This article is about a/an 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 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 and before the Summer Film, he was the main protagonist in Kamen Rider W Returns: Eternal.

Character History

Early Life

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 to attack Futo City.

In The Beginning of N/Blood and Dream, it is revealed that 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 proving to be a skilled fighter (especially with combat knives), the Necro-Over project was rejected in favor of the Gaia Memory project, so Katsumi and his mother left 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.

Attack on Futo

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.

In the film, Katsumi first appeared 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.

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 Phillip 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.

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.

Video Game Appearances

Kamen Rider Battride War II

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 must wait for the hidden meter regenerates in order to use another, yet can filled to fasten up the regeneration of the memory uses to make the used Gaia Memories useful again due to regenerating the memory's meter while waiting without being attacked is very slow and may wasting time on complete 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 Eternal Edge. Rotatable
  • Special Attacks (Strengthening Armament): Bloody Hell Blade (Slash), Never-Ending Hell (Burst and Ball shots separately)

Kamen Rider Eternal

Red Flare
KR-Eternal RedFlare

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 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

KR-Eternal without cape

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 tons
  • Kicking Power: 12 tons
  • Maximum Jump Height: 150 m
  • Maximum Running Speed: 100 m. per 3 sec

Through the Lost Driver and the Eternal Memory, Katsumi transforms into Kamen Rider Eternal. Eternal's Maximum Drive with the Eternal Edge is the Eternal Requiem (エターナルレクイエム Etānaru Rekuiemu), a power wave that cancels out all other Gaia Memories. 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 Eternal Edge. In addition to the Maximum Slots on the Lost Driver and the Eternal Edge, 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

Strengthening Armament
Eternal Strongest Form

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 Eternal Edge.

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

This form is exclusive to Kamen Rider W Forever: A to Z/The Gaia Memories of Fate.


Legend Rider Devices

Eternal Medal

Eternal Medal

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

Better Ring of Eternity

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).


  • Despite being stated that clear looking Gaia Memories are normally weaker than normal Gaia Memories, Eternal has proven itself to be strong enough to easily defeat even Double as CycloneJokerXtreme.
  • Since Eternal has not only defeated Double as CycloneJokerXtreme twice but also sliced through the Futo Tower, that may mean he is the second strongest W Rider aside from Double as CycloneJokerGoldXtreme.
  • 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 matches that of Philip.



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