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Trivia / Kamen Rider Double

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  • Acting for Two:
  • Actor Allusion:
    • Aya Sugimoto, best known as Queen Beryl, appears in The Movie Double Forever: A to Z as a Maria S Cranberry.
    • Shotaro threw an epic one in "J's Labyrinth" when he wants to enter a models-only recreation club - Renn Kiriyama is, in reality, an actor/model.
      Guard: Members only, please. This club is for models only.
      Shotaro: Haha, that's sweet. I'm a model. So, ciao.note 
    • Also in Double Forever, Elizabeth manages to recover the T2 Accel, Key, and Bird Memories, a nod to the fact that her and Queen's actresses are members of the girl group AKB48.
    • Episode 45's first two minutes are devoted to reminding us of Yuka Hirata's previous role by letting her perform her extreme tsun-tsun, extreme dere-dere schtick.
    • Yoshie Gotou, one of the Stage Moms in "The O Chain", actually appeared in Kamen Rider Kiva as the woman who went into sports archery after her own Stage Mom pushed her to learn the violin. Karma's the real bitch here.
    • At one point, Jinno notes that Takeshi would be a nice name. Also, his use of Gratuitous English mirrors his schtick as a Fake American. And the name "Catherine" pops up later... note 
    • Masayuki Deai (Trigger Dopant), though not for one of his own characters. In W Returns: Eternal, he gives the classic BoukenRed "Good job !" and thumbs up.
    • In Begins Night (W's half of Movie Wars 2010) there's this hefty Museum Mook (Giant Mook?) who jumps and attempts a Rider Punch on Soukichi. He's played by Jiro Okamoto, suit actor for Kamen Rider BLACK.
    • Episodes 21-22 feature Ayumi Kinoshita as a police officer obsessed with revenge.
    • The Fuutic Idol judge who wasn't a Creator Cameo by the opening's singers was played by Ichirou Mizuki, who sung many songs in the Showa era, including the openings for X, Stronger, and Skyrider.
  • Bonus Episode: Two Hyper Battle DVDs, Kamen Rider W: Donburi's α/Farewell Beloved Recipe and Kamen Rider W DVD: Gaia Memory Encyclopedia, was released with an issue of Televi-Kun Magazine.
  • Casting Gag: The boy who Shotaro helps (and teaches the way of being hard-boiled) in the last episode is played by the same actor who played preteen Shotaro in the first episode flashback. He also plays Shotaro again in a small part of Movie War Core in the Skull segment.
  • Creator's Favorite: Tomoyuki Dan (Isaka) has stated that he really liked the Weather Dopant, his own Dopant form, for its incredibly cool design.
  • Dawson Casting: Mitsuru Matsuoka was 40 when he played Katsumi, who appears to be in his early to mid-20s based off the information given. Possibly justified since storywise he was growing up using an artificial chemical.
  • Defictionalization: Queen and Elizabeth are played by two members of idol group AKB48, and when they released their joint single "Love♡Wars", the Liar Dopant arc had them appear on an American Idol-esque contest (Fuuuuuutic Idol) performing the song in order to win a major label release.
  • Fake Nationality: Kazu is played by Korean actor Gong Teyu.
  • He Also Did: Watcherman's actor, comedian Tomoaki "Nasubi" Hamatsu, is generally best known for starring in Susunu! Denpa Shōnen, an early Reality TV show where he had to spend a year living off of prizes he won via mail-away sweepstakes contests.
  • In Memoriam: The S.I.C. Hero Saga novel Playback, which covers this series, is a tribute to Shotaro Ishinomori, featuring an Alternate Universe version of the franchise's creator being guided by Philip as he learns what has become of his work.
  • No Export for You: Like most of the rest of the Kamen Rider franchise, it isn't legally available in the west. Perplexingly, despite Double itself not being released there, Fuuto P.I. has an ongoing French release and the anime adaptation was released on Crunchyroll and other streaming platforms.
  • Promoted Fanboy: Renn Kiriyama was a fan of Kamen Rider BLACK as a child.
  • The Other Darrin: The upcoming Fuuto PI anime adaptation will have the core casts be voiced by voice actors as opposed to their original actors from the TV series. Which leads us to:
  • Role Reprise: The voice actors for Kamen Rider W casts from the action-adventure game Memory of Heroez are set to reprise their respective roles for the anime; Yoshimasa Hosoya as Shotaro Hidari, Kōki Uchiyama as Phillip, Mikako Komatsu as Akiko Narumi, and Makoto Furukawa as Ryu Terui.
  • Sequel in Another Medium: The manga/anime Fuuto PI picks up some time after the OOO crossover movie.
  • Screwed by the Network: Masaki Suda implied during a magazine interview in 2017 that his agency has been the reason he hasn't returned to his role as Philip since 2011.
  • Star-Making Role: Masaki Suda's career really took off after he played Philip; when Kamen Rider Heisei Generations FOREVER rolled around, he wanted to cameo but couldn't do so because his schedule was booked solid for two years straight.
  • What Could Have Been
    • As testified by head writer Riku Sanjo and producer Hideaki Tsukada, Double was conceived during the run of Kiva and was infact planned initially to follow that series in mid-January of 2009 as normal but was pushed back when Decade was thrown into the mix, Decade's purpose being to celebrate ten years of the Heisei Kamen Rider revival as well as having a reduced episode count allowing future Rider shows to premiere in the fall, balancing Super Sentai premiere time in spring, thus Double marked the beginning of the next stage of the franchise.
    • "The O Chain" two-parter reveals that Shroud's ultimate endgame for having Ryu partner with Philip would be CycloneAccel Xtreme, the ultimate weapon in her war against Ryubee. All we get is a brief Imagine Spot-like depiction (done by digitally recoloring CycloneJoker Xtreme to have a red left side and Accel's blue headlight "eyes"), since in-story Ryu would never break up Shotaro and Philip's partnership and he'd long since gotten past his hatred.
    • The form does appear in Kamen Rider Climax Heroes OOO as a bonus character, where it's basically a Palette Swap of CJX wielding the Engine Blade and Prism Bicker.
    • As revealed in an interview with producers Hideaki Tsukada and Shinichiro Shirakura, the Fuuto P.I. series came about after a plan for a "Joker City" V-Cinema, which was to bring back Renn Kiriyama as Shotaro Hidari, sadly did not work out.
  • Word of God: The series itself is confirmed by the staff to be a homage to the Showa Era, from the little things such as the scarf to the overall feel of the series.