The first 3 DVDs of the 2000 JoJo's Bizarre Adventure OVA offered an explanation for those unfamiliar with the story in the previous series, starting with Joseph coming to Japan to explain Jotaro's strange behavior (volume 12 of the manga).
Thanks to "Anime-4ever" for the anime
Keywords: JoJos Bizarre Adventure, Battle Tendency, Phantom Blood, Part 1, Part 2, Timeline
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Within the JoJo's Bizarre Adventure franchise, there are two Original video animation (OVA...