Elliot W.
Google
This place is amazing! It says that it's a museum of sculpture but the real wonder of this place is the home. A large, sprawling traditional style Japanese home with wonderful wood and furniture. The central enclosed garden and pond area is amazing. It was raining the day we were there so we didn't have a chance to go up to the roof garden. But I'm sure there are great views of the surrounding area.
If you are in the Tokyo area be sure to add this to your itinerary! It's the best museum/house I've ever visited.