I'm less convinced - sushi outside of a restaurant context, from the similarity in presentation style and selection in the DC area at least, seems to be outsourced to daily deliveries from regional suppliers
Hmm, I wasn't aware of that, I thought they usually just had the butcher or somebody throw it together in house. That was just a guess though.
well it's sold in the butcher/fresh fish section of the store, so I'm pretty sure it's prepared on site using whatever is used to supply their normal tuna. at least I hope.