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Osaka Prefecture University, 


The Osaka Prefecture University (OPU) is one of the largest public universities in Japan. OPU actively develops collaborative research projects between academia and industry and contributes the results of its research to society. In 2014, the OPU began an innovative indoor farming project called the R&D Center for the Plant Factory, funded in part by the Japanese Ministry of Agriculture, Forestry, and Fisheries.


Philips GreenPower LED production modules

open up the possibility of lettuce cultivation under artificial lights in closed-type plant growing facilities.”

- Prof. Masakazu Anpo, Fellow (Advisor to President) and Director R&D Center


The challenge


In a vertical farm, crops are grown in climate-control led rooms under artificial light, giving growers a great deal of control over growing conditions. Their crops use significantly less water and are not affected by unpredictable weather. The challenge is making the business case – managing the costs so the crops can be sold for a profit.


The right lighting


Philips plant specialists and application engineers helped the Center select the right light recipes for cultivating lettuce without daylight. The research labs include two clean room labs, several multi-environent labs, and other cultivation environment simulation rooms.


Production yields have been increased by 30% through the use of localized air and temperature control. By operating at night when energy is less expensive in Japan, the Center has reduced its energy costs by over 30%. Professor Anpo says, “Since the farm is like a cleanroom, once the lettuces have been harvested they can be eaten without having to be washed first which is an added benefit for consumers.”


Thanks to the Philips GreenPower LED production module, we have been able to cultivate lettuce favorably. The photosynthesis of lettuce has been sped up by exposing the lettuce to the optimal wavelength of light,” says Junichi Yamaguchi, Engineer, General Manager & Sales General Manger, GCN.

Philips greenpower LED interlighting on

Philips GreenPower LED production module


The production module is developed for multilayer cultivation in conditioned environments with little or no daylight.


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LED lamps produce a lot lesse heat

The Team

GreenClocks New-generation (GCN) Corporation at Osaka Prefecture University



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