I liked the semplicity and elegance of this public building.
here is the official link of their site. There is a large park behind and aside of the building which is called Tokyo Rinkai Disaster Prevention Park. We were there during the day of the Tokyo Marathon 2015 since the end line was near, in Odaiba.
from a post that opens a pdf, a University seemes related to that building.
The architectural company is well known around the world since it is the bigger in Japan. The building has also a green roof quite amusing.