Looking nice. I won't comment on the correctness of the food, since i know little about sushi other than the ocasional picture in the media, other than saying it's very nicely represented, halfway between realistic and cartoony, and inviting/yummy. I love representations of food, so this goes right to my soft spot.
I have a pick about the plates though. Since the food looks represented from an obvious 3/4 up/side view, the plates should also be in such a perspective, but they look as being seen straight from above. It could be a style/design choice, but if it's not, i'd try to convey some foreshortening by increasing the vertical size of the upper border of the plate, and reducing and adding highlights on the lower border.