Kono Dio Da is one of the most quoted lines from JoJo's Bizarre Adventure, spoken by the series villain Dio Brando when he reveals himself and takes credit for a scheme. The phrase, which roughly means it was me, Dio, became a shorthand for a dramatic villain reveal in anime fandom and spread through reaction videos, edits and memes long after its original scene. Fans still use it because Dio's delivery is instantly recognisable and turns any twist into a theatrical moment, even for viewers who have never watched the series.