I am looking at a sumo wrestling match inside a large indoor arena. The prominent Japanese flag hanging from the ceiling is a clear indicator of the country. The distinct architecture of the ring, known as the *dohyo*, with its suspended roof, is iconic to professional sumo. This is almost certainly the Ryōgoku Kokugikan in Tokyo, the primary venue for sumo tournaments. I am very sure of this location.

Country: Japan
City: Tokyo
Confidence: 95%

then: guess