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Trivia / JoJo's Bizarre Adventure: Diamond is Unbreakable

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  • Approval of God:
    • Darren Hayes of Savage Garden thanked David Production for including the song "I Want You" as the ending theme for the anime.
    • Wataru Hatano gave congratulations to Yuki Ono for taking over his role as Josuke for the anime.
  • Big Name Fan: Geoff Thew of the YouTube channel Mother's Basement and former writer for Hardcore Gamer was always a huge fan of JoJo's Bizarre Adventure. However Diamond is Unbreakable is the part that he advocates for the most.
  • Creator's Favorite:
    • Diamond Is Unbreakable is Hirohiko Araki's favorite part with Josuke being his favorite protagonist and Kira as his favorite antagonist. Both characters ranked #1 and #2 respectively in his Top 10 favorite characters in JOJO A-GO!GO!.
    • Wataru Hatano who voiced Josuke in All-Star Battle admits that Josuke is his favorite character.
  • Creator's Favorite Episode: Billy Kametz, the voice of Josuke in the dub, says that his favorite episode was "Let's Go Eat Some Italian Food".
  • Defictionalization:
    • Kira Yoshikage's necktie with the Sheer Heart Attack prints on them are available from the Bandai Premium store.
    • The real-world Japanese convenience store chain, Lawson, temporarily changed one of their locations' name to Owson and sold JoJo merchandise in late 2018 to promote the Part 4 anime. It's worth noting that Lawson is the visual inspiration for the in-universe Owson brand.
  • Dueling Works:
    • With Yu Yu Hakusho which ran in Shonen Jump around the same time and featured a similar location, themes, and characters.
    • When the anime aired it was one with Re:Zero not because the two works are similar in any way but rather both were among the most popular anime airing in Japan at the time, and in the United States the two most talked about anime of the Spring and Summer seasons.
  • Fan Nickname: The heroes for this part (mostly Josuke, Koichi, Okuyasu, and Rohan) are frequently referred to as the "Duwang Gang", alluding to the infamous Duwang scans.
  • Fan Translation:
    • The manga has a rather infamous one in the form of the Duwang Scans which were the result of an attempt at an English project. Thankfully several new fan translations have been made available which helps since some territories have not seen a localized release yet. Though Viz Media has announced that they have picked up the license for this part but do not know when they will release it at the moment.
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    • Now that the anime is out, there is a fansub group who have created a subtitle track based on the Duwang Scans.
  • God Never Said That: Due to the following part introducing Requiem Stands, many people have stated that Yoshikage's Bites The Dust was a Requiem Stand. Word of God has never stated anything of that sort and instead explains it as a new power he was given by the Stand Arrow that matched what he needed. The ability may have formed the idea for Requiem Stands since Araki was starting to toy with the idea of Stand's evolving during this part, but within part 4, it is explicitly stated to be a new ability.
  • Musical Theme Naming: JoJo has always been known for doing this, but similarly to how Purple Haze Feedback had a common naming theme of Jimi Hendrix, Diamond is Unbreakable has a common naming theme of Pink Floyd. Even Part 4's name is based on one of their songs. In regards to what Stands and characters are named after Pink Floyd songs...
  • The Other Darrin: According to Daisuke Ono, despite being cast in All-Star Battle and Eyes of Heaven, the actors have to re-audition for the roles in the anime. As such, many characters in the Part 4 anime had different voices from the games.
  • Post-Script Season: Araki had initially intended the franchise to be a trilogy ending with Stardust Crusaders since the ending tied up the loose ends from the first two parts. As such Diamond is Unbreakable feels more like a standalone story that expands on some of the elements introduced in Stardust Crusaders but isn't necessarily a direct sequel. Vento Aureo would follow suit on this trope but not Stone Ocean.
  • Promoted Fanboy:
    • Similar to Daisuke Ono, Josuke's voice actor in All-Star Battle Wataru Hatano was a fan of the series before voicing his character. In fact Josuke is his favorite character in the series.
    • Kira Buckland has been vocal of her love of the Jojo series, and has even campaigned to be the voice of Jolyne Cujoh when Stone Ocean is animated. But until then, she's been cast as Reimi Sugimoto.
  • Recast as a Regular: Jalen K. Cassell, the English voice of Vanilla Ice for a few episodes in Stardust Crusaders, now voices Okuyasu.
  • Relationship Voice Actor:
  • Role Reprise: Among the characters returning from the Cyberconnect games, Okuyasu, Akira, and Shigechi were the only characters to have their voice actors return for the anime. Likewise Daisuke Ono and Unshou Ishizuka reprise their roles as Jotaro and Joseph for the anime.
  • Shrug of God:
    • Araki has refused to explicit anything about Josuke's flashback where a young Josuke is saved by an unknown delinquent that resembles him. Any question about possible implications (from a possible time travel plotline to a simple coincidence) has always been met with a flat refusal to talk about the incident from Araki's part.
    • The alien/human nature of Mikitaka Hazekura/Nu Mikitakazo Nshi is purposefully left ambiguous by Araki. The closest he has come to answering is to state in an artbook that Aliens are "just barely acceptable" within the JoJo fiction, without directly referring to Mikitaka himself.
  • Star-Making Role: Billy Kametz as Josuke. Prior to the series, he had mostly played secondary or minor characters in mobile game adaptations of various properties (such as Avengers Academy and Family Guy: The Quest for Stuff), but found himself a variety of more roles after playing Josuke.
  • Unintentional Period Piece: Despite being set in the then-future of 1999, this manga couldn’t escape this. It features then current technology and fashion for what was popular in the early 1990s (the time of the Manga’s release) instead of late 1990s (the set time of the manga).
  • What Could Have Been:
    • Seeing as how Morioh is based on Araki's hometown Sendai, he had initially wanted to name it as such but felt it would anger people.
    • Araki also wanted to explore Kira's childhood in-depth, but eventually decided against it as he felt that it would be in bad taste to make a Serial Killer too sympathetic.
  • Word of Saint Paul: In the Toonami broadcast of the final episode of the season, Kira's infamous "I had a boner" line was changed to "It gave me a rock-hard *BEEP*". According to Kira's English voice actor, D.C. Douglas, the censored word was "cock".
  • Write What You Know:
    • Araki based Morioh on his hometown Sendai. Morioh is stated to be a town in S City within the M Prefecture referencing Sendai and its real life prefecture the Miyagi Prefecture.
    • The Stray Cat arc was based on an experience Araki had with his grandfather's cat Chako. One day Chako scratched Araki in the face with Araki becoming suspicious of him since then.
  • Write Who You Know: Araki based Tama on his grandfather's cat Chako.
  • Written by Cast Member: Jalen K. Cassell writes the English ADR script and voices Okuyasu.
  • Writing by the Seat of Your Pants: Araki is known for this, but aside from Part 8, it's probably most apparent here. The first half of the series goes through implied Big Bads like there's a revolving door. Even Kira is utterly backed into a corner shortly after his introduction just like the others. As if Araki realized he should probably settle on a true Big Bad by that point, Kira gets bailed out at the last possible second, allowing him to secure his place as the Part's main villain. The anime adaptation helps offset this by adding scenes that tease Kira from the very beginning.


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