Kamen RiderBuild

10 years after the Pandora's Box disaster divided Japan into three separate nations, unidentified lifeforms called 'SMASH' have appeared.

To fight them, a prodigy physicist with no memory utilises the Full Bottles to transform himself. This man is Sento Kiryu, Kamen Rider Build.

Where to Watch Kamen Rider • Build

49 Episodes

Best Match Guys
A1
Best Match GuysSento Kiryu starts his new job at the Touto Institute of Advanced Matter Physics, researching the mysterious Pandora's Box. While responding to a potential Smash sighting, Sento comes across a wanted fugitive...
The Innocent Runaway
A2
The Innocent RunawayThe Kamen Rider of Touto is now a fugitive, due to his part in saving a convicted murderer - Ryuga Banjo. Kiryu begins to see similarities in the mysterious experiments both he and Ryuga were subjected to.
Borderline of Justice
A3
Borderline of JusticeThe investigation into Ryuga's kidnapping leads to a man named Nabeshima. But to get the answers he needs, Ryuga must cross the border to Seito...
Evidence Becomes Zero
A4
Evidence Becomes ZeroThe mysteries of the past continue to pile up as Sento investigates the Pandora's Box disaster. In Seito, Ryuga and Sawa continues the search for Nabeshima's family.
Dangerous Identity
A5
Dangerous IdentitySento confronts Owner on his involvement with Faust. Sawa finds a lead on Sento's elusive past.
Furious Moonsault
A6
Furious MoonsaultRyuga finds the entrance to Faust's hidden base. Aiming to learn more, Sento learns of the late Katsuragi's research into "Nebula Gas".
The Demon Scientist
A7
The Demon ScientistSento and Ryuga need to learn more about Katsuragi and his research. Setting their sights on Hokuto, they first have to get through the Sky Wall...
Memory Starts Talking
A8
Memory Starts TalkingNow hidden in Hokuto, Sento and Ryuga try to learn more about Takumi Katsuragi from his mother, and find his hidden project data.
Project Build's Trap
A9
Project Build's TrapA debate about the nature of Katsuragi's research leads to another falling out between Sento and Ryuga. Under pressure from a backer, Faust hatches a plan to steal Pandora's Box.
Destructive Technology
A10
Destructive TechnologyAs the three Prime Ministers of Japan meet, Blood Stark leads an attack on the Touto Institute of Advanced Matter Physics.
Burn Up, Dragon
A11
Burn Up, DragonWith the majority of his Full Bottles now in Night Rogue's possession, Sento reveals his trump card - a way for Ryuga to use the Build Driver.
Conspiracy Theory
A12
Conspiracy TheorySawa reveals a connection between Faust, Nanba Heavy Industries, and the Touto Government. Sento and Ryuga plan to recover Pandora's Box.
Who Will Remove the Veil?
A13
Who Will Remove the Veil?A surprise call from Nabeshima lays the foundation for Sento's plan to reclaim Pandora's Box, and a chance to capture the elusive Blood Stark...
The Fake Kamen Rider
A14
The Fake Kamen RiderBlood Stark's identity is revealed, and Sento races against time to finish a counter-measure against him.
Judgment on Sento Kiryuu!
A15
Judgment on Sento Kiryuu!With Pandora's Box safely in their possession, Sento and Ryuga go after Gentoku, set on revealing the link between Touto's government and Faust to the public.
Weapon Hero
A16
Weapon HeroGentoku reveals the truth behind Sento's missing memories, and the reality may tear his and Ryuga's friendship apart.
Rider Wars Begin
A17
Rider Wars BeginHokuto invades Touto, looking to claim Pandora's Box for themselves. As civilian casualty numbers raise, Gentoku's government instigates Kamen Rider as their military weapon.
The Golden Soldier
A18
The Golden SoldierA new contender in the Rider Wars appears before Sento and Ryuga, somehow weilding his own Sclash Driver. Hokuto's own Rider, Grease, has arrived.
Forbidden Item
A19
Forbidden ItemAnother clash between the Touto and Hokuto Riders ends with Ryuga struggling from the Sclash Driver's effects. The Hokuto Crows are given a way to power up by Blood Stark, but there's a cost...
The Devil's Trigger
A20
The Devil's TriggerSoichi gives Sento the means the stop Ryuga's growing rage with the forbidden item - the Devil's Trigger. Gentoku plots a counter-attack against Hokuto's invaders.
Unstoppable Hazard
A21
Unstoppable HazardIn order to counter Ryuga's rampage as Cross-Z Charge, Sento is forced to use the Hazard Trigger. What is the cost of using this forbidden item?
Tearful Victory
A22
Tearful VictoryTouto and Hokuto's governments have ordered a winner-takes-all battle to decide who keeps Pandora's Box. It's Build vs Grease to decide the victor of the Rider War!
Phantom of the West
A23
Phantom of the WestSeito delivers an ultimatum to Kazumi - fight for them as their Kamen Rider or witness the death of his family. A mysterious new adversary makes his way to Touto to confront Sento and Ryuga.
The Man Called Rogue
A24
The Man Called RogueKamen Rider Rogue has revealed himself; Misora collapses inside the base.
Idol Awakening
A25
Idol AwakeningMisora sends Kamen Rider Rogue flying through Skywall; Souichi reveals to Sento that there is a spy in the Touto government.
Death Match of Betrayal
A26
Death Match of BetrayalSeito challenges Touto to a best-of-three battle to decide who keeps Pandora's Box; Sento works to find a counter to Black Hazard's berserk state.
Counterattacking Hero
A27
Counterattacking HeroRyuuga is tricked into losing his match; Build and Rogue face off as Sawa arrives with the schematics stolen from Sento.
The Genius Shows Up in a Tank
A28
The Genius Shows Up in a TankKamen Rider Rogue receives the data on Build's Rabbit Rabbit form, forcing Sento to unleash Tank Tank form; Sawa's backstory is revealed while Kazumi rescues civilians; Nanba decides to not play fair, taking control of Seito and declaring war.
Bells Ring on Curtain's Rise
A29
Bells Ring on Curtain's RiseDespite their promises, Seito continues their assault against Touto. All this is made worse as Blood Stark completes a panel of Pandora's Box, and the Skywall begins to shift...
The Truth of Pandora's Box
A30
The Truth of Pandora's BoxBlood Stark wonders how the Queen of Mars is still alive. Mysteries begin to arise as she singles Ryuuga out to become hope.
Overflow, Magma!
A31
Overflow, Magma!Sawa and Misora discuss what the story behind Ryuuga really is; Team Build raid Pandora's Tower in an attempt to reclaim Pandora's Box, but Blood Stark stays one step ahead, goading Ryuuga into action.
Programmed Tragedy
A32
Programmed TragedyRyuuga learns of his alien origins; Nanba takes Kazumi's friends hostage in exchange for Pandora's Box.
The Final Weapon, Evol
A33
The Final Weapon, EvolSouichi holds the Touto Prime Minister hostage in exchange for Sento to give him the Evol Driver.
The Separated Best Match
A34
The Separated Best MatchSento is poisoned by Evolt, who then negotiates a deal with Ryuuga for the cure.
Tower of Destruction
A35
Tower of DestructionEvolt is now in possession of Ryuuga's body and goes after Pandora's Box. Sento reaches out to Gentoku, who has the last of the bottles.
Evolt Hunts the Planet
A36
Evolt Hunts the PlanetPandora's Tower is complete and Evolt stands ready to destroy Earth. Kazumi is still angry with Gentoku for killing his friend and challenges him to a fight; Sento works on a way to harness Pandora's Box into a power-up for Build.
The Ultimate Phase
A37
The Ultimate PhaseIn order to keep Evolt from getting Pandora's Box, Bernage moves the entire cafe to a different location; Ryuuga can no longer transform and so he and Kazumi go to Gentoku for help in saving Sento.
Mad World
A38
Mad WorldSento has now lost all his memories and reverted to Takumi Katsuragi; Evolt gives Utsumi and the rest of Nanba an ultimatum.
Unstoppable Genius
A39
Unstoppable GeniusUtsumi has now taken on the role of Kamen Rider Mad Rogue; Takumi creates a new bottle to fight Evolt, but also plans to take out Ryuuga as well.
Final Revolution
A40
Final RevolutionKazumi is bummed that Evolt has stolen the bottles of his lost friends. Sento travels to his mother's house in Hokuto for answers about his father, but he and Kazumi end up face to face with a new Smash.
The Truth of Best Match
A41
The Truth of Best MatchSento learns that his father actually is alive; Sawa goes to find the one Faust experiment that, to their knowledge, has no relation to the Kamen Riders; Misora discovers that the Best Matches are about her.
Suspicious Legacy
A42
Suspicious LegacySento suspects that since Evolt has the Lost Bottles, he also has his father; Evolt plans to reunite Japan while Gentoku mopes over his dead father.
Another Build
A43
Another BuildSento's loyalties are questioned concerning his father; Misora makes a deal with Evolt.
The End of Evolt
A44
The End of EvoltKazumi and Gentoku get caught in order to raise their hazard level; Sento builds Ryuuga a new power-up.
The Scientist of Hope
A45
The Scientist of HopeIt turns out that Evolt is still alive, but Sento's father is able to tell him about a secret white panel in Pandora's Box.
Vow to Be the One
A46
Vow to Be the OneEvolt reveals himself to the world; Sento plans to combine their world with a parallel world via the white panel; Kazumi asks for a new power up.
Zero Degree Flames
A47
Zero Degree FlamesKazumi uses his new weapon to battle the clones of his former friends; Gentoku does battle with another set of clones and gets help from an unlikely ally.
To a World of Love & Peace
A48
To a World of Love & PeaceWith Kazumi now gone, it's time for the final confrontation with Evolt.
A Future Built by Build
A49
A Future Built by BuildRyuuga has flown away with Evolt. Sento decides to go bring him back as the two worlds are about to merge.