Where does “祓魔術” come from?

祓魔術 (Japanese) comes from Japanese 術, from Middle Chinese 術.

祓魔術 (Japanese): exorcism

Definitions

Step	Language	Word	Meaning
1	Japanese	術	technique; art; way, means
2	Middle Chinese	術	—

祓魔術 — Etymology, Origin & Word History | Etymology Explorer