Nippon Sports Science University (Nittaidai) is the home gym of World Champion Kohei Uchimura.
Sho Nakamuri posted his impressions:
… I was amazed when I saw the training facility. It was probably the biggest gym that I’ve ever been in, and there were multiple equipments for every event! There were also an army of guys on the collegiate team (I think at least 50 on the men’s side) so it was a very different but fun environment to be in …
I spent a week at Nittaidai in the early 1990s. It was the home gym of one of my first coaches, Shiro Tanaka.
Of my many memories the one that stands out foremost is watching the Sumo athletes training gymnastics. Spectacular!
Gymnastics Coaching.com 