Diamond is Unbreakable

"There are other people in this town who have the same kind of power as I do, what a surprise!"

- Anjuro Katagiri, Chapter 269

Diamond is Unbreakable (ダイヤモンドは砕けない) is the fourth part of JoJo's Bizarre Adventure, serialized in Weekly Shōnen Jump from May 1992 to December 1995. The arc spans 174 chapters and is preceded by Stardust Crusaders.

Summary
In 1999, an older Jotaro Kujo travels to coastal Morioh, Japan, in order to meet high school freshman Josuke Higashikata who is the illegitimate child of Joseph Joestar.

Meanwhile, the Arrow, manifesting latent Stand abilities, travels throughout Morioh; as Josuke and his friends seek out the culprits of a series of homicides.

Publication
On July 6, 2018, VIZ Media announced that it would print the manga in English. Publication has begun on May 7, 2019.

Animation

 * An official anime adaptation was announced on October 24, 2015, with David Production returning to produce and direct. The first episode aired on April 1, 2016, and the 39th and final episode aired on December 23, 2016.

Movie

 * A live-action movie produced by Warner Bros. and directed by Takashi Miike was announced on September 28, 2016. It was released in theaters on July 2, 2017.

Trivia

 * This part is notable for taking place in a fictional setting, without traveling to any real locations.
 * Leaving the Tarot and Egyptian mythology in Part 3, Part 4 primarily references popular (rock) music in its names.
 * Araki states that it is possible that JoJo's Bizarre Adventure could have ended with Part 3 since the resurrection of DIO was the last plot element of precedent.
 * The title of this arc was formerly translated as Diamond Is Not Crash.
 * This part is notable for having one of the most drastic changes in art style as it progressed. At its inception, it took on the muscular, inspired look that was present in the previous three parts. Around the middle of the part, the various characters took on a more youthful appearance, particularly in the case of Josuke and Koichi. By the end of Diamond is Unbreakable, the manga adopted the glamorous art style in which characters go from very muscular to athletic that would define the visual presentation of Vento Aureo and Stone Ocean.