Why the Japanese aren't obese

It's Sunday morning, and where are a group of North Americans in Japan going to go if not Denny's for breakfast? With visions of giant stacks of pancakes, French toast and egg/sausage meals dancing in our heads, we enter the restaurant.

We were met with this tiny portion of mango pancakes:

With no butter or syrup, and the middle part of the pancake cut out, it wasn't quite the pancake experience that we are used to. But, when we left in the end, we really didn't feel hungry.

Do you think the Japanese are disappointed when they go to a Denny's in America and don't find miso soup on the breakfast menu?