Hell's Paradise: Jigokuraku, Vol. 1

Even an invincible ninja may not be able to survive Hell's Paradise! Gabimaru is a ninja on death row with one chance to see his wife again-by finding the elixir of immortality on a supernatural island and delivering it to the shogun. Standing in his way are his fellow convicts and the fearsome beasts that roam the island, devouring or killing anyone they encounter. Gabimaru the Hollow is one of the most vicious assassins ever to come out of the ninja village of Iwagakure. He's ruthlessly efficient, but a betrayal results in him being handed a death sentence. He has only one hope-in order to earn his freedom, he must travel to a long-hidden island and recover an elixir that will make the shogun immortal.