moving-in soba; soba given to new neighbors
A custom where someone who has just moved gives soba noodles to their new neighbors as a greeting. The phrase comes from おそばに参りました (I have come to be near you), a pun on そば (soba noodles) and そば (near).
See also: そば
I took some moving-in soba and went to greet the house next door.
The custom of giving moving-in soba has been declining lately.