Kansō Sadan notes that difficult passes in Ise teem with strange fires, especially on rainy nights, moving back and forth like hand lanterns. If one meets it and immediately lies down and curls up, the fire passes overhead and the person avoids sickness. Shoshū Saiyakuki Shōroku echoes this: in Ise there is a ghostly light called the “Fire of the Akuro-gami”; meeting it brings epidemic-like disease, so one should avoid it by prostrating. Sources differ on exact locations, and a direct tie to Igusafuchi is not firmly established.