Actually, I don't like Japa Dog. They just boil the sausage, and add sauce. The sausage itself is tasteless. I rather eat the smokie dog on Robson and Burrard.
I can't think of many choices under $6 (inc tax) in Richmond..
May be IKEA hot dog if you want to compare? They are cheap
Otherwise, $5.5 rice in Parker Place...