Gazu Hyakki Yagyō
In the collection of "yōkai" depictions, the "Gazu Hyakki Yagyō" by Sekien Toriyama, they were depicted under the title "鼬", but this was read not as ""itachi" but rather "ten", and "ten"" are weasels that have reached several years of age and became" yōkai" that have acquired supernatural powers. In the depiction, several martens have gathered together above a ladder and created a column of fire, and one fear about them was that if martens that have gathered together in this form appear next to a house, the house would catch on fire.