Doujun's Questline & Jinzaemon's Fate

Doujun is a researcher found in the Abandoned Dungeon, near the Bottomless Hole Idol. He asks you to find a 'sturdy man' for his experiments. You have two potential victims: Jinzaemon (found near the Ashina Reservoir Idol after Genichiro) or Kotaro. If you send Jinzaemon to Doujun, he will eventually be experimented on and die, but you get a Prayer Bead. If you send Kotaro, he will also be experimented on. Doujun's quest is morally ambiguous and often leads to tragic ends for the NPCs involved. Completing it yields a Prayer Bead and some lore.