The Akarana Corridor is a strange tunnel binding times and realities, and can be used to traverse time and into different timelines. Several spirits gather in the Corridor, either as Time Tourists, passing spirits out to see the past directly, or Lost Souls, who have lost themselves in the immensity of Akarana and have no way of returning to their point of origin. Several souls remark that the year Raidou comes from, Taisho 20, never actually came to pass, as a reference to real-world history and how it interacts with Raidou's timeline.