History Manga / JoJosBizarreAdventureDiamondIsUnbreakable

* GoFastOrGoBoom: Josuke has to keep himself moving above 60 km/h in order to outrun Highway Star, a Stand that can keep running at that exact speed indefinitely and drain its targets of their nutrients.

** The anime has a very interesting case: when Josuke is seen playing a videogame, it's both a recognizable game and a real console (specifically ''[[VideoGame/{{Gradius}} Gradius IV]]'' and a UsefulNotes/Nintendo64). Thing is, while a N64 port of ''Gradius IV'' was indeed scheduled for release in 1999, the year the show takes place, it was ultimately cancelled. You decide whether it's an oversight or a nod to a piece of videogame history trivia. Another scene averts this by instead having Josuke play ''[[CallBack Oh! That's a Baseball]] '99''. In the manga, Josuke is playing on a [[UsefulNotes/SuperNintendoEntertainmentSystem Super Famicom]] instead, as the Nintendo 64 did not exist yet when the manga was being written.

An anime adaptation, once again handled by Creator/DavidProduction aired from April to December 2016, spanning 39 episodes. An {{OVA}} of episode 5 of its spin-off, ''Thus Spoke Rohan Kishibe,'' is a bonus for those who buy the entire DVD set for Part 4. A live action film directed by Creator/TakashiMiike and starring Creator/KentoYamazaki was released in 2017 to coincide with the franchise's [[MilestoneCelebration 30th Anniversary]]. The English dub of the anime adaptation aired on Creator/{{Toonami}} on August 18, 2018.

! Spoilers for all parts of ''Manga/JojosBizarreAdventure'' preceding this one, particularly ''[[Manga/JojosBizarreAdventureStardustCrusaders Stardust Crusaders]]'' are unmarked. Administrivia/YouHaveBeenWarned!

! All spoilers for ''Manga/JojosBizarreAdventureStardustCrusaders'' are unmarked. Administrivia/YouHaveBeenWarned!

** Yukako's Stand allowing her to use her hair as a weapon is very similar to Bruford using his hair to wield his sword in ''Phantom Blood''.
*** This should show just how skilled Bruford was. Yukako was a Stand user and her hair was her Stand; Bruford had so much control over his body that he could naturally control his hair.

** The third opening of the anime adds in a sign that says "VA 2001". 2001 is the year '''V'''ento '''A'''ureo takes place in.
*** The localized version instead has "GW 2001". GW now stands for '''G'''olden '''W'''ind, as it is called that in this version.

* GenreShift: Though still first and foremost an Action-Horror Manga, ''Diamond is Unbreakable'' marks the first chapter in the ''JJBA'' Saga to '''not''' have Vampires as its primary narrative drive and focus, and eventually depart from the Vampire-Genre ''completely'' by the time [[spoiler:the universe reboots in Part 7]]. As a whole however, Part 4 is notable for its smaller scale focus on a Japanese town instead of a grand adventure, and draws inspiration from both murder mysteries and slice of life comedies where wacky neighbors are Stand users as well, genres that fit well in the suburban scene.
** Invoked by Aya during the ''Cinderella'' arc, who more or less gets Yukako and some other customers to go through a fairytale-like story to find true love, with the typical punishments and rewards that are found in them. Essentially, the chapters and Episode 20 are therefore a fairy tale story as told by ''[=JoJo=]'' characters.

* IncrediblyLamePun: The anime's first opening theme, "Crazy Noisy Bizarre Town," contains the line "Dakedo kyo mo ''jojo'' ni monku nanka iiatte nichijō o odoru Crazy Noisy Bizarre Town!"

* RevealingCoverup: [[spoiler: When Shigechi accidentally picks up the bag that contains Kira's latest "girlfriend", Kira is determined to get it back, and ends up having to kill Shigechi when he sees the contents... but because he overconfidently confronts Shigechi directly, and underestimates his toughness (he actually survives Killer Queen's first bomb), the boy manages to escape and deliver a DyingClue to the heroes, which spurs them on to find him. Had Kira just kept the hand hidden at home instead of carrying it around in public, or destroyed Shigechi covertly like he usually does, nobody would have been the wiser.]]
** Similarly, Cheap Trick coercing Rohan to destroy the photos where [[spoiler: a disguised Kira is seen as Kosaku Kawajiri tips him off that Kira is indeed among the crowd people, which leads to the gang discovering Hayato and ultimately leading to Kira's defeat]].

* ShootTheHostage: More like Punch The Hostage, but same idea. A criminal makes the mistake of insulting Josuke's hairstyle. He thinks he's safe with a hostage, but Josuke just punches through both. Of course, the hostage is still safe and sound thanks to Josuke's healing abilities.
** And again when Aqua Necklace manages to get inside Tomoko's body. Josuke responds by making Crazy Diamond pick up a glass bottle, punch through Tomoko's stomach, crush the bottle, then pull its arm back out while healing both, which traps Aqua Necklace in the repaired bottle and Tomoko doesn't even realize anything happened.

* IfYouKillHimYouWillBeJustLikeHim: Angelo invokes this against Josuke and Jotaro, suggesting that, even though he's an escaped death row inmate and [[spoiler: successfully murdered Josuke's grandpa]], killing him would make them no better. [[TooDumbToLive Predictably]], it fails miserably at saving his ass, especially since Josuke [[FateWorseThanDeath never had the intention of killing him in the first place]].

[[caption-width-right:350:[[CharacterCatchphrase This is great!]][[note]]From left to right: Yukako, Tomoko, Ryohei, Rohan, Jotaro, Koichi, Josuke, and Okuyasu.[[/note]]]]