Haven't seen this one before, Motoazabu Hills Forest Tower.
We went to a new neighbourhood today, Azabu-juban, which is a lot of fun to say. (It's Golden Week in Japan, hence the various outings.) Our main goals were a burrito place, which aren't that common in Japan, and a temple that is known for having several cats on the grounds.
It also turns out that Azabu-juban is full of embassies and very expensive real estate.