The other day when we were at Toguchi beach there were several Japanese families using the pavilions for birthday parties. Nothing too unusual about that, but the unusual thing was the way they did their pinata.
What is the pinata? It's a watermelon in a neton the ground in the middle of a field! The person up to bat has a blind fold and stick, just like our pinatas, but they have to find the melon by following directions called out from other party goers. When they get close, they try to whack open the melon with the stick.
As Stevie said, no wonder the Japanese are so thin - you get watermelon instead of candy at a birthday party!