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Icon-w.png This article is about a rider in Kamen Rider W.

"Now, enjoy your hell!"
―Katsumi's words after a battle[src]

Katsumi Daido (大道 克己, Daidō Katsumi) was a Necro-Over and a member of NEVER who became Kamen Rider Eternal (仮面ライダーエターナル, Kamen Raidā Etānaru), the main antagonist in Kamen Rider W Forever: A to Z/The Gaia Memories of Fate. He served as the viewpoint character in Kamen Rider W Returns: Eternal.

In Kamen Rider Zi-O, an alternate version of Katsumi was created by Another Decade, said copy somehow attaining the original Katsumi's memories.


Kamen Rider Eternal

Early Life

As shown in The Beginning of N/Blood and Dream, Katsumi was born with a congenital heart defect. This, combined with a fatal car accident, prompted his mother, Miki Daido, to use her NECRO-OVER project research, based on Philip, to save her son's life as the first Necro-Over, giving him bio-stimulants to age properly. However, despite Katsumi's superhuman combat skills, the Necro-Over project was rejected in favor of the Gaia Memory project, forcing Katsumi and his mother to leave the Foundation. Transforming four people who recently died into Necro-Overs, they founded NEVER. Daido is more refined and enhanced than the other Necro-Overs.

A to Z/The Gaia Memories of Fate

Attack on Futo

Katsumi was the leader of the organization NEVER that uses the T2 Gaia Memories. He lead the NEVER Dopants created from the T2 Gaia Memories. Katsumi and the other members of NEVER were fighting a terrorist organization in South Asia, where he encountered a Quark named Mina and fell in love with her. After a brief meeting with Jun Kazu, Katsumi gained the experimental Eternal Memory to become Kamen Rider Eternal. But when Doctor Prospect as the Eyes Dopant killed all of the Quarks, supposedly even Mina, Katsumi went mad and killed Prospect with Memory's Maximum Drive. With the Eternal Memory damaged, Katsumi discarded it and decided to wipe out the Museum.

Katsumi first appeared in Futo City attacking the helicopter Tabata is riding in, taking the T2 Eternal Memory and transforming into Eternal. He takes the entire case containing the T2 Gaia Memories and goes to his accomplices. But Tabata activates a switch causing the case and helicopter to explode, scattering the Memories. However, Katsumi survives, and he and his comrades search for the remaining Memories.

Encounter with Double

Katsumi then appears at the place the Riders of Futo came to meet Maria S. Cranberry, where he fights Kamen Rider Double as both FangJoker and CycloneJokerXtreme and easily overpowers both forms. He shuts down access to the pre-T2 Gaia Memories, saying that he and Philip are a lot alike, which only makes Philip more livid. After Double is defeated, NEVER claims the 19 T2 Gaia Memories that the Riders found.
With 25 of the 26 T2 Gaia Memories recovered and Philip captured by NEVER, Katsumi reveals his plan to take over and rebuild Futo City in his image, with the people turned into Necro-Overs. Reclaiming the T2 Joker Memory from Philip's partner, Shotaro Hidari, Daido initiates the X-Bicker that will send out a wave to turn everyone into Necro-Overs, despite knowing that they will die as they are not enhanced as Katsumi is. Philip, with help from Shotaro, reactivates their Gaia Memories, and Maria injects a serum into Daido that causes him to start dissolving. In retaliation, Daido shoots Maria in the stomach and takes another serum to stabilize himself which seemed to weaken him.

Final battle against Double and Death

They manages to catch up to Katsumi as he transforms into Eternal, but the latter escapes again. Double then catches up and fights Eternal on the Futo Tower using his Half Forms. As he is about to deliver the final blow as CycloneJokerXtreme, Eternal seemed to regain his full strength and goes into his Strengthening Armament mode, using the Zone Memory to summon the other T2 Gaia Memories. He then uses the 'Never Ending Hell Maximum Drive to send Double falling from Futo Tower to his death, but through the support of the citizens of Futo and a strong gust of wind blowing into the Xtreme Memory, Double changes from CycloneJokerXtreme to CycloneJokerGoldXtreme. Eternal then uses his energy to send one blast of energy at Double, but Double counters through the attack and hits Eternal with a kick strong enough to defeat him as well as destroy all 26 T2 Gaia Memories at once. With his very last breath, Katsumi remembers what death feels like.

Imagin Anime

Imagin in Wonderland

Kamen Rider Eternal and other characters of his respective movie are seen briefly in a poster at the entrances of toei's studio. Imagin in Wonderland

Type HIGH SPEED! The True Power! Type High Speed is Born!

Kamen Rider Eternal in Tevile-Kun

Kamen Rider Rider Eternal make a appearance with other Riders and kaijin monsters,when Shinnosuke and Kiriko discover the knock-off versions of the Televi-Kun ,an abandoned warehouse after they meet Roidmude 027.Type HIGH SPEED! The True Power! Type High Speed is Born!

Kamen Rider Ghost: Special Event


Kamen Rider Eternal is revived alongside other Dark Riders led by Shocker Rider No.3 by Shocker with the objective to hunt and destroy Kuroki the traitor. Eternal and the Dark Riders are seen torturing a traitorous Shocker Combatman. Kamen Rider Ghost then appears, with the Dark Riders focusing on him instead. When they seemed to have dominated Kamen Rider Ghost, he then transforms into Grateful Damashii, killing Eternal and Kamen Rider Orga at the same time by Omega Formation (Ryoma and Himiko).Kamen Rider Ghost: Special Event

Futo Tantei

Katsumi Daido with his organization NEVER as seen in Futo Tantei

Katsumi and his organization NEVER appears in Futo Tantei Chapter 77 Flashback.

Appearances in other media

Kamen Rider W Forever: From A to Z, 26 Rapid-Succession Roars of Laughter

The Crisis Called E/The Man That Stole Eternity

Kamen Rider Eternal's appearance in The Crisis Called E/The Man That Stole Eternity.

Kamen Rider Eternal is described by Shroud as the only rider who faced Double and Accel. Later, Shroud gives an exercise to Akiko Narumi to see how many ports for the Gaia Memories Kamen Rider Eternal had, Akiko accepts the exercise when he did he said they are 26, but failed when Shroud explained that she forgot a port and it is located in the personal weapon of Kamen Rider Eternal in Eternaledge, implying that they are 27 ports of Gaia Memories.The Crisis Called E/The Man That Stole Eternity

Video Game Appearances

Kamen Rider Battle Ganbaride

Kamen Rider Eternal and Strengthening Armament is a playable character with the other Heisei and Showa Kamen Riders in Kamen Rider Battle Ganbaride.

Masked Rider Expansion

Kamen Rider Eternal Masked Rider Expansion card

Kamen Rider Eternal appears as a playable character in this trading card game with other Kamen Rider Kamen Rider Heisei-Era, Showa-Era, Super Sentai, Metal Heroes, and other Heroes.

Kamen Rider Riderbout

Kamen Rider Eternal and his Strengthening Armament appears as a playable character with the other Heisei and Showa Kamen Riders in Kamen Rider Riderbout.

HEROES' VS ヒーローズバーサス

Eternal as seen in HEROES' VS ヒーローズバーサス

Kamen Rider Eternal appears as a playable character and boss in this crossover video game. Eternal can easily incorporate the short-range SP shock "Eternal Requiem Kick" during the combo, targeting high damage while absorbing SP from the opponent.

Kamen Rider Break Joker

Kamen Rider Eternal and his Strengthening Armament appears as a playable character with other Riders and monsters in Kamen Rider Break Joker.

Kamen Rider: Battride War series

Kamen Rider Battride War II

Eternal as seen in Kamen Rider: Battride War.

Katsumi Daido has been confirmed to appear in Kamen Rider Battride War II as Kamen Rider Eternal, with Mitsuru Matsuoka reprising his role. While Eternal appeared in the first Battride War game, this version was confirmed to be an entirely new, unidentified character using the Eternal Memory.

Kamen Rider Battride War Genesis

Kamen Rider Eternal in Battride War Genesis.

Eternal appears as a playable character in Kamen Rider Battride War Genesis, with Mitsuru Matsuoka reprising his role as Katsumi Daido. Instead of form changes, Eternal can use some of the T2 Gaia Memories to perform special attacks or to enhance his abilities; however, the Memories can't be used consecutively and require the player to wait for the hidden meter to regenerate in order to use another, yet can be filled to hasten the regeneration of the memory uses and make the used Gaia Memories useful again due to regenerating the memory's meter while waiting without being attacked is very slow and may waste time on completing the game's mission. As he was never given his own Rider Machine, Eternal's "fast travel" method instead involves using the T2 Accel Memory to run at super speeds. Eternal's super mode is Strengthening Armament, giving him the attacks he used in his final battle with Double.

  • Special Attacks: Combination Punch, Corkscrew Punch (T2 Unicorn Memory (Ground and Air separately), Blazing Uppercut (Aerial Rave Launcher), Blood Hell Blade (Helm Breaker Wave), Eternal Requime, Never-Ending Hell (change to Strengthening Armament)
  • T2 Gaia Memory Changes:
    • Eternal: Uses the Eternal Requiem Maximum Drive, stunning nearby enemies.
    • Heat: Surrounds Eternal with flames, increasing his attack power.
    • Metal: Surrounds Eternal with silver flames, increasing his defense and granting super armor.
    • Luna: Lets Eternal perform a "shadow clone" attack.
    • Trigger: Lets Eternal fire energy bullets from the Eternaledge. Rotatable
  • Special Attacks (Strengthening Armament): Bloody Hell Blade (Slash), Never-Ending Hell (Burst and Ball shots separately)

Kamen Rider Battle: Ganbarizing

Kamen Rider Eternal is a playabled character in Kamen Rider Battle: Ganbarizing, also use Strengthening Armament in the video game.

Kamen Rider Battle Rush

Katsumi Daido as Kamen Rider Eternal appears as a playable and support character in the video game Kamen Rider Battle Rush using Eternaledge.

Kamen Rider Batton-Line

Kamen Rider Eternal and his Strengthening Armament form appears as a playable character in Kamen Rider Batton-Line among other Riders in the game.

Kamen Rider Transcend Heroes

Kamen Rider Eternal and Strengthening Armament appears as a playable character with other Kamen Riders in the video game, performing his Eternal Requiem and Never-Ending Hell against his enemies in Kamen Rider Transcend Heroes.

Kamen Rider Buttobasoul

Kamen Rider Eternal Medal

Kamen Rider Eternal is a playable character in Kamen Rider Buttobasoul.

Battle Spirits

Kamen Rider Eternal Battle Spirits card

Katsumi Daido as Kamen Rider Eternal appears with other Kamen Riders and Monsters in Battle Spirits.

Kamen Rider City Wars

Kamen Rider Eternal as seen in city wars

Kamen Rider Eternal and Strengthening Armament is a playable character alongside the other Kamen Riders in Kamen Rider City Wars.

Kamen Rider: memory of heroez

Katsumi Daido/Kamen Rider Eternal appears as an opponent in KAMEN RIDER: memory of heroez. He is revived by ZEUS, the antagonist, along with several others to test the Core Power, with Eternal being the only one to be able to handle it. He fights Double and OOO in hopes of securing his future, but was ultimately defeated by them. He then disintegrates, leaving only his Gaia Memory for Double to get, who also mourns his death.


Originally, Katsumi was a gentle child with an affinity for music, as well as being very close to his mother. From his forced resurrection as a Necro-Over though, Katsumi's sense of empathy greatly declined, his mercenary training further corrupting him. However, some of Katsumi's former morality remained inside, to the point of sparing Mina's life in battle. Still capable of feeling sympathy, Katsumi would also attempt to save her and the others from Foundation X's experiments, disgusted at how they were treated.

Upon his failure to stop Doctor Prospect's cruel actions though, Katsumi forsook all morality, becoming a vicious terrorist. Now driven by his anger and hatred, Katsumi plotted revenge on Museum and Foundation X, setting sights on Futo City. No longer caring what happened to his allies, Katsumi readily sacrificed them for his plans to succeed, to the point of killing Reika and Maria in cold blood.

Yet, despite his coldness, Katsumi still subconsciously yearned for companionship, expressing joy at the idea of Futo City's residents becoming monsters like him. Furthermore, when defeated by Shotaro and Philip, Katsumi fully embraced his death, seemingly glad that his forced life was finally over.

Kamen Rider Eternal

Red Flare

Kamen Rider Eternal Red Flare

"Eternal! (Energetic drumming)"
―Transformation announcement[src]
  • Height: 205 cm
  • Weight: 95 kg

Red Flare (レッドフレア, Reddo Furea) is Eternal's incomplete form. This form of Eternal was accessed by Jun Kazu, who could not access the full power of the Eternal Memory due to his poor compatibility with it. Unlike its Blue Flare version, it lacks the extra Memory Slots and Eternal Robe, and the flame designs on the arms and leg bands are red instead of blue. In W Returns, Katsumi briefly transforms into Red Flare before it evolves into Blue Flare due to his high compatibility.

This form is exclusive to Kamen Rider W Returns: Kamen Rider Eternal.

Blue Flare

Kamen Rider Eternal Blue Flare

Kamen Rider Eternal Blue Flare (Without Eternal Robe)

"Eternal! (Energetic drumming)"
―Transformation announcement[src]
  • Height: 205 cm
  • Weight: 95 kg

Ability Perimeters:

  • Punching Power: 7 t
  • Kicking Power: 12 t
  • Maximum Jump Height: 150 m
  • Maximum Running Speed: 100 m per 3 seconds

Through the Lostdriver and the Eternal Memory, Katsumi transforms into Kamen Rider Eternal. Eternal's Maximum Drive with the Eternaledge is the Eternal Requiem (エターナルレクイエム, Etānaru Rekuiemu), a power wave that renders the powers of all other Gaia Memories useless. Like most Riders in Kamen Rider W, Eternal has an English letter motif - in this case the letter 'E'. Katsumi originally transformed using the standard Eternal Memory, but eventually abandoned it in favor of the T2 version. Eternal is also adorned with a black Eternal Robe (エターナルローブ, Etānaru Rōbu) cape after transformation.

In this mode, he is able to execute the Eternal Requiem (エターナルレクイエム, Etānaru Rekuiemu) Maximum Drive utilizing the Eternaledge. In addition to the Maximum Slots on the Lostdriver and the Eternaledge, Eternal Blue Flare has a series of Maximum Slots on belts around his chest, right arm, and left leg, for a total of 26 for every T2 Gaia Memory.

This form is called Eternal's Blue Flare (ブルーフレア, Burū Furea) form, as revealed in Kamen Rider W Returns, which is more powerful than the incomplete Red Flare form.

Appearances: W Returns: Kamen Rider Eternal, A to Z/The Gaia Memories of Fate, Type HIGH SPEED! (only Image), Special Event.

Strengthening Armament

Strengthening Armament Mode

"Zone! Maximum Drive!"
―Transformation announcement[src]
  • Height: 205 cm
  • Weight: 97 kg

By filling all 26 of his Memory Slots through the T2 Zone Memory, Eternal enters his Strengthening Armament (強化武装, Kyōka Busō)[1] mode. This form is also called Strongest Form, and Gaia Memories Full Equipped Form[2].

In this mode, he is able to absorb the X-Bicker's energy to produce the Eternal Wave to execute the Never Ending Hell (ネバーエンディングヘル, Nebā Endingu Heru) Maximum Drive utilizing the Eternaledge. Moreover, he can also unleash a devastating rider kick boosted by the power of all 26 T2 Gaia Memories.

However, the Strengthening Armament is only usable in Blue Flare form.

Appearances: Kamen Rider W Forever: A to Z/The Gaia Memories of Fate, Imagin Anime Episode 24 (Image).




Legend Rider Devices

Eternal Medal

Eternal Medal (エターナルメダル, Etānaru Medaru): Based on Kamen Rider Eternal.

Eternal Ring

This Rider Ring which bears the likeness of Kamen Rider Eternal is exclusive to Kamen Rider Wizard's Wizard Ring toyline. When used by a Wizardriver wearer, it would be able to summon Kamen Rider Eternal.

"(Digital beeping) Eternal!"
―Activation announcement[src]

"To be announced"
―Secondary activation announcement[src]

"Rider Time! Eternal! Eternal!"
―Transformation announcement in the Ziku-Driver's right-hand slot[src]

"(Right-hand Ridewatch's announcement)! Armor Time! Eternal! Eternal!"
―Transformation announcement in the Ziku-Driver's left-hand slot[src]

"To be announced"
―Finisher announcement in left-hand slot[src]

Eternal Ridewatch (エターナルライドウォッチ, Etānaru Raidowotchi): Based on Kamen Rider Eternal Blue Flare, this Ridewatch provides access to the EternalArmor. It is dated 2009.


Behind the scenes


Katsumi Daido is portrayed by Mitsuru Matsuoka (松岡 充, Matsuoka Mitsuru) of SOPHIA, who also performed W and Cod-E ~E no Angō~, the theme songs of Kamen Rider W Forever: A to Z/The Gaia Memories of Fate and Kamen Rider W Returns: Kamen Rider Eternal respectively.[3] He would later perform the opening theme of Kamen Rider Drive, as well as voicing Kamen Rider 4 in D-Video Special: Kamen Rider 4.

As a teenager, he is portrayed by Masaki Suda (菅田 将暉, Suda Masaki), who also portrayed the lead role of Philip. As Kamen Rider Eternal, his suit actor is Jun Watanabe (渡辺 淳, Watanabe Jun).

Concept Art

Kamen Rider Eternal concept art


  • Katsumi had once addressed Philip as his "brother" since they were humans that revived from the dead. Ironically, as noted by his mother, Katsumi's appearances in his teenage years match that of Philip.
  • In the promotional poster of Kamen Rider Zi-O: Over Quartzer, Eternal among other Kamen Riders are seen in the background of the movie poster, despite not actually appearing.



See Also

Icon-w.png Kamen Rider W
Narumi Detective Office
Shotaro Hidari - Philip - Akiko Narumi - Sokichi Narumi† - Tokime
Memory Drivers
Doubledriver - Acceldriver - Lostdriver
Gaia Memory-related
Gaia Memories - Memory Gadgets - Fang Memory - Xtreme Memory - Trial Memory - Gaia Memory Enhancing Adapter
Metalshaft - Triggermagnum - Engineblade - Skullmagnum - Prismbicker - Eternaledge - Shroudmagnum
Revolgarry - Hardboilder - Gunner A - Diablossa - Skullboilder - Skullgarry - Hardmammother
The Futo Irregulars
Santachan - Watcherman- Queen & Elizabeth - Isamu Bito
Futo Police Department
Ryu Terui - Mikio Jinno - Shun Makura
Museum and the Dopants
Foundation X
The Sonozaki Family: Terror - Claydoll - Taboo/R Nasca - Nasca - Smilodon - Masquerade Dopants
Dopants: Magma Dopant - T-Rex Dopant - Money Dopant - Anomalocaris Dopant - Cockroach Dopant - Sweets Dopant - Virus Dopant - Violence Dopant - Arms Dopant - Bird Dopant - Ice Age Dopant - Triceratops Dopant - Liar Dopant - Puppeteer Dopant - Invisible Dopant - Nightmare Dopant - Beast Dopant - Zone Dopant - Yesterday Dopant - Quetzalcoatlus Dopant - Gene Dopant - Jewel Dopant - Old Dopant - Utopia Dopant - Energy Dopant
Movie Exclusive Villains: Dummy Dopant - Heat Dopant - Trigger Dopant - Metal Dopant - Luna Dopant - Cyclone Dopant - Bat Dopant - Spider Dopant - Kamen Rider Eternal - Commander Dopant - Eyes Dopant
Novel-Exclusive Villains (The One Who Continues After Z): Zoo Dopant - Zero Dopant - Queen Bee Dopant - Flower Dopant - Elephant Dopant - Dolphin Dopant - Salamander Dopant - Fish Dopant - Bird Dopant - Ape Dopant - Bee Dopants
Manga Exclusive Villains (Futo Tantei): Road Dopant - Aurora Dopant - Meganeura Dopant -Brachiosaurus Dopant - Scream Dopant - Alcohol Dopant - Puzzle Dopant - Reactor Dopant - Antlion Dopant - Owl Dopant - Trash Dopant - Caracal Dopant - Toadstool Dopant
Yukiji Bando - Kazuha - Hideo - Mamoru Nikaido - Sabu
Katsumi Daido - Maria S. Cranberry - Reika Hanehara - Kyosui Izumi - Gozo Domoto - Ken Ashiwara
Fuuto PI Chapters
1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41 - 42 - 43 - 44 - 45 - 46