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Icon-fourze.png This article is about an ally in Kamen Rider Fourze.

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.


Movie War Ultimatum

Heisei Generations FINAL

In late 2018, Yuki had launched on a mission into space from Russia, where Kengo operated mission control, while the Enigma device began to combine the world with the World of Build. Ultimately, the crisis was resolved within a day through the efforts of several Kamen Riders including Fourze. Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders

Kamen Rider Zi-O

Tomoko, Miu, Kengo, Gentaro, Yuki, Shun and JK in Zi-O.jpg


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

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 ).png

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.

Zodiarts Form

Gemini Zodiarts

Gemini Zodiarts

  • Height: 218 cm
  • Weight: 182 kg
Powers and Abilities
Horoscopes can teleport themselves to any desired places.
Dustard Creation
Horoscopes can create Dustards from Stardusts.
Supernova (超新星, Chōshinsei)
The signature power of Horoscopes, using this can either assume a more powerful form or gain a new technique. In Gemini's case, it allows the Gemini Zodiarts to produce a clone of herself.
Self Detonation
The Gemini clone can act as a living bomb.
Lynceus (リュンケウス, Ryunkeus)
Throwing red cards that explode on contact.
Idas (イーダス, Īdasu)
Throwing blue cards that are remote explosives that explode when she snaps her fingers.

This form is exclusive to episode 44.

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.

Concept Art

Gemini Zodiarts concept art

Gemini Zodiarts was designed by Kia Asamiya (麻宮 騎亜, Asamiya Ki'a).


  • 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.



Icon-fourze.png Kamen Rider Fourze
Kamen Riders
Gentaro Kisaragi - Ryusei Sakuta - Nadeshiko Misaki - Kamen Rider Ikaros - Rider Hunter Boot
Fourze Driver - Meteor Driver- Nadeshiko Driver - Astroswitches - Astroswitch Case - Billy the Rod - Hee-Hackgun - NS-MagPhone - Meteor Galaxy - Barizun Sword - Meteor Storm Shaft - Machine Massigler - Machine Meteorstar - Powerdizer
Kamen Rider Club
Initial Members
Yuki Jojima - Kengo Utahoshi - Miu Kazashiro - Shun Daimonji - Tomoko Nozama - JK - Chuta Ohsugi - Ran Kuroki - Haru Kusao
5 Years After
Saburo Kazeta - Rumi Komaki - Daita Kondou - Chikao Nezu - Miyoko Ohki
Ishinomori Characters
Inazuman - XVII - Skydain - Groundain - Black Knight - Inga Blink
The Horoscopes: Sagittarius - Virgo - Leo - Libra - Scorpio - Cancer - Aries - Capricorn - Aquarius - Taurus - Gemini - Pisces

Zodiarts: Orion - Chameleon - Unicorn - Hound - Altar - Pyxis - Perseus - Lynx - Dragon - Pegasus - Cygnus - Coma - Musca - Hercules - Lepus

Stardust Ninja Dustards
Foundation X
Lem Kannagi - Katal - Solaris - Chancellor Kiima - Suddendath Beta
Xatan - Eel - Gahra