The Jawbone Ravine (顎骨峡谷) is the second available area found in Akaneiro: Demon Hunters. Like other locations, the Jawbone Ravine has three missions (along with three bosses). The area is full of jagged ravines which slice through areas of rock, trees and terrain leading to many unexplored caves which lead to an underground lake. The Ravine is bursting with many enemies which must be faced.