Hell's Paradise: Jigokuraku, Vol. 8 by Yuji Kaku

[Viz] 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 survivors stage a desperate raid on Horai, the center of Lord Tensen’s operations, even as the new landing party closes in. Battling these supernatural beings is a life-and-death proposition, requiring total focus and extreme skill. A moment’s distraction could be fatal. Will Gabimaru and Sagiri overcome the odds and survive this gauntlet?