"In February, the agency opened Pasona O2, an indoor urban farm where vegetables, rice, flowers and herbs flourish under fluorescent lights and LEDs in an environment that is almost entirely chemical-free. In a basement that was once a bank-vault, plants are cultivated and nourished hydroponically – using nutrient-enhanced water instead of natural soil. Temperature, humidity, and carbon dioxide levels are all controlled by computers. This kind of tank-farming makes it possible to grow plants rapidly, all year round, by maintaining an optimal balance of nutrients."

Associated links:
http://www.pasona.co.jp/pasona_o2/about/
http://www.japantimes.co.jp/cgi-bin/makeprfy.pl5?fl20050522x2.htm
http://www.cityfarmer.org/newpages.html