The headquarters of the Quincy. It is disguised as a normal looking base but deep underground , there is another base for the Quincy. Only Quincy or people those are invited are allowed to go in.
It seems to be a small city with an average population that resembles the real world. Humans that live in Karakura Town are unaware of the ghosts and spiritual forces that live there.Karakura Town is referred to as District 3600 by the Shinigami and is situated on the current jūreichi (重霊地, Important Spirit Ground) - the point in the Human World that possesses the greatest concentration of spiritual beings