* EstrogenBrigade:
** Well known for their rather large female fanbase, to the point where one reader poll found that female readership was around 52%. So well known, in fact, that it was the fandom terminology used for homoerotic doujins about their properties (''Captain Tsubasa'', ''Slam Dunk'', and ''Saint Seiya'') that led to the term {{Yaoi}} being used as fanspeak.
** Part of the reason BishonenJumpSyndrome is attributed to ([[TropeNamer and named after]]) them is because of recruiting artists that seemingly tweak their characters' body types to match female standards of male beauty (skinnier physique, thin lips, chiseled face, luscious hair, etc) in order to capture more female readers.
* FandomRivalry:
** Inevitable, really, but surprisingly less common than you might think. Back in the old days, it was ''Franchise/DragonBall'' vs ''Manga/SailorMoon'', ''Manga/FullmetalAlchemist'' vs ''Manga/InuYasha'', and ''Franchise/DragonBall'' vs ''Manga/SaintSeiya''.
** Within the ''Jump'' fandom itself, the main focus was on the Big Three (most popular shonen series over the past decade) in the early 2000s - ''Manga/OnePiece'' vs ''Manga/{{Naruto}}'' vs ''Manga/{{Bleach}}'', with ''Shonen Magazine'''s ''Manga/FairyTail'' and ''{{Manga/Toriko}}'' entering the fray in the early 2010s. Late 2010s rivalries had ''One Piece'' vs ''Manga/MyHeroAcademia'' and ''Manga/BlackClover''.
** Fans of ''Jump'' tend to go head-to-head with fans of rival books ''Shonen Sunday'' and ''Shonen Magazine''.
* GermansLoveDavidHasselhoff: The old English slogan wasn't kidding when they called it "The World's Most Popular Manga". When you see any young western fans talking about a series they grew up with, you can bet it would have come from ''Jump''.
* HilariousInHindsight:
** While the Japanese fandom doesn't have a "Big Three" concept like the Western fandom, ''Jump'' contributor Creator/GoNagai did mention in an interview for the magazine that it was good to have around three or so series as tentpoles for any magazine.
** ''Jump'''s resounding popularity in the U.S. arguably was predicted in the 70s -- ''Anime/SpeedRacer'', one of the quintessential anime of the boomer generation, was adapted from the pages of its predecessor ''Shonen Book''.
** The derisive "Shoujo Jump" nickname ended up becoming prophetic when classic Shoujo romance ''Manga/BoysOverFlowers'' got its sequel published in ''Shonen Jump+" with little to no change in content.
* MorePopularSpinoff: Few people know that ''Monthly Shonen Jump'' was the magazine's original incarnation. The weekly version proved so popular, the monthly one was revived to have a bit of extra content; sadly, it was not long before it was cancelled and replaced with its successor ''Jump SQ''.