It was amazing, we did a short trip to the park, and we have not expectations about architecture that day. My architectrual guide was empy for that part of Tokyo, Adachi-ku,
Then at the real beginning of the park we saw this huge building.
It is the Tokyo budokan, wich means the place for martial arts, including kyuudo (Arc)-
here the link to wikipedia
and here the link to the architect, Rokkaku Kijyo (六角 鬼丈)
I took some picture inside and a short video in the middle hallway. The building was finished in 1990, thus the project should be born at least 2 years before, or most likely inthe middle of the eighties.
also I steal some frames from a kendo training I suppose