Golden Kamuy.
It's the story of a man called Sugimoto the Immortal, a soldier during the Japanese Russian war of 1904. He's not really immortal and doesn't have any powers (not that kind of story), but he's survived many a "impossible" conflict cause of his Frank Castle level of brutality and damage soak. See his face up there? He has a level of scars that put Vash the Stampede to shame.
Anyway, he was in love with this girl and his homeboy took her after the war started. Then his homeboy died on the battlefield. Sugimoto returned home only to find out not only had his ex gone blind, but she couldn't recognize him cause his reeked of murderous intent and blood. Him being a simp, he decides to find money to pay for this sight restoring operation.
After numerous dead ends, he trips across the story of a legendary criminal who stole some 600 million yen in gold and stashed it before being caught. Despite being SEVERELY tortured, he never talked. Instead, he had portions of a map to the treasure tattooed on 27 inmates bodies, on the promise that once they were free they'll link up and split the treasure.
Sugimoto decides to track these guys down, kill them, skin their bodies for the map and find the treasure himself.
What follows next is high level fukkery, plot twists, blood and gore, and uh.. tutorials on how to survive and cook in the wild. Cause he's not the only one looking for those maps, and really... who wants to be killed and skinned?