* ActorAllusion: Hayami Kouhei shows up in #13 in a dark red leather jacket - the color of [[Series/KamenRiderBlade Kamen Rider Garren.]] Even before that though, Fourze's henshin pose resembled Garren the most, and one ''Super Hero Taisen'' [[{{Omake}} Net Movie]] has [[spoiler:Kouhei getting the Garren Buckle!]]
** In the net movies, Gentaro actually meets up with Garren and he and Tomoko see a video of Garren...who looks just like their principal. Garren insists that his name is Tachibana Sakuya, not Kouhei Hayami...which Gentaro thinks refers to Meteor's benefactor Tachibana, and his mind starts to overload from confusion.
** Tokuda Yayoi, played by Rije from ''Abaranger'', could count - [[spoiler:Yayoi had issue with being forced through graduation, while Rijie suffered several forced age shifts.]]
** And Runa Natsui ([[Series/SamuraiSentaiShinkenger Kaoru Shiba/Princess Shinken Red]]) does get a scene involving swinging something two-handed in #31.
** In #43, [[Series/KamenRiderOOO Doctor Maki's]] CreepyDoll can be seen lounging on Yuuki's front porch. Then we meet her father...
* [[BackedByThePentagon Backed by JAXA]]: To the point that the [[http://www.jaxa.jp/about/centers/tksc/index_e.html Tsukuba Space Center]] is seen in the opening sequence.
* DawsonCasting: Shun is a high school student portrayed by a 22-year-old actor.
* FanNickname: You know it's going to be [[http://www.youtube.com/watch?v=1GAKOLOnfV4 Rocket Man]], just look at his suit shape and attacks...
** Then there is Kamen Rider {{Playstation}}.
** And Kamen Rider Onigiri Head.
** And, of course, [[Anime/TengenToppaGurrenLagann Kamina]] Rider, since Gentaro is considered by some to be an {{Expy}} of the famous {{Badass}}.
** Kamen Rider Meteor's fighting style has led to him being called Kamen Rider BruceLee.
** As soon as it was first shown, fans started referring to [[spoiler:Meteor Storm's finisher]] as a ''Anime/{{Beyblade}}''.
* HeyItsThatGuy: [[Series/TomicaHeroRescueFire Fire-5]] appears in the first two episodes [[spoiler: and #13-14]] as the Orion Zodiarts user.
** Tomoko was [[OneLiterOfTears Aya's youngest sister]]!
** [[Series/KamenRiderRyuki Alternative Zero]] guest stars in episodes 7-8.
** Amane from ''Series/KamenRiderBlade'' appears as an Amanogawa student this time, after her stint as an art student in ''Series/KamenRiderDouble''.
** For that matter, Sakuya Tachibana/Kamen Rider Garren appears as the principal of AGHS starting from #13. The ''[[Film/KamenRiderXSuperSentaiSuperheroTaisen Super Hero Taisen]]'' net movies lampshade this in one short where it's suggested that Tachibana is a repressed personality of Hayami's, and Kengo tries to bring it out.
*** He also reprises his role as Garren in the net movies for ''Everyone's Space Time''.
** Abe was previously Mana's cousin Taichi in ''Series/KamenRiderAgito''.
** Nao Nagasawa ([[Series/NinpuuSentaiHurricaneger Nanami Nono/Hurricane Blue]] and [[Series/KamenRiderDouble Lily Shirogane]]) appears as Gentaro's new teacher in #21-22. Interestingly, one of the guys at the gym was Gozo[=/=]Metal Dopant.
** In #30, [[Series/SamuraiSentaiShinkenger Princess Shinken Red]] appears as a classmate at Ryuusei's old school.
** Yayoi Tokuda was Rije in ''Series/BakuryuuSentaiAbaranger''.
** In ''Movie Wars [=MegaMax=]'', [[Series/MahouSentaiMagiranger Magi Mother]] is working with Foundation X!
** Yuki's dad is ''[[Series/KamenRiderOOO Doctor Maki.]]''
** Shun's dad appeared in ''Series/SamuraiSentaiShinkenger'', as ''Ryuunosuke's dad''. Guess fathering TheLancer is in his genes.
** In the summer movie, [[Series/ChikyuuSentaiFiveman Five Yellow]] appears as a Foundation X executive, making her the second past Sentai hero to appear as a member of Foundation X in ''Fourze'' alone.
** Norio Eguchi [[spoiler:(Cygnus Zodiarts)]] took losing [[Series/SamuraiSentaiShinkenger Kotoha]] ''really'' hard...
* HeyItsThatVoice: Creator/NobuyukiHiyama takes the role of Narrator [[spoiler: and Ryusei/Kamen Rider Meteor's support Tachibana]] and seems to be making [[Anime/GaoGaiGar Guy Shishioh]] the story teller.
** One of the [[MayNakabayashi people]] singing Fourze's new battle theme is [[Anime/MacrossFrontier Sheryl Nome]].
** Virgo Zodiarts is voiced by Creator/RieTanaka. Seems like [[Anime/MobileSuitGundamSEED Lacus Clyne]] is playing another pink character.
** Gemini is voiced by HiromiKonno, who previously exhibited a SplitPersonality as [[Manga/LuckyStar Kogami Akira.]]
* IKnewIt: [[spoiler: Sarina Sonoda]] is Scorpion Zodiarts.
** And [[spoiler: Ohsugi-sensei ends up becoming the Kamen Rider Club adviser]].
** [[spoiler: As well Virgo Zodiarts, where her true identity is Emoto]].
** [[spoiler: Some people had that attitude about Emoto's alter-ego Tachibana, too.]]
** [[spoiler: And now we know that Kengo is the owner of Core Switch. As well as have a status like [[Series/KamenRiderDouble Philip]] and [[Series/KamenRiderOOO Ankh]]]].
* NamesTheSame: It's not so long since there was [[Series/KamenRiderKiva another Kengo]] (depicted as a {{Jerkass}} at one point) in ''Kamen Rider'' ...
** Miu Kazashiro shares a name with [[Series/EngineSentaiGoOnger Go-on Silver]].
** Any relation between Sarina Sonoda and [[Series/KamenRiderFaiz a certain past Rider heroine]]?
*** That might be a second line of ThemeNaming, since Chuta Ohsugi seems to follow [[Series/KamenRiderRyuki Daisuke Okubo.]]
** Norio Eguchi[[spoiler:(later revealed to be the vigilante Cygnus)]]'s first name means "man of law", just like his VERY well-known namesake, NorioWakamoto!
*** From the same arc, we have a [[Manga/DeathNote mentally-unsound girl in lace named Misa]].
** Kamen Rider Meteor isn't the first Rider to have a [[Series/KamenRiderAgito Storm form]]. Interestingly, both are blue and staff-wielding.
** And now there's Goto, the Capricon Horoscopes - we just had another [[Series/KamenRiderOOO Goto]], who also had a huge dream, but fortunately avoided the easy way to realize it.
* PlayingAgainstType: [[spoiler:NobuyukiHiyama]] as the {{Chessmaster}} and ManBehindTheMan Tachibana [[spoiler:who even has a YouHaveFailedMe moment in #27]].
* PropRecycling: Spares of the first four switches (Rocket, Launcher, Drill, Radar) sometimes get reused as pre-tuned switches - the [=MagPhone=] apparently started as a totally black Rocket and Radar. Then there's once-off examples like [[spoiler:the gold switch that triggers the Rabbit Hutch locker and even the Core Switch.]]
* RealitySubtext: As revealed by the production blog after the show wrapped, the scene at the start of the final episode where [[spoiler:Yuki reads Kengo's farewell letter after he's been killed by Gamou]], was the last scene filmed. According to director Koichi Sakamoto, the KRC's actors had become as close as family over the course of the shoot, thus the tears being shed were their real tears over the fact that they were about to go their separate ways. It was made worse was the fact that [[spoiler:Ryuki Takahashi, Kengo's actor,]] couldn't be on the set for obvious plot reasons. The same blog post had Fumika Shimizu, Yuki's actress, reveal that she actually considered messing up her lines on purpose just so it wouldn't have to end.
* RecycledScript: You'd be surprised just how many connections to ''Series/KamenRiderDouble'' this show has.
* [[SoMyKidsCanWatch So My]] ''[[InvertedTrope Par]][[PeripheryDemographic ents]]'' [[SoMyKidsCanWatch Can Watch]]: [[http://www.jefusion.com/2011/07/my-son-is-now-kamen-rider-sota-fukushis.html The reason]] why actor Sota Fukishi took the role of Gentaro.
** Played straight for Anna Tsuchiya, who does the opening song for her kids based on much her son loved ''Series/KamenRiderOOO'' back when it aired.
* ThrowItIn: Fumika Shimizu (who plays Yuuki) actually improvised the Hayabusa song, which the production crew allowed her to record (and used for a later episode).
* WhatCouldHaveBeen: Originally, Fourze was to have a much stronger anniversary aspect that what we were given. The original plan was to have past Riders appear and team up with Fourze. Sadly, this idea was scrapped because the producers thought it was too soon to have past Riders cameo after Decade.
* Fourze breaks the tradition that [[Series/KamenRiderDouble W's]] [=FangJoker=] and [[Series/KamenRiderOOO OOO's]] [=TaJaDor=] of premiering the MidSeasonUpgrade in the ''Movie Wars'' film before showing it in the series proper. In this case Rocket States was shown in the movie but Fourze true upgrade is Magnet States, which premiered in the tv show proper.
** Rocket States did later make a proper appearance in the series, in episode 41.