ungaikyou
A mirror youkai that first appeared in Toriyama Sekien's Hyakki Tsurezure Bukuro.
The caption of the illustration suggests that this was a fictional being created by him from the legend of zhaoyaojing / shouma-kyou, a monster-revealing mirror.
The shouma-kyou is said to reflect the images of many mysterious beings, but when I thought its shadow was reflected, it began to move, and I thought in my dream, this must be a mirror monster.
The characters based on / named after Ungaikyou
* Ungaikyou (Binbougami ga!)
* Ungaikyou (Gegege no Kitarou)
* Ungaikyou (Ushio to Tora)
* Ungaikyou (Youkai Watch)
* Ungaikyou (Yuuki Yuuna wa Yuusha de Aru)
See also
* Wikipedia article (JP)