anime

Youkai are anthropophagous by nature, so they might generally need a bit of actual flesh/death in their diet.

That proportion can probably be reduced or even eliminated as they redefine their mythological identity from old-fashioned maneaters drawing fear from their prey, to instead drawing power from the people who are terrified of vegans.

In fact... as humans may transition into Youkai through desire or prowess, and the richest sources of superstitious fear to consume in the modern world comes from reactionaries in general, I posit that Hexbears are a kind of Youkai! Posting is danmaku and emotes are spellcards! This is further evidenced by our frilly hats, heavy drinking, and occasional cannibal murders.