Hell's Paradise ( Jigokuraku)

"Hell's Paradise" (Jigokuraku) is a manga series written and illustrated by Yuji Kaku. Set in feudal Japan, the story follows Gabimaru, a death row ninja, who is offered a chance at redemption if he can find the elixir of immortality on a mysterious island. Accompanied by other criminals with their own agendas, Gabimaru must confront formidable foes and supernatural creatures in his desperate quest for eternal life.