Akutsu Masato's interpretation of a pizza plate, with an extra flat edge. This is done on a Japanese scale, so think 8-9" pizzas rather than 17" monstrosities...
Also well-suited for anything you might want a medium-sized round platter for. Cheese and crackers, maybe a place to hold either your raw vegetables or meats for table-top sumibi-yaki, maybe even a nice sushi tray.