Colosseum (コロシアム) is the 11th block of the 7th Hierarchical City of Kazamotsu.
At the Colosseum, the seating and monitors rise up at the start of a match. The monitors show the audience the action up close, and from a gameplay perspective, they can also show information relating to the players during fights, such as player rank and comments. If you look closely, you can see Azteca among the audience.
- BlazBlue: Chrono Phantasma Material Collection, Worldview, Page 152