Shigeharu Shimamura, a plant physiologist and CEO of Mirai, has constructed 25,000 square feet of futuristic garden beds nurtured by 17,500 LED lights in a bacteria-free, pesticide-free environment; the farm produces 10,000 heads of lettuce a day. This makes it the largest indoor farm in the world, at least according to the World Record Academy.
Whether or not it's actually the largest indoor farm in the world is debatable, but it's sure impressive. Built in a location devastated by the 2011 Tōhoku earthquake and tsunami, the 25,000 square foot factory farm is more than just a proof of concept.
Shimamura and his Mirai Co. are planning to build similarly large and less-wasteful produce factories in Russia and Hong Kong.