Cochlea

The Ghoul Detention Center (喰種収容所) or Kokuria (コクリア) is a prison located in the 23rd ward owned by CCG. Captured ghouls gets detained there, after the decision to keep them alive either for information, quinque materials or any other exceptional need from them.

Structure
Not much is known yet, but it seems like a long building that is wide open at the top, which makes it possible to see the sky inside. While the path is only at the surroundings near ghouls' jails, the center is a deep fall.

The building is divided to many deep floors:
 * First Floor (lower rating ghouls)
 * Second Floor (S rating ghouls)
 * Third Floor (SS rating ghouls)
 * Fourth Floor is the deepest floor and imprisonment for SSS rating ghouls.

Prisoners

 * Donato Porpora (SS rating)
 * Matasaka Kamishiro (SS rating, escaped)
 * Naki (S rating, escaped)
 * Yakumo Oomori (S rating, escaped)