http://www.straitstimes.com/News/Home/Story/STIStory_276120.html
"The sushi chef or food server simply stands inside the frame created by the belt to replenish the food items. 'The largest belt we've done has a perimeter of 26 metres - nine metres by four metres...That was when we catered for Senior Minister Lee Kuan Yew's birthday party four years ago."
http://www.asiaone.com/apexpal/news/20040209_001.html