In a lot of ways, Japan’s equivalent to the hamburger is the beef bowl, or “gyudon” as the locals call it. Tasty, fortifying, and cheap, beef bowls are so prevalent and popular in Japan that they essentially have their own strata in the personal food pyramids of many college students and bachelors.
Realizing that much of its customers’ bodies are literally made out of beef bowls, Japan’s largest gyudon chain is now embarking on a research project to investigate what happens after three months of eating the dish.

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