Despite that massive use of concrete walls. This project was odd but elegant, like a modern castle. There is also a voice dedicated to the Architect on wikipedia. Here is the official firm website, called now amorphe. It is plenty of interesting designs.
Here the exact link on Aoyama Dori I guess. It is worth mentioning that I am following an University class about Tokyo`s development History after Worl War II. Thanks to that class I learnt that Aoyama Dori was a very commercial neighbourhood for wealthy people. Ten it became after the 64 just a street connecting Shibuya (at that time a new trendy area) with ghe evergreen Ginza.
And some more shots. And a video can be seen on youtube here.