(Edit:Accepted)
These training grounds weren't exactly the ones you'd see in the squads grounds. The walls and ceiling of this underground training area are made of the same material as the walls of Sereitei, Sekkiseki. This is justified by the level of the people training here, as well as how exclusive these training grounds are.
(WIP)
Neutral Territory
A public forum to beat the crap out of each other.
