JoJo's Bizarre Adventure is a manga series created by Araki Hirohiko. In 2007, a movie based on the first arc (Phantom Blood) of the manga was produced by Studio APPP (with Hideki Futamura directing), and released in Japan theatrically. The movie was never distributed in another media, because APPP couldn't find a publisher to distribute the movie.
The only visual evidence of the film available today is a leaked clip containing a rough cut of the first 16 minutes (with the film's official soundtrack unofficially dubbed over - no voice audio), and two trailers that showed up online before the movie's release in Japanese theaters.
TheCartoonCatastrophe's video on the subject.: https://www.youtube.com/watch?v=d3frRC0dri0
LSuperSonicQ’s video on the subject.: https://www.youtube.com/watch?v=Rh0r2WfjWaA