Yōkai?

All right I've been doing some research and I've found this great man named Shigeru Mizuki. A Japanese author and cartoonist. He was born in 1924 and lost his left arm in WWII. From what I've read he is largely responsible for keeping the yokai tradition alive in japan.
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.

^{Once again Wikipedia !!!!!!!!!!!}

All these creatures including the 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.