Kay B.
Google
Beautiful gallery. Smaller than I expected. The exhibits were nice, though, it didn't take long to see and take in all the work. Art work is on the 2nd and 3rd floors.
Location is kind of tucked away. I used Google maps and that help a lot. Getting off at roppongi station, turn left once you exit, turn left again at shake shack, walk along side of shake shack and you'll see cinnabon ahead. Turn left again and you'll see a small sign on your right for the gallery.