How Old Is Usopp in Jojo Bizarre Adventure

It's an intriguing question that many anime and manga fans might find themselves asking: "How old is Usopp in JoJo's Bizarre Adventure?" And while it's a testament to the incredible popularity and distinctiveness of both One Piece's long-nosed sharpshooter and Hirohiko Araki's iconic series, the simple answer is that Usopp, the beloved character from the Straw Hat Pirates, does not actually appear in JoJo's Bizarre Adventure. He hails from a completely different, albeit equally beloved, fictional universe....