The Blinding Ritual is a ritual performed before the Demon Tag Ritual in the Himuro Mansion. They used the Blinding Mask to create the Blinded Maiden or the 'oni' (demon). They used the blood of the maiden's eyes to weaken the spirits of the Hell Gate. The maiden or the demon's duty is to choose in the Demon Tag Ritual the next Rope Shrine Maiden and Blinded Maiden to perform their respective rituals 10 years later.