Where does “suojavilja” come from?

suojavilja (Finnish) comes from Finnish suoja, from Proto-Finnic sooja, from Russian со́я, from Dutch soja, from Japanese そい, from Japanese 醤油, from Middle Chinese 醬油, from Middle Chinese 醬 — bean paste.

suojavilja (Finnish): a grain or crop sown to protect grass, etc. from droughts, weeds, etc

Definitions

a grain or crop sown to protect grass, etc. from droughts, weeds, etc

Ancestry of “suojavilja”, step by step

suojavilja traces back through two separate lines of ancestry.

via Finnish suoja

Step	Language	Word	Meaning
1	Finnish	suoja	shelter; protective covering; refuge
2	Proto-Finnic	sooja	shelter; protection; warm
3	Russian	со́я	jay {{i\|dialectal}}
4	Dutch	soja	soy
5	Japanese	そい	醤油 soy sauce
6	Japanese	醤油	soy sauce
7	Middle Chinese	醬油	—
8	Middle Chinese	醬	bean paste

via Finnish Vilja

Step	Language	Word	Meaning
1	Finnish	Vilja	grain, cereal, corn type of grass cultivated for its edible grains
2	Proto-Finnic	vilja	grain, cereal; abundance, plenty

Every word from Middle Chinese 醬 →Every word from Middle Chinese 醬油 →Every word from Japanese 醤油 →