- Obtain the Masamune or complete the appropriate Walk of Echoes Weapon Skill Trials and obtain the Torigashiranotachi.
- Equip the Masamune or Torigashiranotachi and go to the Walk of Echoes. Talk to the ??? glowing on the floor to the far north with the weapon equipped.
- Need VW clears of three starter cities and completion of Guardian of the Void.
- Kupofried appears and offers you a choice of which weapon skill quest to complete. Select Great Katana, then trade your weapon to the glowing ??? to unlock the Tachi: Fudo weapon skill and complete that weapon skill quest.