Toyoki Kozai

Professor Kozai obtained a BS degree in Horticultural Sciences from Chiba University, and Master and Doctoral degrees in Agricultural En gineering from the University of Tokyo. When he started his academic career in 1973 as an agricultural engineer, his work was focused on greenhouse environment control engineering. After establishing his early work on greenhouse light environments, energy saving, ventilation and computer control, his scientific interest extended to in vitro environment control in plant tissue culture, sugar-free media and photoautotrophic micro-propagation, and plant production in closed systems with artificial lighting. His first paper on plant production using LED was published in the early 1990’s.