If you haven't noticed, the author has really Shown Their Work in regards to their knowledge of Jojo's canon and a wide variety of real life areas.
Continuity Nod
- Kakyoin's name is not actually Kakyoin Noriaki- it is in fact Kakyoin Tenmei. It became Noriaki due to an alternate kanji reading on the editors part. Araki still refers to the character as Tenmei.
- Stands being the result of a symbiosis with an viral organism that came to Earth from a meteor. Said meteor was the metal that forged the Stand arrows.
- In the Eyes of Heaven timeline, Polnareff stayed in Egypt to look after Avdol, Iggy, and Kakyoin while they recovered from their injuries.
- Jonathan's head surviving after Dio stole his body also happened in Jorge Joestar.
- The last chapter of The Star, Inverted is essentially a long series of Continuity Nods to Stardust Crusaders.
- Hol Horse's attempted friendly behavior in And Then They Were Roommates and mention of Polnareff is likely reference to the scrapped 'Crusader Hol Horse' plot line that Araki had considered at one point.
- Okuyasu's father was named Nijimura Mansaku for the live-action adaptation of Diamond Is Unbreakable.
- Even the Speedwagon Foundation isn't sure if Mikitaka is an alien or a Stand user.
- Boingo, the comic book Stand user, making good on his change of heart.
- Tenmei's favorite childhood character being Q-Taro is a Call-Forward to the Justice Arc in Stardust Crusaders, when Jotaro uses the alias 'Qtaro' to trick Enyaba.
Shout-Out
- Jonathan's "stern fatherly disapproval" is a Homestuck reference of all things.
- Holly calls her Stand Sophisticated Lady, after the jazz song by Duke Ellington.
- In Kitsune-tsuki, Tenmei and Aiko's gacha prizes are characters from Panda Kopanda and Obake no Q-Taro, actual anime from the '70s.
- In Magic Trick, Jolyne plays Metroid.
- THREAD: Croissant Sandwich is based off of a real life workplace incident
. - Jotaro quotes McCree when debuting his "Real American" voice.
- The "howdy, howdy, howdy" is a reference to this scene from Toy Story.
- The "howdy, howdy, howdy" is a reference to this scene from Toy Story
Truth in Television
- In The Star, Inverted, Jotaro and Kakyoin have missed months of school due to Egypt, but still graduate with high grades, surprising Joseph. In Japan, school attendance is not a large factor in academic standing- final exams are.
- In Kitsune-tsuki, Tenmei's aunt can tell something is wrong with her nephew, but largely refuses to comment or act on it. Mental health in Japan is usually considered an immediate family matter, and an outsider commenting on it would be seen as intruding in someone's private affairs.
- In Knock, Knock, the underage Tenmei and Jotaro somehow acquire alcohol. In Japan, underage drinking is on the same level as jaywalking in terms of societal taboo and active enforcement, and it is borderline absurdly easy for teens and adult-passing minors to buy alcohol.
- The Kakyoin family is mentioned as being well-known for having red hair and light eyes as children that later darken with age. In places with former Dutch ports, like Japan and Taiwan, certain bloodlines are prone to lighter hair and eyes as children due to inter-racial relationships with the traders.
- Tenmei's glasses have photochromic lenses(aka Transitions lenses). As per usual with this series, it's not a case of Anachronism Stew- photochromic lenses have actually been around since the 1960s.
- In Hierophant Green's chapter of Well, I Must Have Grown A Little, Tenmei mentions the Japanese practice of senbaruzu- a wreath of one-thousand paper cranes. When people are recovering in the hospital, it's customary to make such wreaths in order to wish someone well, much the way Western folks will bring bouquets of flowers in the same situation.
- In irezumi, most of the tattoos and their explanations are based heavily in Japanese symbology.
- In Demolition Man, Caesar, Tenmei, and Josuke are present in the aftermath of the first Kira encounter, and Caesar tells Josuke to prioritize healing Koichi, who is more severely injured, as opposed to his first choice Jotaro (who Josuke wanted to treat first as the strongest fighter). This is in line with triage, the process of prioritizing who receives medical treatment first in an emergency or time-sensitive situation.
