The prison houses murderers and missing-nin who have broken the law. Known inmates of this facility are Mizuki, Fūjin and Raijin. Mizuki manipulated the two brothers to help him break out, leading to a huge riot where all the prisoners escaped after taking the guards as hostages. However, all the prisoners were recaptured shortly (Fūjin and Raijin were duped into returning by Tsunade).