In the japanese movie 13 Assassins, the movie ends with everyone dead except for two people: Shinzaemon's nephew and the hunter that the samurai found in the woods. However, we were very explicitly shown the hunter taking a sword through the throat and being slashed in the belly just minutes earlier. While he addresses the belly wound by noting that he's been given worse by bears, he does not address his other wound. In fact, that wound seems to have mysteriously vanished.
What happened to the hunter's seemingly fatal wound, and how did he survive it?