Upvote:3
"Witchcraft" had very different connotations in Europe than in China or Japan.
In (medieval) Europe, being a witch was connected to worshipping Satan. As such, it was a religious "sin," not merely a secular crime. That's why it was so widely and severely prosecuted.
Asian cultures don't have a concept of "Satan," so there was no conflation of "witches" with "devil worshippers." But "witchcraft" did have its usual connotation of "supernatural powers," so even "superhuman" ability could qualify as witchcraft. Even so, this seemed to be considered an isolated phenomenon (e.g. the Chinese king was jealous of the ability of his general). That explains the absence of "witch hunts" as opposed to one-off "witch trials."