Deadman Wonderland

Deadman Wonderland is Japan's only privately operated prison, built after the Great Tokyo Earthquake on ground zero. Deadman Wonderland was founded by Rinichirō Hagire and run by Tsunenaga Tamaki. It gathers prisoners from all over Japan and raises money for the revival of the destroyed metropolis. To the public and the tourists that visit daily, Deadman Wonderland is a massive theme park-like facility run by the prison population. Unbeknownst to the general population, most of the prison's attractions involve cruel games of survival where many inmates lose their lives or are maimed for the entertainment of an oblivious public. The prison's guard staff is also granted autonomy over how to punish the prisoners, which often results in bloodshed.

Each prisoner is fitted with a collar that functions as a life monitor, locator and stunner. The prisoners on death row receive poison injections through the collar and must consume a special antidote candy every three days. Their collars contain countdown timers that warn the wearer with blinking and beeping when time is running low. When the timer reaches zero, the collar displays the word "DEAD" and kills the inmate. Afterwards, the word "UNLOCK" enables the collar to be removed. The collars can also be removed by card keys used by the prison guards.

While the threat of violence is constant at the prison, most prisoners enjoy a great deal of liberty inside Deadman Wonderland. Utilizing Cast Points, the prison's unique form of currency, prisoners can purchase a wide variety of items from ordinary lunches, to luxurious furniture for their rooms, and even years off of their sentences (though Cast Points can't be used to the freedom of a "deadman"). Those on death row also use Cast Points to purchase their life-saving candies.

Despite its identity as a prison and theme park, Deadman Wonderland houses a much darker secret. Hidden away from the eyes of tourists and the general prison population is a massive underground facility known as "G Block". This is where the prison keeps their Deadmen secluded and where the Carnival Corpse arena is located. G Block also houses numerous laboratories and rooms where experiments on humans are performed and where scientists are attempting to harness the powers of the Deadmen for monetary and political gain.