The colorful panels that look like books above the entrance of a shopping mall in Nagoya, Japan, are components in an electricity generator developed by Inaba Electric Work.

The structure called “Surface of the wall windmill ecological curtain” is made of 775 vertical windmills and is expected to produce 7,551 kilowatt-hours annually. Combined with solar panels set on the top of the structure, the energy collected will be used to power lighting in the mall building.

Via MDN News.