In Portland we often visit our local kaiten sushi
Marinepolis Sushiville.
My understanding of kaiten sushi is if you pick up the plate from the belt you are then responsible for purchasing it. Sean and I have often purchased a plate just to find out what is exactly on that little blue plate.
Kaiten sushi in Japan was serious. Very serious. I was too scared to ask for something more simple.
When it comes to kaiten sushi I think I'll stick to the american version.