru Taniguchi, Shuhei Tsukuda, Shuji Shiozaki, Kaori Itagaki
New Forests   45 589-602   Jan 2014
To improve the propagation of Japanese cedar (Cryptomeria japonica D. Don), we investigated the effects of apical and basal temperatures during a water soaking treatment on the adventitious root formation of 70-mm long shoot tip cuttings which hav...
Kaori Itagaki, Toshio Shibuya, Motoaki Tojo, Ryosuke Endo, Yoshiaki Kitaya
European Journal of Plant Pathology   138 113-121   Jan 2014
This study investigated the effects of atmospheric moisture on conidia development in cucurbit powdery mildew fungus (Podosphaera xanthii) through host-plant responses. Cucumber (Cucumis sativus L.) seedlings were grown under a high vapour pressur...
Siqinbatu, Yoshiaki Kitaya, Hiroaki Hirai, Ryosuke Endo, Toshio Shibuya
Field Crops Research   152 36-43   Oct 2013
We investigated the effects of the soil moisture and gaseous environment on growth of sweet potato during its establishment period in order to confirm the hypothesis that elevated CO2concentrations in the root zone associated with elevated soil wa...
Toshio Shibuya, Shuji Takahashi, Ryosuke Endo, Yoshiaki Kitaya
Scientia Horticulturae   160 65-69   Aug 2013
This study investigated the effects of illumination with different red-to-far-red ratios (R:FR) on height convergence pattern in cucumber (Cucumis sativus L.) seedling stands to obtain a basic knowledge for growing plant stands uniformly under art...
N. Khanh, Y. Kitaya, L. Xiao, R. Endo, T. Shibuya
Environmental Technology (United Kingdom)   34 2039-2045   Jul 2013
The effects of digestate on the growth rates of Euglena gracilis, Chlorella vulgaris, and Dunaliella tertiolecta were investigated to select suitable microalgae for culturing with digestate from methane fermentation. Microalgae were cultured in an...
Toshio Shibuya, Shuhei Tsukuda, Ayako Tokuda, Shuji Shiozaki, Ryosuke Endo, Yoshiaki Kitaya
Journal of Forest Research   18 279-284   Jun 2013
We investigated the effects of warming the basal ends of Carolina poplar (Populus × canadensis Moench.) softwood cuttings at controlled low-air-temperature on their root growth and leaf damage after planting. The warming treatment was applied to t...
T. Shibuya, R. Endo, N. Hayashi, Y. Kitaya
Photosynthetica   50 623-629   Nov 2012
This study evaluated the photosynthetic responses of Cucumis sativus leaves acclimated to illumination from three-band white fluorescent lamps with a high red:far-red (R:FR) ratio (R:FR = 10. 5) and the photosynthetic responses of leaves acclimate...
Toshio Shibuya, Kaori Itagaki, Motoaki Tojo, Ryosuke Endo, Yoshiaki Kitaya
HortScience   46((3)) 429–431-431   Mar 2011
We investigated the effects of fluorescent illumination with a high red-to-far-red ratio (R:FR) on the resistance of cucumber (Cucumis sativus) seedlings to powdery mildew fungus (Sphaerotheca cucurbitae; PM). Seedlings were grown at a photosynthe...
Toshio Shibuya, Junki Komuro, Norio Hirai, Yoshiko Sakamoto, Ryosuke Endo, Yoshiaki Kitaya
HortTechnology   20(5) 873-876   Oct 2010
We evaluated the preference of adult sweetpotato whitefly [SPWF (Bemisia tabaci biotype B)] to cucumber (Cucumis sativus) seedlings grown under fluorescent lamps (FLs) or metal-halide lamps (MLs) that provided a spectrum similar to that of natural...
Toshio Shibuya, Ryosuke Endo, Yuki Kitamura, Yoshiaki Kitaya, Nobuaki Hayashi
HortScience   45(4) 553-558   Apr 2010
To evaluate the effect of fluorescent lamps with a high red:far-red (R:FR) light on the potential photosynthesis of transplants, we investigated the photosynthetic light responses of cucumber (Cucumis sativus L.) seedlings grown under fluorescent ...
Toshio Shibuya, Akihito Sugimoto, Yoshiaki Kitaya, Makoto Kiyota, Yuichiro Nagasaka, Shinya Kawaguchi
HortScience   45 460-462   Mar 2010
We estimated leaf vapor conductance (gl) of cucumber grafted transplants under greenhouse growing conditions. Fifty-six transplants were placed on a bench in the greenhouse. The transpiration rate (Tr) of the canopy was estimated by weighing the 1...
M. T. Naznin, Y. Kitaya, T. Shibuya, H. Hirai
Journal of Horticultural Science and Biotechnology   85(2) 161-165   Jan 2010
A hydroponie culture system was developed for producing garlic bulbs and roots containing a precursor of ajoene. Gariic plants were cultured in a growth chamber under artificial lighting for 2 months at air temperatures of 25°/21°C (light/dark), r...
Toshio Shibuya
Journal of the Japanese Society for Horticultural Science   79(1) 64-68   Jan 2010
Cuttings of cucumber (Cucumis sativus L.) grafted onto squash (Cucurbita moschata Duch.) rootstock using a hole-insertion graft were warmed at the hypocotyl of the rootstock in a cold chamber for acclimatization: they were soaked in water held at ...
T. Shibuya, N. Rirai, Y. Sakamoto, J. Komuro
Journal of Economic Entomology   102(6) 2265-2267   Dec 2009
We investigated the effects of morphological characteristics of cucumber, Cucumis sativus L., seedlings grown at different vapor pressure deficits (VPDs) on initial colonization of whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) bioty...
Toshio Shibuya, Akihito Sugimoto, Yoshiaki Kitaya, Makoto Kiyota
HortScience   44(6) 1796-1799   Oct 2009
To evaluate the effects of plant density on gas exchanges under water stress resulting from high vapor-pressure deficit (VPD), we measured net photosynthetic rate (Pn), transpiration rate, and leaf conductance (gl) of cucumber (Cucumis sativus L.)...
Toshio Shibuya, Toshio Shibuya, Haruka Nakashima, Haruka Nakashima, Kaori Shimizu-Maruo, Kaori Shimizu-Maruo, Tomoko Kawara, Tomoko Kawara
European Journal of Horticultural Science   73(5) 196-200   Oct 2008
In storage of grafted cuttings, development of graft union at beginning of storage is important, because the scions are easy to be exposed to water stress during storage when the vascular tissues are not connected. Warming treatments were carried ...
Toshio Shibuya, Haruka Nakashima, Kaori Shimizu-Maruo, Tomoko Kawara
Journal of the Japanese Society for Horticultural Science   76(3) 217-223   Jul 2007
We investigated the effects of supplying warmed water to the graft union of tomato and eggplant grafted cuttings during low-air-temperature storage on graft development and plant growth after storage. The scions of grafted cuttings were held at an...
Toshio Shibuya, Ayako Tokuda, Ryoko Terakura, Kaori Shimizu-Maruo, Hidemi Sugiwaki, Yoshiaki Kitaya, Makoto Kiyota
Journal of the Japanese Society for Horticultural Science   76(2) 139-143   Apr 2007
We investigated the effects of bottom-heat treatment (BHT) during low-air-temperature storage on the rooting and growth of squash cuttings after planting following storage. Rooting of cuttings was much improved with BHT temperatures ranging from 2...
Toshio Shibuya, Johshin Tsuruyama, Yoshiaki Kitaya, Makoto Kiyota
Scientia Horticulturae   109(3) 218-222   Jul 2006
A forced ventilation system that directs airflow upward or downward within a canopy was developed for plant culture in order to enhance photosynthesis and growth of the plant canopy. Tomato seedling canopies including the seedlings, growing medium...
Toshio Shibuya, Ryoko Terakura, Yoshiaki Kitaya, Makoto Kiyota
HortScience   41(2) 410-413   Apr 2006
Application of a low-relative-humidity treatment (LHT) to seedlings can reduce water stress on cuttings harvested from the seedlings, after the cuttings are planted. Effects of illumination during LHT and LHT duration on leaf water potential and l...
Yoshiaki Kitaya, Yoshiaki Kitaya, Masayuki Kawai, Hideyuki Takahashi, Akira Tani, Eiji Goto, Takahiro Saito, Toshio Shibuya, Makoto Kiyota
Annals of the New York Academy of Sciences   1077 244-255   Jan 2006
Fundamental studies were conducted to develop a facility having an adequate air circulation system for growing healthy plants over a long term under microgravity conditions in space. To clarify the effects of gravity on heat and gas exchanges betw...
X. Wei, Y. Kitaya, T. Shibuya, M. Kiyota
Phyton - Annales Rei Botanicae   45 295-298   Oct 2005
The growth rate of bamboo plants is considered to be greater than other tree species and thus it will be promising plants for afforestation. Bamboo plants have the role as a CO2 absorber, if the bamboo forests can be well managed. In order to unde...
Y. Kitaya, T. Shibuya, M. Yoshida, M. Kiyota
Advances in Space Research   34(7) 1466-1469   Jan 2004
To obtain basic data for adequate air circulation for promoting plant growth in closed plant production modules in bioregenerative life support systems in space, effects of air velocities ranging from 0.1 to 0.8 m s -1 on photosynthesis in tomato ...
Y. Kitaya, J. Tsuruyama, T. Shibuya, M. Yoshida, M. Kiyota
Advances in Space Research   31 177-182   Jan 2003
To obtain basic data on adequate air circulation to enhance plant growth in a closed plant culture system in a controlled ecological life support system (CELSS), an investigation was made of the effects of the air current speed ranging from 0.01 t...
渋谷俊夫・川口真也・清家 孝・清田 信
Environ. Control in Biol.   41(3) 301-306   2003
Environ. Control in Biol.   41(1) 37-41   2003
Y. Kitaya, T. Shibuya, T. Kozai, C. Kubota
Life support & biosphere science : international journal of earth space   5 199-203   Jan 1998
In order to characterize environmental variables inside a plant canopy under artificial lighting in the CELSS, we investigated the effects of light intensity and air velocity on air temperature, water vapor pressure, and CO2 concentration inside a...


M. T. Naznin, M. T. Naznin, Y. Kitaya, T. Shibuya, H. Hirai, R. Endo, M. Lefsrud
Acta Horticulturae   1098 95-102   Sep 2015
The integration of hydroponics with aquaculture is known as Aquaponic, is gaining increased attention as a bio-integrated food production system. The research presented highlights our ability to link hydroponic garlic culture with tilapia fish pro...
Toshio SHIBUYA, Yoshiaki KITAYA, Toyoki KOZAI
Environ. Control in Biol.   35(3) 227-234   1997
Toshio SHIBUYA, Yoshiaki KITAYA, Toyoki KOZAI
Environ. Control in Biol.   35(3) 235-239   1997

Research Grants & Projects

Environment Control in Biology
0130 (Japanese Only)