The venue for the contest was something else. It was located in the neighborhood of Akihabara, center of anime/otaku culture, on a corner on one of the main avenues of Tokyo, Chuo Dori.
The black glass building is where it took place:
On the first floor it was open to the street on two sides, with a little stage on the front, the vendors behind, an area for learning to yo-yo (at one time I did show tops ot kids), and a large stage on the back:
The basement floor was for practice and an area was separated Saturday for tops. There we did the prelims.
The main stage was on the second floor: