Few people may realize there is a giant solar power plant in the heart of the Tokyo metropolis, where available open land is scarce.

But in Kawasaki, Tokyo Electric Power Co.'s 11-hectare Ukishima plant, with its 37,926 solar panels, is proving the exception.

The rent-free plant sits atop a landfill adjacent to Tokyo's Haneda airport and the Tama River estuary, thus the site is not near any sun-blocking high-rises.