A wide range of sushi-dishes is served from a set of little boats that goes round a circuit. Eaters sit around the circuit and take their favourites off the boats. The most common dishes rotate permanently and get a regular refill, but some more special (and more delicious) ones can be ordered straight from the cooks. This is fun!
Besides the boat action, you can also have a regular meal at a regular table, but having never tried it, I can't say anything