There's a stereotype that only American food is jumbo-sized. That stereotype is wrong.
Japan also has its own super-sized helpings -- known as "ohmori" (大盛り) or "large serving." Recently on 2ch, Japan's largest web forum, images of "mega ohmori" meals were uploaded. Here's a look at those, along with some other huge meals restaurants offer. Some of these dishes are called "mega" (メガ) or even "jumbo" (ジャンボ or "janbo") in Japanese.