 Also, in the writing "Kōshinden" (庚申伝) from the Genroku years, there is the passage "shōkera is an insect, and said in one theory to be the Three Corpses" (ショウキラハ虫ノコト也、一説三尸ノコトト云), so there is also the interpretation that shōkera refers to the Three Corpses, and it is also said that they are the personification of the three corpses or that their depiction was modeled after the Three Corpse's middle corpse, which took on the form of a beast.The Gazu Hyakki Yagyō by Toriyama Sekien depicts a shōkera looking in through the skylight of a house's roof.Yōkai-related literature starting in Shōwa and Heisei began to give the interpretation that this is surveillance to see whether people are following the rules of Kōshin-Machi day, and it is supposed that the shōkera would give a punishment by three fingers with sharp nails on those who break the rule.