Here we see the Roof Garden, on Level 7 of the Main and South Buildings. This pastoral plaza features a waterfall, koi pond, herb garden, fruit trees and sculptures.
Photo from http://blog.q-taro.com / Roy Tseng

The concept of a Japanese retail-oriented Roof Garden is not a new one. The first was built, on the top of Tokyo's Mitsukashi department store, in 1907. Such urban green spaces are now mandated by the government for all major developments; this as a countermeasure to the urban heat island phenomenon.
Photo from http://www.iea.org / International Energy Action