Hell's Paradise: Jigokuraku, Vol. 1: Volume 1

Even an invincible ninja may not be able to survive Hells Paradise! Gabimaru the Hollow is one of the most vicious assassins ever to come out of the ninja village of Iwagakure. Hes ruthlessly efficient, but a betrayal results in him being handed a death sentence. He has only one hopein order to earn his freedom, he must travel to a long-hidden island and recover an elixir that will make the shogun immortal. Failure is not an option. On this island, heaven and hell are just a hairs breadth away.