Premium Kaio is a conveyor-belt sushi restaurant on the sixth floor of DiverCity Tokyo Plaza in Aomi, Koto City, Tokyo. Orders are placed on a tablet at the table, and the menu can be read through food pictures and Korean and English labels. When a red button flashes, a model train has arrived beside the table with the ordered sushi, and diners take the food themselves. The tableware, tables and chairs are generally not clean.