No, Enma is not a real sword in the sense of existing outside of the "One Piece" fictional universe. Enma is a fictional sword created by Eiichiro Oda, the author and illustrator of the "One Piece" manga and anime series. It is a significant and prominent sword within the story, specifically in the Wano Country arc.

While Enma does not exist as a real historical or tangible sword, it is a fictional creation that holds importance within the narrative of "One Piece." It possesses unique characteristics and abilities that contribute to the development of the story and the abilities of the characters within the series.