Part 4: Diamond is Unbreakable



Part 4 of JoJo's Bizarre Adventure, subtitled Diamond is Unbreakable, is preceded by Stardust Crusaders and followed by Golden Wind. Josuke Higashikata is JoJo of this part and Yoshikage Kira is the main antagonist. Morioh Stand Users serve as the villainous faction.

This is the second part to incorporate Stands after Part 3, and introduces the Stand Arrow, which becomes more important in the following two parts.

Originally titled Diamond is not Crash, the manga first released in Weekly Shonen Jump from 1992 to 1995.

Diamond is Unbreakable was adapted into a TV anime as the third season of JoJo's Bizarre Adventure: The Animation in 2016.

In July of 2017 a film adaptation titled Diamond is Unbreakable Chapter 1 was released. It adapts the first few arcs of Part 4 and ends with a cliffhanger, omitting several characters and plot points.

The Part 4 manga was officially released in the United States from 2019 to 2021.

Official Description
In 1999 in the town of Morioh, Josuke Higashikata and his friends uncover the mysteries of their small town, fighting fellow Stand Users like themselves, and eventually taking down their town's local killer, Yoshikage Kira.

Plot Summary
The fourth part is set in 1999 in the fictional city of Morioh Japan, and follows Joseph Joestar's illegitimate son, Josuke Higashikata. The story revolves around the mysteries of the small town that Josuke and his friends inhabit, as well as discovering the truth about the Stand Arrow and how it tempts the people of Morioh. Josuke and his friends also track down the illusive murderer, and Stand User, Yoshikage Kira. The story ends at Yoshikage Kira's defeat, and the golden heart of Morioh being preserved.

Characters

 * -|English =
 * Josuke Higashikata - Billy Kametz
 * Okuyasu Niijmora - Jalan K. Cassell
 * Koichi Hirose - Zach Aguilar
 * Rohan Kishibe - Vic Mignogna
 * Jotaro Kujo - Mathew Mercer
 * Yoshikage Kira - D.C. Douglass
 * -|Japanese =
 * Josuke Higashikata - Yuki Ono
 * Okuyasu Niijmora - Wataru Takagi
 * Koichi Hirose - Yuki Kaji
 * Rohan Kishibe - Takahiro Sakurai
 * Jotaro Kujo - Daisuko Ono
 * Yoshikage Kira - Toshiyuki Morikawa

Thus Spoke Kishibe Rohan
Main Article: Thus Spoke Kishibe Rohan

Thus Spoke Kishibe Rohan is a canon spin-off series to JoJo's Bizarre Adventure that takes place in Morioh, the setting of Diamond is Unbreakable. It is an anthology series featuring Rohan Kishibe as the protagonist/ narrator throughout every chapter. The stories deal with other supernatural abilities besides Stands, including the likes of ghosts, avatars of Greek Gods, and Yokai.

JoJo's Bizarre Adventure: Crazy Diamond's Demonic Heartbreak
Main Article: Crazy Diamond's Demonic Heartbreak

Crazy Diamond's Demonic Heartbreak is an official spin-off from the JoJo's Bizarre Adventure series, the first not to be written by Hirohiko Araki. It is written by Kohei Kodono, the writer behind Purple Haze Feedback, and illustrated by Tasuka Karasuma, who is the artist behind the manga series No Guns Life.



The Book: JoJo's Bizarre Adventure 4th Another Day
A non-canon light novel written by Otsuichi in 2007 set one year after the events of Part 4. The novel follows four different perspectives, ranging from Koichi Hirose's perspective, the perspective of Takuma Hasumi the main antagonist of the book, Akari, Takuma's mother, and Chiho Futaba who is Takuma's best friend/sister. The book features two original Stands created by Otsuichi, The Book and Memory of a Jet. It is non-canon but it does not conflict with the existing timeline so it very well could be canon.

Dead Man's Questions
A canon sequel to Part 4 written by Hirohiko Araki showing what happens to Yoshikage Kira after his death. He becomes a ghost that lost his memories as he tries to find his true purpose in the ghost world.

Diamond is Unbreakable Drama CD Collection
From 2016 to 2017, two sets of CD drama collections were released in collaboration with JoJo's Bizarre Adventure: The Animation Season 3: Diamond is Unbreakable. The two sets tell two original stories set in the town of Morioh during the plot of Part 4, and all of the voice actors from the Part 4 anime return to reprise their roles.

The first of the two sets tells the story of Josuke, Koichi, and Okuyasu investigating a ghost story in their high school, which ends up merely being Toshikazu Hazamada playing a prank on them with his Stand, Surface. The second set is about Koichi and Josuke trying to help Okuyasu build up the nerve to ask out a waitress that he thinks is cute at Café Deux Magots.

Trivia

 * This part has the most supplementary material to its name than any other, with a film adaptation, several one-shot spin-offs, a light novel, a CD drama, and a prequel manga.
 * Part 4 is the longest out of the parts released in Weekly Shonen Jump, with 174 chapters and 18 volumes. Despite this, it shares the same amount of episodes with Golden Wind, and is 9 episodes shorter than Stardust Crusaders even though it outnumbers the both of them by about 20 or so chapters.
 * The third opening song featured in this part, "Great Days," sounds very similar to the protagonist Josuke's catch phrase in Japanese (gureto daze.)
 * While he goes unnamed in the original manga, Keichi and Okuyasu's father is known as Mansaku Nijimura.

Continuity

 * The main protagonist of this part, Josuke Higashikata, is revealed to be the bastard son of Joseph Joestar who had an affair with Josuke's mother a few years before the events of Part 3. As a result of this, Josuke was alive for all of the events of Part 3.
 * It is revealed in a flashback that Josuke was afflicted with the same illness as Holly, Jotaro's mother, during the events of Part 3. This was his stand, Crazy Diamond, manifesting in him, but since he was a baby, he was not able to control it and fell ill.
 * In that flashback, Josuke is saved by a third-year student who wears his hair in a pompadour, which is what inspired his current hairstyle. It is incorrectly theorized that Josuke's savior is actually himself travelling back in time as a result of Killer Queen's third type bomb, Bites the Dust. This theory was deconfirmed by Araki long ago during the original serialization of Part 4.
 * The Stand Arrow is properly introduced this part after being alluded to in the anime adaptation of Part 3. It is explained that this is how DIO awakened his Stand, and we know this because Joseph uses Hermit Purple to uncover an image of Enya holding the Stand Arrows.
 * The Stand Arrow is added into the background of a scene in the Stardust Crusaders anime so that this explanation makes more sense.
 * We are shown three different Stand Arrows existing in this world in this part and the one before. The one that belonged to the Nijimura brothers, the one that belonged to Yoshiro Kira, and the one that was in the hands of Enya the Hag.


 * It is revealed that those of DIO's minions who still had a flesh bud inside them when he died were mutated into vampire hybrid monsters. One of the victims of this happened to be Okuyasu and Keicho's father.
 * It is also revealed through Keicho's description of DIO that DIO was using the Stand Arrow to "search for a specific kind of Stand." This is foreshadowing DIO's "heaven plan" that is outlined and achieved during the events of Part 6.
 * Josuke's Joestar birthmark is not originally seen in the original manga for one reason or another, but is added in a couple scenes in the anime adaptation.
 * Jotaro Kujo and Joseph Joestar return in this part after both last appearing in the previous one. Jotaro is now a major ally to the main cast and provides support to them with help from the Speedwagon Foundation, who also reappear.
 * Jotaro's daughter, Jolyne, has canonically been born by this point in time, but no mention of her is made during the canon events of this story.
 * Joseph appears as a decrepit old man, his mind no longer as sharp as it used to be. In this part he adopts an invisible Stand wielding baby named Shizuka.
 * These two are the only characters from previous parts that return physically.
 * It is incorrectly theorized that Killer Queen's third type bomb, Bites the Dust, is actually a Requiem Stand. This cannot be the case due to the fact that it resulted from a completely different phenomenon. In Bites the Dust's case, Kira himself was stabbed with the Arrow for a second time, while Requiem Stands require the Stand itself to be pierced.