Where does “ソファ” come from?

ソファ (Japanese) comes from English sofa, from French sofa — couch; sofa.

ソファ (Japanese): a sofa

Definitions

Step	Language	Word	Meaning
1	English	sofa	A raised area of a building's floor, usually...
2	French	sofa	couch; sofa

ソファ — Etymology, Origin & Word History | Etymology Explorer