The Gōkei area (豪渓, Gōkei) is a river valley formed by the Makidani River (a tributary of the Takahashi River) which stretched from the extreme northern part of Sōja to Kibichūō (formerly Kayō) in Okayama Prefecture, Japan. The area is only about 600m long, but the area is filled with strange granite rock formations resulting from wind and rain erosion.