Hirohiko Araki is a Mangaka known for creating
Jojo’s Bizarre Adventure, there also exist a promenent claim that he has achieved everlasting youth.
This mainly comes from the observation that he seems to
age backwards combined with the fact that he writes about
immortal vampires and martial arts that slows your aging.
Person 1: Hey, you ever notice how Hirohiko Araki seems to
just get younger and younger every year?
Person 2: Yeah, they say he discovered the
fountain of youth in some old
Aztec ruins.