Diamond Is Unbreakable is the fourth story arc of the Japanese manga series JoJo's Bizarre Adventure, written and illustrated by Hirohiko Araki. It was serialized in Shueisha's Weekly Shōnen Jump for a little more than 3+1⁄2 years, from May 4, 1992, to December 4, 1995, with the 174 chapters collected into eighteen tankōbon volumes. In its original publication, it was titled JoJo's Bizarre Adventure Part 4: Jōsuke Higashikata . It was preceded by Stardust Crusaders and followed by Golden Wind.

JoJo's Bizarre Adventure is a Japanese manga series written and illustrated by Hirohiko Araki. It was originally serialized in Shueisha's shōnen manga magazine Weekly Shōnen 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 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 134 tankōbon volumes as of April 2024.