JoJo's Bizarre Adventure is a Japanese manga series written and illustrated by Hirohiko Araki. It was originally serialized in Shueisha's shonen manga magazine Weekly Shonen Jump from 1987 to 2004, and was transferred to the monthly seinen manga magazine Ultra Jump in 2005. The series is divided into a total of nine main story arcs, each following a new protagonist bearing the 'JoJo nickname. JoJo's Bizarre Adventure is the largest ongoing manga series published by Shueisha by number of volumes, with its chapters collected in 136 tankobon volumes as of December 2024.