Question: sekiro how to get to sunken valley?
Answer: Sunken Valley (落ち谷, Fallen Valley) is a Location in Sekiro: Shadows Die Twice. Sunken Valley is reached by exiting the back of Ashina Castle, across the bridge by the moat. You'll need the Gun Fort Shrine Key from Kuro, the Divine Heir, after defeating Genichiro Ashina and speaking to Lord Isshin.