How many parts does JoJo's Bizarre Adventure have?
Nine. JoJo's Bizarre Adventure is divided into nine main story arcs, each with its own protagonist, setting, and genre, all of them Joestars whose names shorten to JoJo. The series began in Weekly Shonen Jump on January 1, 1987, moved to the monthly Ultra Jump in 2005, and had reached 139 collected volumes by March 2026, with Part 9 still running.
THE NINE PARTS
One family, nine fresh startsTWO CONTINUITIES, NOT ONE
Where the line is drawnThe first six parts form a single continuity: one generational conflict that starts with Jonathan and Dio and runs down their bloodlines for over a century. Parts 7 to 9 form a second continuity, where the Joestar family tree is heavily altered and the names return as counterparts rather than descendants. Steel Ball Run is not Part 1's past; it is a parallel 1890 with its own Joestar line, and JoJolion and The JoJoLands continue from it.
Every protagonist carries the family's marks: descent from the Joestar line, the star-shaped birthmark above the left shoulder blade, and a name that abbreviates to JoJo, from Jonathan and Joseph through Giorno (GioGio in Japanese pronunciation) to Jodio, whose name fuses Jo and Dio outright.
IT WAS PLANNED AS THREE
The structure underneathAraki originally planned the series as a trilogy, ending in a final confrontation in present-day Japan. The plan outgrew itself: each part instead closes its own story and hands the name down, which is why the series can be entered at almost any part, and why collectors meet nine different volume 1s. Why the handover became the design is its own question, answered on the protagonist page linked below.