
Ten thousand years ago, fifty-two demons—the Undead—partook in a Battle Royal to decide which species would inherit the Earth. The winner was the Human Undead, and thus dominion of the Earth was given to Humanity.
In the present day, archeologists discovered the sealed Undead, and accidentally released them. To counter this threat, the Board Of Archaeological Research Department–BOARD–equips two young men with the Rider System. As a new Battle Royal begins, who will emerge the victor?
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Episode 1
The Indigo Warrior
Whilst investigating the urban legends of the Undead, Kotaro Shirai stumbles upon the two Kamen Riders of BOARD.
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Episode 2
The Mysterious Rider
BOARD is in pieces. Left reeling by Tachibana's betrayal, Kenzaki is forced to respond to another Undead attack.
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Episode 3
Their Secret…
Hirose manages to get access to Chief Karasuma's hard drive. While they search to find him, another Undead attack brings Tachibana back to the frontlines.
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Episode 4
Immortality’s Mysteries
Tachibana reveals the truth behind the BOARD attack, and warns Kenzaki that the Rider System will destroy his body.
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Episode 5
The Challenge to the Past
Hearing an urban legend about a cave where you can hear the voices of the dead, Amane drags Kotaro and Kenzaki along. However, the Centipede Undead attacks...
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Episode 6
Chalice’s True Identity
Kenzaki discovers the link between Amane and Chalice. An enigmatic man appears with the goal of capturing the Rider System users.
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Episode 7
The Trapped Two
Kenzaki is captured by the mysterious Isaka, but Tachibana manages to escape the attack. He enlists help from Shiori and Kotaro to search for Kenzaki.
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Episode 8
The Revived People
Kenzaki and Karasuma carry an injured Tachibana as they narrowly escape Isaka’s facility. Karasuma reveals the truth about Isaka and his organization.
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Episode 9
A Fighter’s Destiny
While Tachibana questions his ability to become Garren and fight the Undead, Hajime struggles to understand his humanity.
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Episode 10
The Manipulated Warrior
Tachibana's "sickness" is cured and he is able to transform into Garren once again, but at what cost? Hajime questions Jin on human emotions.
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Episode 11
The Whereabouts of Each
While fighting Ikasa, the Peacock Undead, Blade is attacked by an unlikely opponent - Garren. Meanwhile with no place else to go, Hajime stays with Jin, but an Undead appears.
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Episode 12
Category Ace
It's Blade vs Garren as the Spider Undead—a more powerful, Category Ace Undead—appears. A worried Sayoko investigates the cause of the changes in Tachibana’s body.
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Episode 13
The Golden-Threaded Trap
Isaka's plans are in motion, as he seeks those marked by the Spider Undead - those with the potential to become his perfect Rider.
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Episode 14
Ace Sealed!
As the race to seal the Category Ace continues, Ikasa sets his sights on the one thing that could interfere with Garren.
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Episode 15
Fate’s Conformer
The Dragonfly Undead kidnaps Amane and her mother, intending to lure Hajime into a trap. Isaka's Rider System is complete, and all that remains is finding a compatible host.
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Episode 16
Leangle’s Power
Tachibana retires as Garren, after his involvement in the creation of Isaka's Rider System. That night, the Leangle belt goes missing.
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Episode 17
The Evil Belt
Leangle has found a host, and within minutes reveals a dangerous new ability. Who has succumbed to the power of the evil belt?
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Episode 18
Spirits That Manipulate Darkness
Leangle attacks and overwhelms Kenzaki while Kiryu from BOARD reprimands Tachibana for leaving the battle.
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Episode 19
The One Who Conquers Darkness
Kiryu steals the Leangle buckle and transforms. Drunk with power, he attacks. His fate and Mutsuki’s are now twisted due to their newfound obsession.
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Episode 20
The Target is Kotaro
Something sinister grows within Mutsuki after he recovers the Leangle belt. Kotaro, still distrustful of Hajime, becomes entangled in an Undead plot.
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Episode 21
Battles That Feel for Friends
Tachibana and Mutsuki arrive as Chalice seals the Undead. As Chalice fights Garren, Leangle takes control of Mutsuki again, but the fight ends quickly. After fighting the Capricorn Undead, Kenzaki…
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Episode 22
The Escape From Darkness
Tachibana continues to train Mutsuki to overcome the Spider Undead. A friend of the Kurihara family, Kamioka, takes Aikawa on a photo shoot. Garren and Leangle try to seal the…
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Episode 23
Who are You?
Mutsuki overcomes his fear and seals the Mole Undead. Kamioka begins questioning Aikawa's presence at the Kurihara house. The Eagle Undead kidnaps her to trap Aikawa and steals his Change…
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Episode 24
Mysterious Hunters
The Wolf Undead is changing people into werewolves. While fighting them at an amusement park, Leangle meets a group of human Undead Hunters. Leangle, Blade, and Garren encounter the Wolf,…
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Episode 25
A Traitor’s Sprint
The Wolf Undead steals Black Fang as Garren and Blade try to retrieve it. Chalice chases after the Orchid Undead, but Shirai finds her and heals her wound. Kenzaki and…
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Episode 26
The Power Which Moves Me
The Elephant Undead arrives and defeats Blade and Garren. A strange man, Noboru Shima, shows up at Shirai's house with news from Karasuma. The Spider Undead begins to regain control…
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Episode 27
The Trembling Heart…
Mutsuki begins to falls under the control of the Spider Undead again. The Buffalo Undead appears and Garren and Blade rush to seal it. Shima confronts Leangle about releasing Mutsuki,…
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Episode 28
A Dangerous Gamble!?
Leangle fights Shima, but Blade arrives to stop them. While Shima and the others think of a plan, Mutsuki continues to struggle against the Spider Undead. While trying to find…
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Episode 29
The Two Chalices
Azumi, the Serpent Undead, finds Aikawa and fights him with the help of the Tortoise Undead. Garren and Blade show up to help as Chalice staggers away. Having lost his…
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Episode 30
Lost Memories
The Serpent Undead continues to search for Aikawa. Mikami learns about Aikawa's identity, and tries to get his life back. Mikami's girlfriend, Michi, learns the truth about Mikami and Aikawa,…
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Episode 31
The 53rd Being
While terrorizing people, Leangle is photographed by King, the Caucasus Undead in human guise. Kenzaki asks Aikawa to join them, but Tachibana does not trust him. King creates a website…
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Episode 32
The Destroyer’s Secret
Garren arrives to assist Blade and drives off the new Undead. Tachibana tells everyone about Aikawa's identity as the Joker Undead. Meanwhile, King holds Aikawa and forces him to transform…
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Episode 33
The Targeted Kenzaki
Blade and Garren fight over what should be done about Aikawa. Hirose's father contacts Tachibana and shows him the Trials. The Kenzaki encounters King and learns that Aikawa needs his…
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Episode 34
Category King
Kenzaki realised what was Trial D's motive. He decided to leave town to avoid further harm to other people. Mutsuki battled Hajime into a battle but was attacked by his…
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Episode 35
A Dangerous Transformation!?
Another Trial Undead is hot on Kenzaki's trail, he can also use Kenzaki's moves! Meanwhile, Hajime can no longer control himself and fights assuming his Joker form.
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Episode 36
Strongest Form
Hajime has been taken over by his Joker form. No longer in control of himself, he cannot see the differences from humans and Undead and it's Kenzaki's King form to…
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Episode 37
Towards a New Destiny
In order to get back Hajime from his Joker form, Kenzaki asks Mutsuki to give him the 5 cards of the Chalice deck that are in Mutsuki's hands, but for…
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Episode 38
One Who Takes Hold of Destiny
Hajime's problem was solved as he can turn back into a human, but the new problem is on Kenzaki as he and Mutsuki have been tricked by Hirose to fight…
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Episode 39
Reunion…Father and Daughter
Yoshido captures Mutsuki to create a new trial named Trial G, based on his Rider data. Meanwhile, Blade was followed by a new Trial, without knowing that it is Yoshito…
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Episode 40
Parting With the Past
Hirose uses herself as bait to meet Yoshito (Trial B) so that the Riders can destroy him. Unfortunately, Trial G interfered and they have to stop him before it targets…
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Episode 41
A Desire to Get Stronger
Mutsuki wishes that he will be the strongest Rider by fighting against the Tiger Undead but loses instead. But while confronting the Giraffa Undead, the Tiger Undead learns the truth…
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Episode 42
Leangle Revives
After being poisoned by the venom of the Scorpion Undead, one of the two Undead fused into the Titan. Mutsuki attacks his friends and turns into the Category Ace. Everyone…
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Episode 43
Foe or Friend?
Using the abilities of the Chameleon Undead, the Titan tricks the Riders into fighting each other.
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Episode 44
Four of a Kind
All the Riders get together to fight the Titan, and Blade's King form finds a new attack combo, the Four Card.
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Episode 45
The New Card
New Undead are born, and its identified as a fifth ace Keroberos, now all 4 Riders must face this powerful new Undead.
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Episode 46
The Ruler’s Seal
Though Keroberos was sealed, Tennoji reveals his true plan as he fuses with the sealed Undead to become all powerful. However, once Tennoji is defeated, the Giraffa Undead murders him…
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Episode 47
Garren Eliminated
There are only two Undead left and if it's up to Garren, the Joker goes first, but in the heat of battle, will he change his mind or die trying?
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Episode 48
Prologue to Destruction
With Garren out of the game and Hajime declared the winner, Blade and Leangle are the world's last hope, to seal the Joker. However, they have to deal with the…
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Episode 49
The Eternal Trump
Kenzaki confronts Hajime in an all out battle with the human race's existence on the line. But can Blade manage to save the world on his own or does the…