Where does “落下傘” come from?

落下傘 (Japanese) comes from Japanese 傘, from Middle Chinese 傘.

落下傘 (Japanese): Synonym of パラシュート

Definitions

Step	Language	Word	Meaning
1	Japanese	傘	umbrella; bell; umbrella
2	Middle Chinese	傘	—

落下傘 — Etymology, Origin & Word History | Etymology Explorer