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 Part 4: Josuke Higashikata, 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

Other Stands

 * The Book (4th Another Day)
 * Memory of a Jet (4th Another Day)
 * Nijimura Father's Stand

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.

Thus Spoke Kishibe Rohan (one-shots)
Starting in 2013, Hirohiko Araki began writing several one-shot chapters telling mini side stories from the perspective of Part 4 character Rohan Kishibe. They are canon to the JoJo timeline, as they are written entirely by Araki and fit into the plot.

Chapters for this series go as follows:


 * Episode 16: At a Confessional
 * Episode 2: Mutsu-kabe Hill
 * Episode 5: Millionaire Village
 * Episode 6: Poaching Seashore
 * Kishibe Rohan Meets Gucci
 * Episode 4: The Harvest Moon
 * Episode 7: A Rainy Monday
 * Episode 8: Deoxyribonucleic Acid
 * Episode 9: The Run

The chapters are listed as "episodes" and release out of order. Because the highest numerical value for the chapters goes up to 16, it is implied that there may be at the very least 8 more chapters to be released that take place before At a Confessional. The only one of these chapters that is not confirmed to be canon to the JoJo timeline is Kishibe Rohan Meets Gucci.

Rohan at the Louvre
Another addition to the Rohan saga, this is a non-canon story that acts as promotion for Araki's artwork being shown at the Louvre in Paris. It tells the story of Rohan visiting this art museum and discovering some dark secrets about some of the contents in this facility. It is confirmed to be non-canon because it conflicts with the information already provided to us in the official JoJo lore.

Thus Spoke Rohan Kishibe (OVA)
Starting in 2016 a couple of the one-shot chapters for TSKR began being adapted into an OVA by David Productions. The first episode released was Millionaire Village, in 2017, and in 2018 Mutsu-Kabe Hill was animated.

Two years later in 2020, The Run and At a Confessional were released. As of now only four out of the nine TSKR chapters have been adapted.

Thus Spoke Kishibe Rohan: Short Story Collection
A light-novel of a group of short stories written in the style of the Thus Spoke Rohan Kishibe series by Ballad Kitaguni. They are first released in monthly Ultra Jump in smaller volumes with 2-3 chapters in them, and later on in 2018 the three original volumes were compiled into two bigger ones with an additional chapter only for the book release added. The stories released within the first two volumes were Kushagara, Blackstar, Blood-Stained Bookmark, Censored Equation, Okami-Sama, Box of Happiness, Yuyaganidai, Symmetry Room, and Gleanings of Paradise.

In September 2021 it was announced that the fourth volume of stories would be published in monthly Ultra Jump in the following month with two brand new Thus Spoke Kishibe Rohan: Short Story Collection chapters. The two new chapters released in 2021 were Golden Melody and Original Author Kishibe Rohan.

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.

JoJo's Bizarre Adventure: Diamond is Unbreakable (Film)
A direct live-action film adaptation of Part 4 based on the first half of the arc. It ends at the confrontation with Keicho in the Nijimura Household, with minor differences in the lot. Instead of Keicho being killed by Red Hot Chili Peppers, he is killed by Sheer Heart Attack and the Stand Arrow is stolen from him.

Thus Spoke Kishibe Rohan (Live-Action Drama)
Another live-action adaptation, this time of three Thus Spoke Rohan Kishibe stories: Kushagara (novel only,) Millionaire Village, and D.N.A.

The first three episodes were released in December 2020, and after one year in December 2021 three more episodes are set to release. The episodes in Season 2 are as follows, The Run, From Behind (adapting the Cheap Trick arc from JJBA,) and Mutsu-kabe Hill.

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.

JoJo's Bizarre Adventure: Crazy Diamond's Demonic Heartbreak
An official spin-off from the JoJo's series, the first not to be written by 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 No Life. It has yet to release, but it is described as the story of Josuke Higashikata and his Stand before it was known as Crazy Diamond. On the cover it features Hol Horse and something resembling Pet Shop, but as of now it is unknown what it will entail.

Trivia

 * In this part the Stand Arrows are introduced. 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.
 * 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 (guereto daze.)