Can you spot the similarities?
One Piece belongs to Eiichiro Oda
Fairy Tail belongs to Hiro Mashima
Edit: I know One Piece came before Fairy Tail and I know One Piece is the mold where Fairy Tail came from. I'm just pointing out the possibility of the writers of both mangas sharing some notes. So stop whining about "One Piece came before Fairy Tail"!