Whetstone is an Usable Item in Nioh.
"A tool for sharpening bades. It raises the familiarity of any equipped weapon by 150"
- Raises familiarity of equipped weapons by 150.
Location/Where to Find
- Possible drop by Nurikabe Demon (illusory wall)
- Sometimes sold by Senji Tome.
- The Smithing Text is a hidden reward for completion of Yokai Country on WotSam ONLY. It does not drop on higher difficulties. There will be no in-game message notifying the player. However, upon entering the Blacksmith after completing the mission - the Whetstone will be available. It requires Red Kappa Shell x1 to forge.