Build

E1 · 25 min

Best Match Guys

Sento 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...

E2 · 25 min

The Innocent Runaway

The 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.

E3 · 25 min

Borderline of Justice

The 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...

E4 · 25 min

Evidence Becomes Zero

The 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.

E5 · 25 min

Dangerous Identity

Sento confronts Owner on his involvement with Faust. Sawa finds a lead on Sento's elusive past.

E6 · 25 min

Furious Moonsault

Ryuga finds the entrance to Faust's hidden base. Aiming to learn more, Sento learns of the late Katsuragi's research into "Nebula Gas".

E7 · 25 min

The Demon Scientist

Sento 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...

E8 · 25 min

Memory Starts Talking

Now hidden in Hokuto, Sento and Ryuga try to learn more about Takumi Katsuragi from his mother, and find his hidden project data.

E9 · 25 min

Project Build's Trap

A 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.

E10 · 25 min

Destructive Technology

As the three Prime Ministers of Japan meet, Blood Stark leads an attack on the Touto Institute of Advanced Matter Physics.

E11 · 25 min

Burn Up, Dragon

With 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.

E12 · 25 min

Conspiracy Theory

Sawa reveals a connection between Faust, Nanba Heavy Industries, and the Touto Government. Sento and Ryuga plan to recover Pandora's Box.

E13 · 25 min

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...

E14 · 25 min

The Fake Kamen Rider

Blood Stark's identity is revealed, and Sento races against time to finish a counter-measure against him.

E15 · 25 min

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.

E16 · 25 min

Weapon Hero

Gentoku reveals the truth behind Sento's missing memories, and the reality may tear his and Ryuga's friendship apart.

E17 · 25 min

Rider Wars Begin

Hokuto 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.

E18 · 25 min

The Golden Soldier

A new contender in the Rider Wars appears before Sento and Ryuga, somehow weilding his own Sclash Driver. Hokuto's own Rider, Grease, has arrived.

E19 · 25 min

Forbidden Item

Another 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...

E20 · 25 min

The Devil's Trigger

Soichi 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.

E21 · 25 min

Unstoppable Hazard

In 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?

E22 · 25 min

Tearful Victory

Touto 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!

E23 · 25 min

Phantom of the West

Seito 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.

E24 · 25 min

The Man Called Rogue

Kamen Rider Rogue has revealed himself; Misora collapses inside the base.

E25 · 25 min

Idol Awakening

Misora sends Kamen Rider Rogue flying through Skywall; Souichi reveals to Sento that there is a spy in the Touto government.

E26 · 25 min

Death Match of Betrayal

Seito 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.

E27 · 25 min

Counterattacking Hero

Ryuuga is tricked into losing his match; Build and Rogue face off as Sawa arrives with the schematics stolen from Sento.

E28 · 25 min

The Genius Shows Up in a Tank

Kamen 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.

E29 · 25 min

Bells Ring on Curtain's Rise

Despite 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...

E30 · 25 min

The Truth of Pandora's Box

Blood Stark wonders how the Queen of Mars is still alive. Mysteries begin to arise as she singles Ryuuga out to become hope.

E31 · 25 min

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.

E32 · 25 min

Programmed Tragedy

Ryuuga learns of his alien origins; Nanba takes Kazumi's friends hostage in exchange for Pandora's Box.

E33 · 25 min

The Final Weapon, Evol

Souichi holds the Touto Prime Minister hostage in exchange for Sento to give him the Evol Driver.

E34 · 25 min

The Separated Best Match

Sento is poisoned by Evolt, who then negotiates a deal with Ryuuga for the cure.

E35 · 25 min

Tower of Destruction

Evolt 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.

E36 · 25 min

Evolt Hunts the Planet

Pandora'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.

E37 · 25 min

The Ultimate Phase

In 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.

E38 · 25 min

Mad World

Sento has now lost all his memories and reverted to Takumi Katsuragi; Evolt gives Utsumi and the rest of Nanba an ultimatum.

E39 · 25 min

Unstoppable Genius

Utsumi 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.

E40 · 25 min

Final Revolution

Kazumi 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.

E41 · 25 min

The Truth of Best Match

Sento 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.

E42 · 25 min

Suspicious Legacy

Sento 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.

E43 · 25 min

Another Build

Sento's loyalties are questioned concerning his father; Misora makes a deal with Evolt.

E44 · 25 min

The End of Evolt

Kazumi and Gentoku get caught in order to raise their hazard level; Sento builds Ryuuga a new power-up.

E45 · 25 min

The Scientist of Hope

It 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.

E46 · 25 min

Vow to Be the One

Evolt 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.

E47 · 25 min

Zero Degree Flames

Kazumi 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.

E48 · 25 min

To a World of Love & Peace

With Kazumi now gone, it's time for the final confrontation with Evolt.

E49 · 25 min

A Future Built by Build

Ryuuga has flown away with Evolt. Sento decides to go bring him back as the two worlds are about to merge.