Where to buy iron? (Sekiro: Shadows Die Twice)

The trader in locating the Stairs of death, after completing his first quest.

GrYnT101
From the merchant near the stairs of death (where the giant was killed in the stocks). But after do his bidding (overheard two men on the bridge in the location of old grave, which is talking about salt). In General, at this point, the iron will drop out of most of the enemies, so buy it is not a special need.

Iron falls from almost all the mobs in batches, it is possible to farm in the Tank Asino.

iron is easy to farm, closer to the end of the game it will almost all fall as black powder