Chameleon Jail (カメレオンジェイル) is a manga series by Takehiko Inoue. It was serialized in Shounen Jump (Weekly).
"Risk Hunters" are a special breed of professionals, willing to take on the jobs that even experienced detectives, law enforcement officers, negotiators or agents are incapable of handling. Among them, one man stands out as the strongest, as well as the strangest, risk hunter. His name is Chameleon Jail.