Diamond Is Unbreakable

The arc was adapted into an anime television series by David Production, JoJo's Bizarre Adventure: Diamond Is Unbreakable, that began in April 2016.

[5] A live-action film adaptation by Toho and Warner Bros. titled JoJo's Bizarre Adventure: Diamond Is Unbreakable Chapter I was released on August 4, 2017.

[6] In 1999, Jotaro Kujo arrives to the town of Morioh (杜王町, Moriō-chō) in the M-Prefecture (M県, Emu-ken) after learning that his grandfather Joseph Joestar has an illegitimate son while compiling a list of beneficiaries.

Fighting Josuke after inadvertently insulting his pompadour, Jotaro explains the nature of Stands and that one is used by a death row inmate named Anjuro "Angelo" Katagiri escaped to Morioh.

But Angelo uses his final moments of consciousness to reveal someone hit him with an Arrow that gave him his Stand, Jotaro learning that an actual artifact was possessed by Dio's forces.

But his prompted murder of Shigechi ends up exposing him during a brief battle with Jotaro and Koichi that left him injured as Josuke and Okuyasu arrive.

After Rohan died in one loop and Josuke's group the next, Hayato realizes he needs to force Kira into canceling Bites the Dust before the others are killed with their deaths made permanent.

Hayato exploits the knowledge he gained from the time loop to wake Josuke up early and arrange for him to overhear Kira blowing his cover.

Diamond Is Unbreakable is set in the fictional town of Morioh located in S-City, M-Prefecture, which is modeled after a specific area in Hirohiko Araki's hometown of Sendai, Miyagi Prefecture.

[8] Although he originally intended for JoJo's Bizarre Adventure to be a "mythical" manga with superpowers and such, he enjoyed drawing the "feeling of everyday life" in Diamond Is Unbreakable.

[9] Although he usually does not respond to reader opinions, he had heard similar comments from the editorial team and so made an exception by stating that "the weaknesses inside the hearts of people" are a thematic element of Part 4.

When designing his characters' outfits, Araki considers both everyday fashion and "cartoonish, bizarre clothing that would be impractical in real life."

"[11] Because he is the "friend next door" instead of being similar to a hero in a Greek myth like the protagonists of the previous parts, Araki cited Josuke Higashikata as his favorite character in Diamond Is Unbreakable.

[8] He cited Shigekiyo Yangu's Harvest as his favorite Stand from Part 4, because, although he finds his "flaws and trashiness adorable," the character picks up stuff off of the ground which is "pretty scary.

[5] Toho and Warner Bros. partnered to produce a live-action film based on the fourth arc of JoJo's Bizarre Adventure that was released on August 4, 2017.

Both studios planned for worldwide distribution and, with a title of JoJo's Bizarre Adventure: Diamond Is Unbreakable Chapter I, hoped to create sequels.

The Cheap Trick story arc was adapted into the episode From Behind of the Thus Spoke Rohan Kishibe TV series released on December 28, 2021.

Morioh was based on Araki's hometown of Sendai.