I took these pictures at a kaiten (conveyor belt) sushi restaurant I used to enjoy sushi so often. The name of the restaurant is Misaki-ko (海鮮三崎港 北千住東武) and is located in the precinct of Tobo Kitasenju station east of Tokyo.

 
Generally at these restaurants sushi is made by a chef in front of you. If you don't find your favorite one on the conveyor you can order it.
 

Empty trays in right corner are ones I've finished (the second picture). The color of each tray shows each price. I pay according to them.

I don't recommend kaiten sushi that's ordered by computer and made almost by machine, but I recommend one served by chef in front of you.