I buy a brand that's sold in the produce dept. of many supermarket chains.
It's called Makoto Ginger Dressing. It's in a clear glass
bottle, with a black label, white writing.
They also make a honey ginger and ginger slaw dressing, but they don't taste the same.
The black label one tastes like the restaurant flavor you speak of.
I also use it to season chicken wings for the grill.