Hell's Paradise: Jigokuraku, Vol. 4

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.
The beings collectively known as Lord Tensen are beyond comprehension. These rulers of the mysterious island are deathless, ferocious and nearly invincible. Can Gabimaru the Hollow and his Yamada Asaemon executioner Sagiri survive long enough to reach their goal, despite being forced to contend with immortal monsters?