“Good, Fun, and Cheap”
It is the revolving sushi (it is called Kantenzushi in Japanese) and it is good. The quality is pretty good and the price is really good. All the sushi is 100 yen, and after eating 5 dishes, you have a chance to win a small toy.
The wait can be really long so i would either make the reservation from the website before going or just plan to wait. There is a machine that will give your number. The number it self means nothing. It is not an order, just a label.
They also do takeout. You can either get one of the planned ones or pick the ones you want. If you are eating at the restaurant and still want to take some home, you can have them prepare it while your eating. That way you can pay and pick it up when you finish eating. It can take some time to be prepared.