One Piece has established plenty of narrative threads and mysteries throughout its decades-long run. One of the most notable aspects of Eiichiro Oda’s writing is the mangaka’s ability to gradually work things into the series, organically introducing lore and plot elements that steadily unfold as it goes on. Fans are still eagerly waiting for some of the earliest mysteries Oda introduced to unfold, and though some have resolved themselves, others are progressing far more slowly.