Etymology
Kengo is named after Takeshi Hongo, better known as Kamen Rider #1. His name being an anagram for the Rider's identity. This homage is alluded to in Fourze's Movie War Mega Max portion, Kamen Rider Fourze: Nadeshiko, Descend, where Kengo wears a makeshift Kamen Rider #1 costume as part of the Kamen Rider Club's Seven Legendary Riders cosplay. Also, his surname Utahoshi contained the kanji, which translates into "star" to foreshadow his identity as the Core Switch.
Publication Information
- Host : Kengo Utahoshi
- Japanese : 歌星 賢吾
- Gender : Male
- Type : Fourze's partner, Kamen Rider Club Technician
- Season : Kamen Rider Fourze
- Homeworld : Earth (Main Timeline Continuity)
- First Appearance : Finale : The Medals of Tomorrow, Underwear, and Arms Held
- Last Appearance : Kamen Rider × Kamen Rider Wizard & Fourze : Movie War Ultimatum
- Appearances : 48 (Fourze), 1 (OOO), 4 (Movies)
- Potrayer : Ryuki Takahashi
- Main View : Full Episode
Personality
Kengo is a second year student (17 years old) at Amanogawa High School who is physically weak but has a strong will. Upon meeting Gentaro and an encounter with the Orion Zodiarts, he gave him the equipment to become Fourze, such as the Astroswitches and Machine Massigler, and acting as his tactician.
Kengo is a loner with a strong will and wants to follow through with his father's plans to fight the Zodiarts. Because of this, he tries remains distant from people to not get them involved. Kengo does however accept help from Yuki Jojima and Gentaro after some convincing. He is willing to go to lengths that puts him and his health in danger which limits his actions. Kengo does not acknowledge the existence of the Kamen Rider Club and refuse to be a member of the Club. Though he is Gentaro's partner, he insists that Gentaro refers to him by his surname instead of his given name, and much to his chagrin, Gentaro refuses to do so.
During the early days, Kengo still refused to acknowledge the Kamen Rider Club even as the number of members grew and saw them as an immature group who were taking the occurring events too lightly. After he gets trapped on the Moon and seems certain to die, he initially despairs until he realizes that his father was in the same position but didn't give in to his fear and created the Fourze system. He then speaks to Yuki, who convinces him that despite their light-hearted demeanor's everyone in the club is working hard to help him in fulfilling his dream of fighting the Zodiarts, even in his absence.
History
Despite looking human, Kengo is actually a Core Child, a construct of Cosmic Energy created by the Core Switch, one of many mysterious crystal-like Switches that the Presenters sent across the cosmos in search of sentient life who can reverse engineer it. The Core Switch ended up on the moon where it was found by OSTO scientists Rokuro Utahoshi and Mitsuaki Gamou, both respectively creating the Astroswitches that function with the Fourze Driver and the Zodiarts Switches that forcefully evolved humans. A day before Gamou betrays him, Rokuro witnesses the birth of Kengo. Later, guilty of helping Gamou destroy the lunar station and killing Rokuro and unware of the infant's true nature, Kuniteru Emoto found Kengo and brought him to Earth.
A year before the series started, Kengo received a letter and an Astroswitch from an anonymous person. The portal connecting to the Rabbit Hatch lunar base, which is all that remained of the OSTO complex, was opened in the locker in an abandoned club activity room when Kengo just so happened to throw the activated Switch inside. He discovered all about the Astro and Zodiarts Switches on the base and decided to follow through with his father's plans to fight the menace that is to come.
Kamen Rider × Kamen Rider Wizard & Fourze : Movie War Ultimatum
Five years later Kengo had followed in his father's footsteps by becoming a scientist, and was dedicated to contacting the Presenters in order to fulfill Rokuro and Gamou's dream. When he was approached by Gentaro, Kengo admitted his surprise that his friend was a teacher but also that he knew it would be the perfect job. He returned to Ama High in order to help Gentaro to stop Sanagiman and his followers, and when Gentaro chose to destroy the Fourze Driver in order to reach Saburo, Kengo accepted and understood his decision. Afterwards, as the rest of Kamen Rider Club lamented its destruction, Kengo was certain that as the Fourze Driver was Gentaro's friend it would always return when it was truly needed.
Game appearances
- Kamen Rider Travelers Record
Abilities
- Kengo is intelligent by manner unrelated to school work, having a vast amount knowledge of the Astro and Zodiarts Switches and the Powerdizer which is useful in battle. Unfortunately, Kengo alone is highly unsuited for combat due to his weak body which prevents him from using the Fourze System. To compensate, he uses the Foodroids and the Powerdizer to fight, but even then using the Powerdizer for a long period of time is an extremely difficult task for him due to the stamina needed to move. Because of his condition, the Fourze Driver was given to Gentaro and the Powerdizer to Shun Daimonji.
- During the situation Gentaro was poisoned and unable to fight, Kengo uses an unnamed temporary module which have the same ability as the Square Astroswitch Basement, suggested by Tomoko. It links up to the Fourze Driver and can allow him to use Astroswitches without transforming into Fourze, but he will suffers the great strain on his body. More recently, Kengo was able to nullify the power of all twelve Horoscopes Switches by awakening his powers thanks to him being the Core Child. As the Core Switch is gone, he doesn't have a weakened body anymore.
- Fourze Arsenal : The entirety of the Fourze arsenal technically belongs to Kengo, constantly developing the system his adopted father made which he is meant as the Core Child to present to the Presenters.
- Astroswitch Kaban : Many items in the Fourze arsenal are linked up to the Astroswitch Kaban. The Kaban serves as a wireless computer that allows analyses, communication and other functions.
- 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 specific Astroswitches.
Fourze Army Warlord
- Fourze Army Warlord
- Warlord : Kengo Utahoshi
- Type : Warlord Of Fourze Army
- Gender : Male
- Appearance : Kamen Rider × Kamen Rider Gaim & Wizard : The Fateful Sengoku Movie Battle
- Potrayer : Ryuki Takahashi
- The Fourze Army Warlord , who greatly resembles Kengo Utahoshi, is an ally to the Wizard Army who led Kamen Rider Bujin Fourze to battle against the Kiva Army. Like Kengo Utahoshi, he carries around a portable case computer and instructs Fourze on battle and attack strategies.
