This article is about a/an ally in Kamen Rider Fourze.
Yuki Jojima
(RAW) Kamen Rider Fourze - 01 (DivX6.8.4 TQ4 704x396 24fps) -5CF3B079--(028420)07-20-53-
Gemini Zodiarts (temporary)
Gender: Female
Series: Kamen Rider Fourze
Ally Type: Member of Kamen Rider Club
Homeworld: Earth (Main Timeline Continuity)
First Appearance: Kamen Rider OOO Wonderful: The Shogun and the 21 Core Medals
Last Appearance: Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum
Number of Episode
48 (Fourze)
1 (OOO)
5 (Movies)
Full list of appearances
Actor: Fumika Shimizu
Kanon Kasuga (child)

Yuki Jojima (城島 ユウキ Jōjima Yūki) is one of the main characters in Kamen Rider Fourze. She is a childhood friend of Gentaro Kisaragi and one of Kengo Utahoshi's only friends along with Gentaro. She is also a member of the Kamen Rider Club, joining the group in her second year and becoming its president during her third year.


Yuki is cheerful and bright while calling herself a "space otaku", having a deep interest in space science going back to when she was a child and occasionally going to the JAXA building after school.

She is also extremely eccentric to the point of worshiping rockets as deities and attempting to illegally add space-themed books into the school library. Despite this, Yuki's heart is in the right place, and attempts to keep the cheer in some of the darker times of the Kamen Rider Club.

Other appearances

Kamen Rider Travelers Record

Fourze with Kengo, Yuki, and Philip Travelers Senki

Yuki with Fourze, Kengo and Philip in Kamen Rider Travelers Record.

Yuki appears in the video game Kamen Rider Travelers Record.

Final Stage

Doll (Yuki )

Yuki returns in the Final Stage but was turned into a doll by the revived Gemini. Kamen Rider Fourze: Final Stage



Main article: Foodroids

The Foodroids are functional spy devices and utility gadgets that aid the Kamen Rider Club. They have a limited amount of AI that allows them to respond to their human companions by way of performing tasks. They also on some occasions have shown initiative to perform tasks that fall under their set of abilities. They are activated by using their respective Astroswitches.


Main article: Astroswitches

In the movie Kamen Rider Fourze the Movie: Everyone, Space is Here!, she used the Cosmic Switch as a relay to help create the Fusion Switch.

Hayabusa doll

Since her third year, prior to the Kyoto field trip, Yuki acquired a plush doll modeled after the Hayabusa satellite.

Behind the scenes


Yuki Jojima is portrayed by Fumika Shimizu (清水 富美加 Shimizu Fumika). As a child, Yuki is portrayed by Kanon Kasuga (春日 香音 Kasuga Kanon).

Musical Themes

Yuki has a leitmotif, titled "Yuki Jojima", and it has variations in "Hayabusa-Kun" and "Hayabusa Metal".


Yuki is named after Joji Yuki (結城 丈二 Yūki Jōji) (Riderman) from the Kamen Rider V3 series. This homage is alluded to in Fourze's Movie War Mega Max portion, Kamen Rider Fourze: Nadeshiko, Descend, where Yuki wears a makeshift Riderman costume as part of the Kamen Rider Club's Seven Legendary Riders cosplay. Her name, in the alternate romanization of "Yuuki Jousima", is also an anagram of "I am Soujikyuu" which plays with her connection to the Gemini Zodiarts.


  • It should be noted that Yuki could have been foreshadowed as both sides of the Gemini Zodiarts because the two main writers of the show portray her differently: the heart of the team (light; Nakashima) or a space-obsessed kook (dark; Sanjo).
  • Yuki's parents are shown to be as equally wacky as her. The Jojima family often immerses themselves in country-themed dinners down to dressing in cultural clothing.
  • Yuki is the only side-character to appear during a movie cameo of the Kamen Rider about to air; she contacts Gentaro while he is assisting OOO in Kamen Rider OOO Wonderful: The Shogun and the 21 Core Medals.


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