What are YOKAI?
Yōkai (妖怪, literally demon, spirit, or monster) are a class of preternatural creatures in Japanese folklore ranging from the evil oni (ogre) to the mischievous kitsune (fox) or snow woman Yuki-onna. Some possess part animal and part human features (e.g. Kappa and Tengu). Yōkai generally have a sort of spiritual or supernatural power. Yōkai that have the ability to shape-shift are called obake.
Japanese folklorists and historians use yōkai as "supernatural or unaccountable phenomena to their informants". In the Edo period, many artists, such as Toriyama Sekien, created a lot of yōkai inspired by folklore or their own ideas, and in the present, not a few yōkai created by them (e.g. Kameosa and Amikiri) are wrongly considered as being of legendary origin.yurei and obakemono are grouped together.
So dose this mean I have to change the name of the game? Don't know I have to do more research.