Apparently, the 24th World Congress of Architecture was being held in Tokyo and for this convention, they decided to put some exhibits for the public to see.
What caught my eye, other than the large "Genki FOR JAPAN" banner" was the Archi-neering Design Exhibit. It was a showcase of unique works in archi-neering (a new concept combining architecture and engineering design) featuring scaled models of real buildings.
The main exhibits were put on display in the "Marucube", the spectacular atrium inside the unspectacular dull looking Marunouchi Building.