is a Japanese tokusatsu series that serves as the 22nd installment in the Kamen Rider franchise and the 13th entry in the Heisei era. Transfer student Gentaro Kisaragi transforms into the titular hero Kamen Rider Fourze to battle the constellation-themed monsters called Zodiarts. Series' producer Hideaki Tsukuda initially planned on including various past Kamen Riders in the series to commemorate Kamen Riders 40th anniversary. However, due to past series Kamen Rider Decade celebrating the 10th anniversary of the Heisei Kamen Riders, Kamen Rider Fourze appreciates the previous Kamen Riders' history and treats them as urban legends in-universe.Otonafami, No. 36
The primary setting of the series is the fictional , abbreviated as , which the main characters attend. Additionally, the monstrous Horoscopes seek to transform AGHS' students and faculty into more of their kind to expand their ranks.
Kamen Rider Club The is a club that Gentaro Kisaragi forms to gain new friends at AGHS, using past Kamen Riders as inspiration. After Gentaro becomes Kamen Rider Fourze, the club's members assist him in his battles against the Zodiarts and investigate the urban legends that surround the past Kamen Riders' existence.Uchusen, Vol. 133Toei Hero Max, Vol. 38 The club's headquarters is the remains of the moonbase, which is accessed by a powered portal found in a locker in an abandoned section of the AGHS campus and was originally owned by the , abbreviated as , which developed Fourze's technology and the Zodiarts Switches. After losing the Rabbit Hatch to the Zodiarts in the series finale, the Kamen Rider Club is reworked to become the Earth-based .
Gentaro Kisaragi is a second-year, later third-year, student at AGHS with a reckless, bad-boy image due to his delinquent yankee fashion sense coupled with a sociable attitude and a desire to befriend everyone he comes across. Throughout his time at AGHS, he goes on to become Kamen Rider Fourze and form the Kamen Rider Club.
Five years later, as of the events of the crossover film Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum, Gentaro has become an AGHS teacher and the Kamen Rider Club's new academic advisor before sacrificing his Rider powers to help his student Saburo Kazeta defeat Kageto Banba.
The Fourze System consists of a space suit, the belt, and 40 numbered , all of which harness Cosmic Energy and were reverse-engineered from the Presenters' Core Switch by Rokuro Utahoshi, who was inspired by the Four Symbols and a hypothetical friendship-based system used by Kyoto's citizens' ancestors. As such, Gentaro is the only one who can access the Fourze System's full potential. Additionally, Mitsuaki Gamou compares Fourze's power to that of a gravitational lens due to Gentaro's influence on Astroswitches and Zodiarts Switches.
Utilizing the Fourze Driver and four Astroswitches, Gentaro can transform into Kamen Rider Fourze . While transformed, he is equipped with a hover pack. He can also activate the Astroswitches' to assist him in combat and perform finishers based on his active Fourze Modules, such as the via the right forearm-mounted and the left shin-mounted . His personal vehicle is the motorcycle. Additionally, the power of certain Astroswitches allow Gentaro to assume varying forms, which are as follows: : An auxiliary form accessed from the Switch that grants electrokinesis. In this form, Gentaro wields the baton. His Limit Breaks in this form are the , , and via the Billy the Rod and the via the Drill Module. : An auxiliary form accessed from the Switch that grants thermokinesis. In this form, Gentaro wields the , which has a pyrokinetic for performing the Limit Break and a hydrokinetic for performing a Limit Break that shoots pressurized water. : Gentaro's super form accessed from the two-in-one , which consists of the joystick-like and Switches, that grants magnokinesis. In this form, he is equipped with the shoulder-mounted and railguns, which he can detach from his armor and combine to form the drone for combat assistance. However, using this form restricts Gentaro's mobility. His Limit Breaks in this form are the via the NS-Magnet Cannon and the via the N and S Magnet Cannons. : Gentaro's final form accessed from the detonator-like Switch that grants the combined powers of all 40 numbered Astroswitches. In this form, he wields the , which has a club-like for performing a Limit Break that creates warp drives and a bladed for performing the Limit Break. However, the Cosmic Switch can only function if Gentaro maintains his friendships with every member of the Kamen Rider Club, as he will lose access to this form if even one friendship is in turmoil. During the final battle, Gentaro performs the Limit Break without any Fourze Modules in this form.
Additionally, Gentaro can use unique Astroswitches to achieve States that appear in supplemental media connected to the series, which are as follows: : The orange-colored evolved form of Base States accessed from the that equips Gentaro with a pair of Rocket Modules. His Limit Breaks in this form are the via the Rocket Modules and the via the Drill Module. During the events of the crossover film Kamen Rider × Super Sentai: Super Hero Taisen, Gentaro uses the Rocket Switch Super-1 and the to equip the Go-Busters' giant robot Go-BusterOh with a pair of Rocket and Drill Modules respectively, allowing it to perform the finisher. This form first appears in the crossover film Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max. : A special form accessed from the Switch that equips Gentaro with the right forearm-mounted . His Limit Break in this form is the . This form appears exclusively in the Hyper Battle DVD special Kamen Rider Fourze Hyper Battle DVD: Rocket Drill States of Friendship. : A special form accessed from the and Meteor Switches that allows Gentaro to use his and Kamen Rider Meteor's powers and weapons at once. His Limit Break in this form is the via the Drill Module. This form appears exclusively in the film Kamen Rider Fourze the Movie: Space, Here We Come! : The evolved form of Meteor Fusion States accessed from the Fusion, Meteor, and Switches that equips Gentaro with a pair of Rocket Modules, which allow him to perform the attack, and a pair of skis. His Limit Break in this form is the . This form appears exclusively in the crossover film Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum. : The blue-colored evolved form of Base States accessed from the that equips Gentaro with a pair of shin-mounted . This form appears exclusively in the tie-in novel Kamen Rider Fourze: Ama High Grad-Uation.
Gentaro Kisaragi is portrayed by . As a child, Gentaro is portrayed by .
Kengo Utahoshi is a second-year, later third-year, student and Gentaro's level-headed and intelligent partner as well as the , a physical construct made of Cosmic Energy that his adoptive father Rokuro created from the Core Switch that the alien "Presenters" sent to Earth to test humanity's ability to contact them, though Kengo was unaware of his true nature for most of his life. After losing Rokuro the day he was born and a year before the series, Kengo discovered the Fourze System, Rabbit Hatch, and the Zodiarts' existence and took on his father's mission to fight the monsters. Due to his weak physical constitution however, which he believed was a medical condition, Kengo is unable to properly utilize Rokuro's equipment and is forced to let Gentaro take his place while he serves as a tactician. Due to his desire to uphold his father's legacy, Kengo initially refuses to acknowledge the Kamen Rider Club, though he eventually warms up to them and Gentaro.
During his third year at AGHS, Kengo discovers the truth of Rokuro's death and realizes his nature as the Core Child. He uses his powers to foil Mitsuaki Gamou's plans to see the Presenters by destroying AGHS before intending to leave Earth and return to the Presenters himself with what he has learned about humanity. However, a vengeful Gamou destroys the Core Switch, causing the youth's body to dissolve into light particles. Following his final battle with Gentaro, Gamou revives Kengo as a human, leading to the latter staying on Earth with his friends.
Five years later, as of the events of the film Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum, Kengo became a scientist working to continue Rokuro and Gamou's dream of seeing the Presenters.
Kengo Utahoshi is portrayed by .
Yuki Jojima is a bright and cheerful second-year, later third-year, student and Gentaro's childhood friend who cares deeply for her friends. After hearing a voice from the stars as a child, she became obsessed with becoming an astronaut and went on to become a self-proclaimed "space otaku" in the present. After meeting Kengo on the day he found the Rabbit Hatch, Yuki supports him in his endeavors and convinces him to let Gentaro join them, becoming the founding members of the Kamen Rider Club in the process. During her third year, Yuki becomes the Kamen Rider Club's new president after Miu graduates, using her ingenuity to lead her friends in their battles against the Zodiarts.
Five years later, as of the events of the film Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum, Yuki fulfilled her dream of becoming an astronaut.
Yuki Jojima is portrayed by . As a child, Yuki is portrayed by .
Miu Kazashiro , a level-headed yet cocky third-year (later undergraduate) student, comes from an upper-class family, and becomes head cheerleader of AGHS, and two years running, a title she earned in the through effort and hard work. Among her philosophies as queen, she believes that she needs to know everything that occurs within the campus grounds and that one can only truly shine under their own power. Though she is well-loved by many at school, she displays a superiority complex over her classmates and sees those who are infatuated with her as sycophants who leech onto her for their own failure to shine. This mentality initially leads to her clashing with Gentaro. When her fellow cheerleader Tamae Sakuma humiliates her and reveals the negative aspects of her personality in front of their classmates in an attempt become the new queen, however, a humbled Miu is reminded of her passion and returns to compete in the Festival despite the odds being against her. After winning a third time, she accepts Gentaro's friendship and joins the Kamen Rider Club, using her natural leadership skills to become its president and working with Kengo to coordinate group efforts. Over time, she becomes more caring of others and willing to step in herself if necessary. Following her graduation, Miu names Yuki as the new president, while the former becomes the club's chairwoman as her chosen college is close to AGHS.
Five years later, as of the events of Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum, Miu has become a successful model.
Miu Kazashiro is portrayed by .
JK , better known as , is a cowardly first-year, later second-year, AGHS student with a gaudy appearance who serves as an information broker, trading secrets for favors. In his youth, he dreamed of becoming a rock star like his father, Keizo, and formed a rock band with his friend Tojiro Goto, only to give up the dream upon realizing he cannot sing. After learning of Gentaro's identity as Kamen Rider Fourze, JK agrees to keep the former's secret in exchange for protection from Fumihiro Nitta, a student the latter had wronged, while secretly intending to steal one of Gentaro's Astroswitches in an attempt to teach him a lesson about trust. However, JK is captured by Nitta, rescued by Gentaro, and learns the true meaning of friendship before joining the Kamen Rider Club, using his connections to aid the group in identifying Switchers, Zodiarts, and their targets.