Japanese architecture, the Water Spaceship bird's-eye view

I wrote before about the Water Spaceship, the spectacular roof of the Oasis 21 building from Nagoya. It is actually a huge, lens-shaped jar filled with water, opened in the center and with a promenade alley on the sidelines. Besides the exceptional design, the roof manages to keep some coolness even in torrid days...

Here it is photographed from 100 meters above, from the observatory of the Nagoya TV Tower.