Deadman Wonderland (デッドマンワンダーランド?) is a manga serial written by Jinsei Kataoka and illustrated by Kazuma Kondou, who also wrote and illustrated the Eureka Seven manga, and published in Shōnen Ace since 2007.
An anime adaptation of the series has been announced.
Ganta Igarashi has been convicted of a crime that he hasn't committed, and sent to a new, privately owned and operated prison, where the inmates are the main attraction in a modern day twist to the gladiatorial coliseums of ancient times. Throw in a healthy dose of weird little girl, some new-found super powers, and a little conspiracy theory, and you have Deadman Wonderland.