A ghoul detention center is a holding facility for captured ghouls, suspected ghouls, and people tied to them. These sites fall under the authority of the Commission of Counter Ghoul, and two of them are known to operate in Tokyo.
A ghoul detention center serves as a prison built to confine ghouls, individuals suspected of being ghouls, and anyone otherwise connected to them. Every such facility is run by the Commission of Counter Ghoul, which oversees the capture and containment of these prisoners.
These centers exist to keep dangerous ghouls locked away from the public and under the agency's control, holding detainees for questioning and further handling. Within Tokyo, two are documented.

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A ghoul detention center is a holding facility for captured ghouls, suspected ghouls, and people connected to them. Every such facility is run by the Commission of Counter Ghoul.
Two ghoul detention centers are documented in Tokyo within Tokyo Ghoul, both operated by the Commission of Counter Ghoul.
Cochlea is Tokyo's foremost ghoul detention center, sited in the 23rd ward. It holds captured ghouls under the Commission of Counter Ghoul's authority.
Corniculum is a smaller ghoul detention center located in the 12th ward, also operated by the Commission of Counter Ghoul.
A ghoul detention center can hold not only captured ghouls but also individuals suspected of being ghouls and people otherwise connected to them.
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