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You want me... to count my sins...? Then, is it a sin... to love...?
~ Kazu's last words before his death.

Jun Kazu, the Utopia Dopant, is a researcher for Foundation X and a major antagonist in Kamen Rider W, serving as the main antagonist of W's final arc. He is also the secondary antagonist of the film Kamen Rider W Returns: Kamen Rider Eternal.

He was portrayed by Gong Teyu.

Biography[]

Kamen Rider W Returns: Kamen Rider Eternal[]

Kazu was experimented on by the Foundation X researcher Doctor Prospect to give him the psychic abilities of Quarks. He later became the Utopia Dopant to fight Katsumi Daido and was killed by him, but his body was preserved so he could be revived as a Necro-Over.

Kamen Rider Double[]

Kazu met with Ryubee Sonozaki to discuss Foundation X's funding of Museum when Ryubee tells him that with his daughter, their funding to the Museum would be worth it. He later gave a briefcase containing the T2 Gaia Memories to Tabata to take to the Foundation's headquarters.

After Saeko Sonozaki was defeated and left for dead by the Smilodon Dopant, Kazu saved her out of love and offered to help her overthrow her father. He then witnesses Saeko use the powers of the Level 3 R Nasca Dopant and learns about her sister's role in the way she was raised. It is only after Wakana evolves into ClayDoll Xtreme that Saeko accepts Kazu's advice.

After Ryubee's death, Kazu kidnapped a comatose Wakana from the burning Sonozaki Estate and brought her to a Foundation X research facility, where he begins looking to find a way to awaken her from her coma so he can use her to resume the Gaia Impact. During a confrontation with the Kamen Riders, Kazu reveals himself to be the Utopia Dopant and beats down all of them. After discovering that Wakana's consciousness is connected to Philip and that his anguish raises her compatibility with the ClayDoll Memory fused into her body, Kazu attacks everyone close to Philip to increase his anguish and awaken Wakana.

However, Saeko has a change of heart and betrays him to rescue Wakana, becoming the Taboo Dopant to hold Kazu off and give Wakana time to escape. However, Kazu's Utopia Dopant powers prove vastly superior to the Taboo Dopant and Kazu is able to overpower and kill Saeko. Kazu then captures Wakana again and hooks her up to a machine to convert her into data so he can place her in a satellite and use it to broadcast the Gaia Impact worldwide. However, Shotaro then shows up un-transformed and uses the Memory Gadgets to overpower the Utopia Dopant and save Wakana, as well as destroy the facility before the Gaia Impact can occur. The Utopia Dopant survives the destruction of the facility and, furious at Shotaro's interfence, goes to kill him. Philip then arrives and transforms with Shotaro into Kamen Rider Double CycloneJokerXtreme to take the Utopia Dopant on. The Utopia Dopant is ultimately defeated by Double with the Double Prism Xtreme Maximum Drive.

As he fades, Kazu tries in vain to activate the memory again, only for it to drop and shatter on a ground. He then asks if it was a crime to love before dissolving away.

Kamen Rider Zi-O[]

An A.R. World version of Utopia Dopant is among five villain leaders summoned by Swartz in the final battle, alongside EvoltGamedeusN-Daguva-Zeba and Sagittarius Zodiarts.

Forms[]

Gallery[]

Kamen Rider Eternal Red Flare[]

Navigation[]

           W TitleVillains

Museum/Sonozaki Family
Ryubee Sonozaki | Saeko Sonozaki | Wakana Sonozaki | Kirihiko Sudo | Mick | Shinkuro Isaka | Masquerade Dopants

Foundation X
Neon Ulsland | Jun Kazu | Tabata | Doctor Prospect | Lloyd | Shion

NEVER
Katsumi Daido | Jun Kazu | Maria S. Cranberry | Kyosui Izumi | Reika Hanehara | Ken Ashihara | Gozo Domoto

EXE
Shiro Endo | Energy

Street
Yukiji Bando | Kazuha Gojo | Hideo Chiba | Mamoru Nikaido | Hikaru Futami

Dopants
Magma Dopant | T-Rex Dopant | Money Dopant | Anomalocaris Dopant | Cockroach Dopant | Sweets Dopant | Virus Dopant | Violence Dopant | Masquerade Dopants | Arms Dopant | Bird Dopant | Ice Age Dopant | Triceratops Dopant | Liar Dopant | Dummy Dopant | Puppeteer Dopant | Invisible Dopant | Nightmare Dopant | Beast Dopant | Zone Dopant | Yesterday Dopant | Quetzalcoatlus Dopant | Hopper Dopant | Gene Dopant | Jewel Dopant | Old Dopant | Energy Dopant | Oyakodon Dopant | Bat Dopant | Spider Dopant | Commander Dopant | Death Dopant | Road Dopant

           Zi-O Logo Villains

Time Jackers
Swartz | Heure | Ora | Tid | Finis

Another Riders
Another Build | Another Ex-Aid | Another Fourze | Another Faiz | Another Wizard | Another OOO | Another Double | Another Den-O | Another Kuuga | Another Gaim | Another Ghost | Another Shinobi | Another Quiz | Another Ryuga | Another Kikai | Another Zi-O | Another Blade | Another Agito | Another Ryuki | Another Hibiki | Another Kiva | Another Kabuto | Another Den-O II | Another Drive | Another Decade | Another Zero-One | Another 1 | Another Diend

Oma Zi-O's Army
Oma Zi-O | Woz | Kasshin | Dai Mazines

Future Riders
White Woz | Kamen Rider Ginga

Legendary Riders
Masato Kusaka | Kaito Kumon | Tsukasa Kadoya | Hajime Aikawa | Daiki Kaito | Shun Kageyama | Katsumi Daido

Another World Riders
Kamen Rider G4 | Kamen Rider Fuma | Kamen Rider Dark Ghost | Kamen Rider Rey | Kamen Rider Eternal | Kamen Rider Woz | Kamen Rider Yuuki

Quartzer
Kamen Rider Barlckxs | Kagen | Jogen | Woz | Kasshin | Dai Mazines

Tid's Army
Masquerade Dopants | Waste Yummies | Stardust Ninja Dustards | Elementary Inves | Ghouls | Lost Number Roidmudes | Gamma Commandos | Guardians | Hard Guardians

Swartz's Army
Monsters: Strong Smash Hazard | Mashin Chaser | Elementary Inves | Orion Zodiarts | Shika Inves | Utopia Dopant | N-Daguva-Zeba | Sagittarius Zodiarts | Gamedeus | Kamen Rider Evol
Footsoldiers: Guardians | Masquerade Dopants | Elementary Inves | Lost Number Roidmudes | Ghouls | Gamma Commandos | Bugster Virus

Worms
Salis Worms | Gryllus Worm | Imposter Shun Kageyama

Others
Waste Yummies | Gamma Commandos | Humanoise | Mole Imagin | Narutaki

Rider Time Shinobi
Rainbow Serpent
Yaminin | Stardust Ninja Dustards

Rider Time Ryuki
Tatsuya Kano | Takeshi Asakura | Jun Shibaura | Dark Shinji | Ishihashi | Tozuka | Kamen Rider Odin

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