He's adorable:

"I'd love to race Bolt," the wispy-haired Miyazaki told AFP in an interview after tottering over the line with a joyful whoop at a recent Japan Masters Athletics competition in Kyoto.

"I'm keeping the dream alive. I try to stay in top shape and stay disciplined and healthy. That's important for everyone, even Usain Bolt."

Born in 1910 -- the year Japan annexed Korea and when the Titanic was still under construction -- the pint-sized Miyazaki offered some dietary tips to Bolt, whose world record is 9.58 seconds.

"My body is small so I take care of what I eat," said Miyazaki, who stands just 1.53 metres (five feet) tall and weighs in at 42 kilograms (92 pounds).

"When I eat, I chew each mouthful 30 times before swallowing," he added, loosening his Usain Bolt running shoes. "That makes my tummy happy and helps my running. And I eat my tangerine jam every day."

In a country with one of the world's highest life expectancies, Miyazaki is the poster boy for Japan's turbo-charged geriatrics.