If you order a Whopper set meal, you can order as many extra Whoppers as you can eat within a 30-minute period
The Whopper is Burger King’s symbol all over the world.
Burger King ran this campaign last year as well, and said it was a success, even though it might be likened to a speed-eating contest in the hands of some gluttonous customers.
http://www.japantoday.com/category/food/view/burger-king-to-offer-all-you-can-eat-whopper-campaign-for-two-weeks -via Ace of Spades HQ | Photo: Flickr user shinya