
"I can no longer come to the restaurant every day ... but even at 100, I try to work if possible. I believe the best medicine is to work," says Japanese sushi legend Jiro Ono.

"But why should I stop? My bar is so much more than work for me. It's my life," says Nonna Anna, who loves to work at her cafe.

Japanese people are more likely to reach 100 years old than anyone else in the world, a fact that some researchers attribute to their diet. So, are they right - and is eating tofu and ...