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Icon-fourzeThis article is about a Rider in Kamen Rider Fourze.

Kaizo Jingu (神宮 海蔵, Jingū Kaizō), more commonly known as JK (JKジェイク, Jeiku, pronounced as Jake), is a supporting character in Kamen Rider Fourze. He is a first year student at Amanogawa High School within the gyaru crowd who is the third member to join the Kamen Rider Club.


Prior to coming to AGHS, JK was originally friends with Tojiro Goto and they formed a music duo known as Gene God in junior high in order to fulfill JK's dream. However they separated when they were ridiculed by their peers by their lackluster talent.

On Gentaro's first day, JK gives Gentaro information about the school until running away from Shun Daimonji. During the Queen's Festival, JK learns Gentaro's identity of Kamen Rider Fourze but agrees to keep his mouth shut about it since he wants no trouble. However, being targeted by Fumihiro Nitta, a student he wronged, and seeing the power of the Astro Switches in action personally, JK arranges the theft of the Elek Switch from Gentaro. But the attempt to use the Elek Switch to save his life goes array as JK is held captive by Nitta who allows him to call for help. Though none of his associates come to his aid, Gentaro and the others arrive to save JK. After he learns what friendship really means, JK is made a member of the Kamen Rider Club.

In his second year in AGHS, JK creates the alias of DJ Gene to set up an internet radio show DJ Gene Milky Night Carnival. Although he originally creates the show as a way to live his dream in secret, JK's show becomes far more popular than intended. Soon after, JK is reunited with Goto and becomes conflicted upon learning that his former friend is with the Horoscopes yet has the ability to improve his singing voice. Furthermore, JK is mortified to find Goto brainwashing his listeners into pumped up crazy fans, yet he still wants to live his dream while considering to quit the Kamen Rider Club due to his new-found understanding on the frailty of friendship. Though initially intended to close his show for good after the revelation, he is convinced that he does not want to end up like his father who gave up his dream even leaving the club. However, after seeing Gentaro stopping the Capricorn Zodiarts' music with his father's song, and being forgiven for his role in his former friend's scheme, JK ends his broadcast and dream with the intent to cherish the friendships he has with the Kamen Rider Club.


Heisei Generations FINAL[]

In late 2018, while Kengo oversaw Yuki Jojima's mission into space from mission control in Russia, JK met with Ohsugi at Amanogawa High School as the Enigma device caused the world to be merged with the World of Build. JK soon discovered that Foundation X, represented by the scientist Kaisei Mogami, had a hand in the crisis, which would be resolved within the next day by several Kamen Riders including Fourze. [Kamen Rider Heisei Generations Final: Build & Ex-Aid with Legend Riders]

Movie War Ultimatum[]

Kamen Rider Zi-O[]

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

Other appearances[]

Kamen Rider Travelers Record[]

JK appears in the video game Kamen Rider Travelers Record.

Final Stage[]

Elek State (JK)

JK returns in Final Stage and transformed into Fourze Elek State. [Kamen Rider Fourze: Final Stage]


JK acts as an informant to the students of his school who trades secrets for favors. However, he is known to be a coward as he constantly flees from difficult situations and at times uses people in elaborate schemes to get out of these situations. After being helped by Gentaro Kisaragi from the Unicorn Zodiarts, JK becomes more subornative and joins the Kamen Rider Club. This becomes much more detailed when his old band-mate, Tojiro Goto had become the Capricorn Zodiarts and JK remembering the fragility of friendship, leaving the Kamen Rider Club for a while.

His dream is to become a rock musician like his father, Keizo Jingu, which he had since he was a child, forming a band in middle school and forming an internet radio show in AGHS.

Kamen Rider Fourze[]



"Elek On! (Electricity crackle, followed by high-energy techno music)"
―Transformation announcement[src]
Rider Statistics
  • Height: 200 cm.
  • Weight: 97 kg.
Ability Parameters
  • Punching Power: 2.1 t.
  • Kicking Power: 6.3 t.
  • Maximum Jump Height: 20 m.
  • Maximum Running Speed: 100 m. per 5.8 sec.

Elekstates (エレキステイツ, Ereki Suteitsu) is Kamen Rider Fourze's golden form accessed by the powers of the Elek Switch. In Elekstates, Fourze is able to control electricity and use the Billy the Rod. Elekstates' offensive powers are similar to Basestates, but it has greater speed and defense.

This form is exclusive to Kamen Rider Fourze: Final Stage.




  • Billy the Rod - Fourze's sword-like weapon that is used in Elekstates through the Elek Switch


  • Powerdizer - An independent support vehicle to assist Fourze

Behind the Scenes[]


JK is portrayed by Shion Tsuchiya (土屋 シオン, Tsuchiya Shion), who previously made a cameo as a student in episode 15 of Kamen Rider Hibiki. As a child, JK is portrayed by Wataru Sekine (関根 航, Sekine Wataru). As noted in an interview with Shion and Sota Fukushi, who plays Gentaro, in Figure-Oh issue 170, Shion Tsuchiya is a big fan of the Kamen Rider Series, particularly liking Riderman.


JK is named after Keisuke Jin (神 敬介, Jin Keisuke) (Kamen Rider X); "J.K." are Keisuke's initials, as well as the initials of JK's real name. His given name Kaizo is also a reference, due to the fact that Jin was a 'Kaizorg' (カイゾーグ, Kaizōgu). This homage is alluded to in Fourze's Movie War Mega Max portion, Kamen Rider Fourze: Nadeshiko, Descend, where JK wears a makeshift X-Rider costume as part of the Kamen Rider Club's Seven Legendary Riders cosplay.


External links[]


Icon-fourze Kamen Rider Fourze
Kamen Riders
Main Riders: Gentaro Kisaragi - Ryusei Sakuta
Movie/Novel-exclusive: Nadeshiko Misaki - Tsubasa
Stageshow-exclusive: Kaizo Jingu - Tomoko Nozama - Shun Daimonji - Miu Kazashiro
Debatable Riders: Kouhei Hayami - Rider Hunter Boot
Transformation Devices
Fourze Driver - Meteor Driver- Nadeshiko Driver
Astroswitches - Astroswitch Case - NS-MagPhone
Astroswitch-related Weapons
Fourze Modules - Billy the Rod - Hee-Hackgun - Barizun Sword - Meteor Galaxy - Meteor Storm Shaft
Machine Massigler - Machine Meteorstar - Powerdizer
Kamen Rider Club: Yuki Jojima - Kengo Utahoshi - Miu Kazashiro - Shun Daimonji - Tomoko Nozama - JK - Chuta Ohsugi - Ran Kuroki - Haru Kusao - Saburo Kazeta - Rumi Komaki - Daita Kondou - Chikao Nezu - Miyoko Ohki
Ishinomori Characters: Inazuman - XVII - Skydain - Groundain - Black Knight - Inga Blink
Legend Riders: Momotaros - Urataros - Kintaros - Ryutaros - Tsukasa Kadoya - Daiki Kaito - Philip - Shotaro Hidari - Ryu Terui - Eiji Hino - Akira Date - Shintaro Goto - Haruto Soma- Kouta Kazuraba - Takeru Tenkuji - Emu Hojo - Sento Kiryu - Ryuga Banjo - Sougo Tokiwa - Geiz Myokoin
Others: Naomi - Owner - Ankh - Hina Izumi - Tsukuyomi
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
Others: Stardust Ninja Dustards
Foundation X
Lem Kannagi - Katal - Solaris - Controller Kiima - Suddendath Beta
Xatan - Eel - Gahra