These two dishes are often thought to be one and the same. Sashimi consists of thin slices of raw fish or other seafood served with spicy Japanese horseradish (wasabi) and shoyu while sushi consists of the same, served on vinegared rice, but also includes cooked seafood, vegetables and egg. Another form of sushi is norimaki, or sushi roll, in which the filling is rolled in rice with a covering of nori. Sushi can be breathtakingly expensive, in exclusive, invitation-only restaurants where you eat whatever the chef selects for you. But it can also be cheap and cheerful fast food. Cheap sushi is available at supermarkets or at kaiten-zushi restaurants, where customers sit at a counter and choose what they want from an ever-changing conveyor belt. These are usually highly automated and ensure that no dish goes around more than a couple of times.