Since there are almost no Japanese who are fat, how do you explain sumo wrestlers?

Question:

Answer:

Sumo wrestlers actually eat a very, very specialized diet, usually developed by the sumo stable head who is usually a former sumo himself. Eating this diet and sleeping several times a day in between training helps them bulk up quickly, and when they're ready to retire, because their diets are so healthy, they can drop the weight really quickly and look completely normal.

Also, I've seen legitimately fat people in Japan. They're not rampant, but they exist, so don't think they don't!