"We were born from darkness, and taint everything with it. Ultra Brothers, this time I will surely destroy your light!"

―Yapool, Ultraman Mebius & the Ultra Brothers

Yapool (ヤプール Yapūru) is an evil entity and the main antagonist from Ultraman Ace. He has been defeated many times but proves to be immortal because of his eternal resentment for Ultras. He also tends to avoid death due to his cunning and intelligence, and use of alternate forms and his creations, the Terrible-Monsters, to avoid detection.


  • Yapool: Alternate Dimension Man (異次元人 I Jigen Jin)
  • Vakishim: Single-Horned Terrible-Monster (一角超獣 Ikkaku Chōjū)
  • Giant Yapool: Alternate Dimension Superbeing (異次元超人 I Jigen Chōjin)


Ultraman Ace

Yapool. ace

Yapool, as seen throughout Ace

Yapool, an ancient creature from another dimension with similarities to Satan and Legion, was an extremely skilled being of many consciousnesses with a knack for creating biological creations known as Terrible-Monsters. Yapool set his sights for Earth, but the original Five Ultra Brothers sent with their youngest member, Ultraman Ace and Earth's attack team at that time, TAC would came to stop him. Yapool would send many monsters to defeat Ultraman Ace, even seeking alien allies but all failed.


Main article: Vakishim

Vakishim in Ultraman Ace

For once, Yapool decided to take the matters on his own by turning himself into Vakishim (バキシム Bakishimu) to attack Earth, first by attacking Minami (the female co-host of Ultraman Ace). While she managed to survive, Vakishim managed to possess (or possibly impersonate) a small boy and used him as a puppet to hide from TAC. As the boy, he set his parents' and his home village on fire in a brutal display. Once TAC found out about the truth, Vakishim escaped from the boy's body and transformed into his true form and fled through his dimensional portal. Vakishim reappeared out from a different portal near TAC's HQ and proceeded to attack, with nothing that TAC's fighter jets could do. Finally, Ultraman Ace arrived to do battle and after a long brutal fight, Ultraman Ace destroyed Vakishim's horn with the Star Beam Cutter and kills Vakishim with the Palm Cutter followed by the Ace Slash. Despite Vakishim's defeat, but Yapool managed to survive in his own. Burn! Terrible-Monster Hell

Strange Old Man and Giant Yapool

Yapool original

Giant Yapool in Ultraman Ace

Old Man Yapool

Yapool in his Strange Old Man form.

In episode 23, Yapool took action on his own again, plotting a global scale plan with his two new alias, Strange Old Man (怪老人 Kai Rōjin) and Giant Yapool (巨大ヤプール Kyodai Yapūru).

One day, Yapool for the first time schemed an invasion on their own hands without using Terrible-Monsters. They started off by sending an agent of them in disguise as an old man, manipulating children from around the globe by singing a hypnotic music and said the world will end. While Hokuto was patrolling, he saw them but it took Yapool's teleporting ability to catch his attention and rushed to the beach where his kidnapping plot took place. Once arrived, the Strange Old Man transformed his head into that of a gorilla and summoned a snowstorm before he attacked Hokuto with his Fire Breath. Hokuto shot him but that made him fell from a cliff. Fortunately, he survived but heavily injured.

Knowing how far Yapool had gone through TAC decided to attack Yapool in his own domain. Using a special dimensional traveling device TAC sent Hokuto first because he volunteered. However, as the traveling started Yapool began to disrupt it and nearly teleported him into another dimension, but Zoffy arrived and managed to allow him and Minami to become Ultraman Ace. Once Ace was in his dimension Yapool combined themselves and used their anger over Ace and TAC to turn into a single entity, Giant Yapool. The battle between the two giants commenced as Giant Yapool and Ace exchanged beams until he was incapable of going on much further. With Giant Yapool beaten, Ace decided to leave his dimension. The Strange Old Man fainted after his comrades' defeat affect him as well and returning the kidnapped children once and for all. Although Yapol was not killed he would be incapacitated long enough for other aliens to attack Earth while he recovered. Reversal! Zoffy Now Arrives

NOTE: According to past magazines and episode 23 and 24 of "Ultraman Ace", the destruction of Giant Yapool caused his cells to disperse around the Earth and therefore leads to multiple Super Beast attacks in spite of his absence. This claim is even confirmed in the manual for Ultraman Ace Blu-ray BOX.

Yapool Woman

Yapool later schemed his vengeance on Hokuto, who was now the sole host of Ace since Minami had left after countless failure of his plans. He disguised himself as a female dentist and tried to make Hokuto to cause him to go insane by placing a hallucination chip on his teeth while he was given a dental care, causing Verokron II to appear only in front of his eyes everywhere. After Hokuto saw several delusions of Verokron II not seen by anyone else and had taken action himself, he was fired from TAC for his unwarranted assault on what they did not see.

Without Hokuto in TAC anymore Yapool felt satisfied and unleashed the real Verokron II to attack the city. The real Verokron II was eliminated by Ace afterwards as Woman Yapool's tricks were later foiled and was killed by Hokuto himself when he fired his gun at the fiend, as he fainted and was reduced to bubbles. But as he was about to report the dental clinic, the entire premise disappeared alongside Yapool's cadaver.The Revenge of Verokron

Alien Simon

Although seemingly dead, Yapool had survived and used a juvenile Alien Simon as a disguise. He first pretended to be targeted by Yapool in order to get closer to TAC. He later escorted some kids away to safety when Jumbo King attacked the city. Despite talking only in his kind's language but later he told Hokuto via specialized telepathy that he is Yapool in disguise and his true plan was to getting his revenge on TAC, Hokuto/Ace and depriving the children's kindness. Once again, Yapool was killed (seemingly for the last time) by Hokuto before transforming into Ace and fighting Jumbo King. Jumbo King was defeated and Yapool's reign on Earth seemingly ended. Tomorrow's Ace Is You!

Ultraman Taro

Yapool remodeled I

Giant Yapool, as seen in Ultraman Taro.

Yapool reappeared in Ultraman Taro surviving his battle against Ultraman Ace, as Remodeled Giant Yapool (改造巨大ヤプール Kaizo Kyodai Yapūru). He was responsible for the first monster of the series, Oil Drinker, that appeared in episode 1, though Yapool himself did not appear. Remodeled Yapool made his first appearance in episodes 29 and 30, with his trio of "Remodeled" chouju.

Yapool hid himself in exile and created a space ship that not only allowed him to enter Earth's dimension, but also travel through space. After the death of Oil Drinker, he revived Bemstar, as Remodeled Bemstar. ZAT was alerted of the situation and tested a new type of giant buzz-saw on Reconstructed Bemstar trying to imitate Jack's Ultra Bracelet, but Yapool's modifications proved that it was not enough to defeat Re-Bemstar. Kotaro Higashi transformed int to Ultraman Taro appeared to battle Re-Bemstar but was defeated. When Re-Bemstar was being repetitively stabbed in the eyes by a young man Hachiro Umino, Yapool sent Remodeled Sabotendar to kill the young man. Ultraman Taro then returned to both of the chouju. Furious that Taro was still alive, Yapool "remodeled" Verokron II to take care of the situation only for all his chouju to be defeated. Yapool tried to retreat from Earth's atmosphere, but Taro used his Strium Ray on Yapool's ship, defeating him once again. Bemstar Resurrected! Taro Absolutely Sacrificed! Counterattack! Monster Army

Ultraman Mebius & the Ultra Brothers

In the year 1986, the ever plotting Yapool sent a new Terrible-Monster of his, called the U-Killersaurus, to dispose of Ultraman, Ultraseven, Jack, and Ace. The battle began on the moon, with the four Ultras dodging everything U-Killersaurus threw at them. Grappling with the beast proved futile, as its strength was enough to hold off two Ultras at once. Yapool laughed at their efforts. He claimed that U-Killersaurus was created from the hate of the Yapool. When the four Bros. tried to use their beams on the Terrible-Monster, it flew towards Earth. The heroes tried to stop U-Killersaurus, only to be met by a barrage of his organic missiles. Avoiding those, the Bros. prepared to launch their beams again, when Ultraman halted them; firing their beams so close to the Earth could harm the citizens. After grappling with U-Killersaurus' extendable claws, it was then that the four of them did the only thing they could do without harming Earth: imprison U-Killersaurus in a dimensional prison with its creator, Yapool. After crippling U-Killersaurus by blasting off his limbs, Jack and Ace combined their Specium and Metallium Rays to send U-Killersaurus plummeting into the Earth. The Bros. arrived at the scene, and, using the Final Cross Shield, the four Bros. sealed U-Killersaurus and Yapool into the bay they had landed in.

"Commrade? Don't make me laugh. He was nothing but sacrificial pawn."

―Yapool as he reveal his betrayal against Alien Nackle.

For twenty years both Yapool and U-Killersaurus would remain sealed, until he duped a group of aliens, Temperor, Zarab, Guts, and Nackle into free them. After finally being revived by Alien Nackle and Alien Guts, U-Killersaurus was even more powerful than before. Yapool was revived as well, and casually killed his supposed ally, Nackle (Guts was destroyed by Mebius). As far as he was concerned, Nackle was just a pawn. U-Killersaurus then proceeded to mercilessly beat the Ultra Bros. with his new strength. Even when Ultraman Taro and Zoffy arrived to assist the brothers, they still could not stop this juggernaut of a monster. U-Killersaurus Neo soon caught Mebius with his large pinchers, and prepared his ultimate attack in order to kill him. However, the remaining Ultra Bros. combined their power with Mebius, and the result was Ultraman Mebius Infinity. U-Killersaurus Neo was helpless against him, as he easily smashed into his body and came out the other side, causing U-Killersaurus Neo to decay into dust, along with Yapool, ending his terror until Alien Empera revived him months later.Ultraman Mebius & the Ultra Brothers

Ultraman Mebius


Yapool's first appearance in Mebius

Yapool then reappeared in Ultraman Mebius episode 24 and became a recurring antagonist in the show.

Having escaped death, Yapool sought his revenge on Mebius by kidnapping Ryu Aihara and possess him in a plot to frame Mirai. His plan almost worked (sabotaged a GUYS aircraft) until Sakomizu appeared and foil his plot. Under Ryu's assurance, Mirai fired his GUYS Memory Display, forcing Yapool to exit and took over Vakishim before retreated.The Resurrection of Yapool When Asami Fujisawa presented GUYS with a Meteor capable of sealing the dimensional portal, Yapool possessed her in hopes of disposing the device but realised too late that it was all a ploy to lure his Super Beast Doragory.The Poisonous Moth's Program Yapool's dimension was sealed with Dimensional Dissolver in hopes of preventing him to attack Earth.Flying to Tomorrow

Emperor's Servitude

Ultr Mbs Ypl hmn

Yapool's human disguise

Several months later, he appeared to have unseal the portal and utilized Gadiba in possessing Red King within Tatar Island. Although fought by Mebius, Gadiba soon expelled under Yapool's orders, leaving Gomora (who borrowed the appearance of Red King) to deal with the Ultra.An Old Friend's Visit He would soon join the ranks of Dark Four Heavenly Kings, confidently being the first to left and attack Mebius in hopes of giving the Earth to Alien Empera. His first mission is by luring GUYS to outer space with a crystal missile and for Lunaticks to deal them while personally sending his revived Ace Killer to fight Mebius. In the middle of the battle, he assimilated Gadiba with Ace Killer into Mebius Killer, overpowering Mebius until he comes up with a new tactic; Mebium Dynamite. Once Mebius revert to Mirai, he kidnapped the Ultra and two other humans, Aya and Hirukawa.Threatening Mebius-Killer

Ultr Mbs Ypl

Giant Yapool, as seen in Ultraman Mebius.

He brought his targets to a dimension which appeared to be Tokyo in ruins. Seeing Hirukawa's irrational desperation to survive, he coerced the man to shoot both Aya and Mirai, ultimately exposing the latter as an Ultra in disguise. When Mirai refused to admit the ugly truth of humanity, Yapool engages in a battle against the Ultra and successfully weaken him. He shift his attention to Aya and blasted the area in front of her, nearly killing her. Encouraged by Seiji, Mebius' power and spirit were restored, and much to Yapool's surprise, he stood up once more, and assumed his Burning Brave Mode. This time, the tide of the battle turned, as Mebius went on an all-out attack on Yapool before dealing the finishing blow. His last words were that of informing Mebius that more foes, even stronger, would come, such as Deathrem, and Grozam.Ace's Wish

Ultraman Mebius Gaiden: Ghost Rebirth

Ultrmn Mbs The Four Heavenly Kings

The Dark Four Heavenly Kings

Yapool was revived and possessing his creation, Mebius Killer. Yapool, along with Deathrem, Grozam, and Armored Mefilas (G) assault the Ultra Brothers in an attempt to reunite the Giga Battle Nizer and Mechazam in an attempt to resurrect Alien Empera. However, their plan was foiled when Ultraman Mebius looses the Giga Battle Nizer and Mechazam sacrifices his life to keep the Emperor from being revived. After a battle with Ultraman Ace, he was finally destroyed by a single shot of his Metallium Ray. Ultraman Mebius Gaiden: Ghost Rebirth

Ultraman Ginga

Yapool appeared in Ultraman Ginga as a Spark Doll. In episode 7, he along with many monsters are seen cheering on Ultraman Ginga as he fights Dark Galberos. It is likely that Yapool departed back to his dimension after the defeat of Dark Lugiel.

Ultraman Ginga S

Yapool GingaS

Yapool harassing Gouki

Yapool return with Vakishim on Ultraman Ginga S episode 5, this time inside his Giant Yapool body for most of his appearance.

Yapool appears when Vakishim was fighting Ginga. Angry at Android One Zero for using Vakishim's Spark Doll without permission, he took control of the Terrible-Monster away from the android and cast her out of the Lived Doll. He then sent the Terrible-Monster back to his home dimension and told One Zero and Exceller that he will deal with Ginga, knowing about the Chibull's plan to steal the Victorium, and then he vanished, planning on something diabolical with the humans. This event revealed that Yapool was in Vakishim when the monster had turned into a Spark Doll, thus resulting him slumbering inside the Terrible-Monster.

Soon he possessed Gouki Matsumoto and went on a small rampage and even trapped Hikaru Raido in a Dimensional Rift. When Gouki struggled with Yapool for control after seeing a pregant woman needing help and taking her to a nearby hospital, the Terrible-Monster maker transformed into his giant form with Gouki still possessed and was about to strike Arisa Sugita and her UPG vehicle but Gouki fought back until Ginga kicked Yapool, freeing Gouki from his possession. He then ordered Vakishim to retreat back into their dimension but Ultraman Victory followed suit and brought it back. He then fought with Ginga himself who transformed into Strium form and Victory "UITrans" his right hand into the Gudon Whip. After Vakishim's defeat, he tried to return to his dimension, but Victory stopped him and he was then defeated by Ginga using the Metallium Ray. Friend & Demon

Ultra Fight Victory

"Evil dimensional people never die, and the bitter animosity towards the Ultra Warriors allowed me to return with deeper darkness than ever."

―Yapool explaining to Sakuya how he survived his last fight with Ginga and Victory.

"(Laugh) Don't think you're win yet. Now, nobody can stop the revival of the Emperor. Soon, the whole universe will end now!"

―Yapool's last words.


Yapool in Ultra Fight Victory.

Yapool returned in Ultra Fight Victory as the one responsible for sending the Terrible-Monster. He somehow survived his destruction during his previous defeat at the hands of Ultraman Ginga.

He was first seen studying Ultraman Victory's Ultlance ability, while he was fighting Aribunta. Yapool appeared to Sakuya and confiscated her Victorium Necklace, while stating his plan to go to the Victorium Core. Afterwards, he went down to the Victorium core and used Sakuya's necklace to gather energy from the core itself. Yapool then revealed himself after Victory defeated Aribunta and stated he already had enough power to revive Juda. He then sent Doragory, Verokron, and Vakishim to fight Leo and Astra and protect the distortion that housed the reviving Space Emperor and ordered Ace Killer to stop Ace from saving Ultraman Ginga.

When Victory arrived, Yapool explained that he was able to copy the Ultra's UITrans, and had given it to Ace Killer, declaring him, Victory Killer and later summoned Lunaticks to kill Ginga. After both Terrible-Monster have been killed by Victory and Shepherdon, and Ginga and Ace have been restored, Yapool went to Planet Gua and used the Victorium he stole from the core to kickstart the revival of Juda. He reveled in his glory until Ginga, Victory, and Ace showed up and fired the Victorium Shoot, Ginga Cross Shot, and Punch Laser respectively at the Terrible-Monster. Yapool then grew in size and joined the Terrible-Monster in fighting the Ultras and was winning over the new Ultras thanks to his bitter animosity towards the Ultra Brothers empowering him until the old Ultras suggested that they merge to form Ultraman Ginga Victory and they did. The fight quickly swung into Ginga Victory's favor, and Yapool was defeated with the Ultra Fusion Shoot. In his last act, Yapool gives in his own energy to revive Juda.Ultra Fight Victory

Ultraman X

Continuing from Ultra Fight Victory, it was revealed that Yapool not only revived Juda, but also Mold and Gina as well without notice. Sword of Victory


Yapool Man

Yapool men

Yapool Men in Ace

Yapool man

Yapool Man in Mebius

Yapool Man (ヤプール人 Yapūru Jin) is the form Yapool took when he first appeared on screen and in his own dimension. Originally, this form was thought to be a group of alien called the Yapool. The Japanese character 人 means people or person, this is how Yapool was originally referred to as a group instead of a being. It was later revealed that the Yapool shown in Ultraman Ace is either a collective form, comprising all of his race, or just a single Yapool acting on his own desires and tactics.

In Ultraman Ace, Yapool Man's appearance was that of people in purple with yellow linings in their body. However, starting from Ultraman Mebius and so on, Yapool Man's appearances would be more identical to the Giant Yapool.

Powers and Weapons​
  • Body Snatch: Yapool is capable of body snatching humans and even his own Terrible-Monster. While possessing them their abilities and intelligence increase. However, Yapool does not certain some humans by force unless they sell their soul to him.
  • Terrible-Monster Creating Machine: Yapool has a machine that creates Terrible-Monsters out of thing such as common Earth animals.
  • Black Magic: Aside from technological use, Yapool can even use Black Magic to create Terrible-Monsters as seen used on ordinary human to create Cowra and Mazarius, even on Aprasa Fairy to turn her into the monstrous Aprasar.
  • Dimensional Manipulation: Yapool can manipulate dimensions, primarily to transport his Terrible-Monster to Earth and back. The portals appear to open the sky like an eggshell while doing this.
  • Shapeshifting/Human Disguise: In some operations, Yapool was seen initiated his own human disguise and even masquerade as an Alien Simon. In Ultraman Mebius, his disguise resembles Black Directive.
  • Combine: All of the Yapool can combine together to form Giant Yapool.
  • Immortality: As stated in Ultra Fight Victory, Yapool said himself that he would never die as long as his strong hatred for Ultra Brothers existed. Therefore, once he's defeated, he will return with greater power.
Ultraman Mebius
  • Corruption: Indeed a demon by the Ultra Brothers, Yapool can corrupt any individual by whispering to their heart. Only seen in the movie to manipulate aliens like Alien Zarab, Alien Guts, Alien Nackle, and Alien Temperor. At the film's climax, he admitted that they were just pawns of his schemes as he destroyed their saucer after each others' death (Alien Nackle however survived till his revival but only to be betrayed in the end).
  • Gadiba: Yapool controls a tiny spirit/gas monster, called Gadiba. Can enter the bodies of monsters, increase their strength, etc.

Giant Yapool

Giant Yapool (巨大ヤプール Kyodai Yapūru) is Yapool's true form. In Ultraman Ace, he created this form by merging multiple Yapool Man forms together. However, this form has more recently become Yapool's default appearance.

  • Height: 50 m, 14 cm ~ 50 m (Ginga S)
  • Weight: 82,000 t, 150 g ~ 82,000 t (Ginga S)
  • Origin: Yapool's Dimension
Powers and Weapons
  • Blade Hand: Giant Yapool's right arm ends with a large, sharp blade. Effective for bashing and slashing foes.
    • Blade Beam: Giant Yapool can fire a yellow beam from the blade.
    • Dimension Beam (ディメンションビーム Dimenshon Bīmu): Giant Yapool can emit a powerful energy blast from his bladed left hand. Can cause large explosions and be fired rapidly.
  • Armor: Giant Yapool has armor that allows him to survive attacks like Ultraman Ace's Metallium Ray.
  • Physic Wall Explosion: Giant Yapool can create a wall of explosions as a defensive barrier.
  • Immortality: As stated in Ultra Fight Victory, Yapool said himself that he would never die as long as his strong hatred for Ultra Brothers existed. Therefore, once he's defeated even in any form he resided, he will return with greater power.
  • Telekinesis: Giant Yapool displayed telekinetic powers, allowing him to throw his foes around like rag dolls.
  • Terrible-Monster Summon: As long as Yapool's energy is sufficient, he will be able to summon Terrible-Monster. The Terrible-Monster will usually appear through a giant crack in the sky that would disappear after the Terrible-Monster exits.
Ultraman Mebius
  • Dimensional Travel: Yapool can travel to and from his dimension at will by making a hole in the sky, which seems to shatter like glass (in Ultraman Hit Song History: New Hero Chapter and Ginga S this portal is shown to be a circular shape). He can also use this to go to any place he wants, and the size of the hole ranges from small to extremely large. The sky will piece itself back together when he leaves or re-enters the portal. He can even take others through these holes with him. Beings of light and humans can not sustain for long in this dimension.
  • Killer Marionette (キラーマリオネット Kirā Marionetto): A tag-team attack with Ace Killer. Giant Yapool charges Ace Killer with purple aura energy for the latter to perform a screwdriver attack towards the target.
Ultraman Ginga S
  • Size Change: Instead of using human disguises, Yapool can change his Giant Yapool body into human size and back into Giant Yapool.
  • Body Snatch: Giant Yapool can possess humans but unlike his first attempts, it seemes that he needs to possess the victim twice to complete the assimilation process. However, if the victim has a strong will, (s)he will be able to temporarily paralyze Yapool.
  • Mirror Travel: Giant Yapool can travel through mirrors. Even if the mirror he appeared in was smashed, he still lives and continue to appear through various mirror shards.
Ultra Fight Victory
  • Teleportation: Yapool is able to teleport to a location at will.
  • Minus Energy Release: Upon death, Yapool after explosion can transfer his remaining Minus Energy to revive other beings.
  • Victorium Necklace: Stolen from Sakura. Yapool possess a Victorium necklace.
    • Victorium Core Energy Absorption: Using the necklace, Yapool can absorb energy from the core and store in the necklace. This energy can be released to speed up Juda's revival process.

Remodeled Giant Yapool
Remodled Kyodai Yapool

Re-Giant Yapool

Yapool reappeared in Ultraman Taro after being revived, as Remodeled Giant Yapool (改造巨大ヤプール Kaizo Kyodai Yapūru).

Powers and Weapons
  • Spaceship: Giant Yapool had a large vehicle that can travel through space and summon different monsters to do his bidding. He can also used it to revive and alter dead monsters. His original giant size can also fit in it.
  • Staff: Giant Yapool wields a staff with the top of it heavily resembles his blade hand. It's used to revive monsters.
  • Immortality: As stated in Ultra Fight Victory, Yapool said himself that he would never die as long as his strong hatred for Ultra Brothers existed. Therefore, once he's defeated even in any form he resided, he will return with greater power.

Strange Old Man
Old Man Yapool
  • Height: Human
  • Weight: Human
  • Origin: Yapool's Dimension
Powers and Weapons
  • Hypnotic Song: Yapool can induce a hypnotic song to lure children into his lead.
  • Teleportation: Yapool can teleport himself and others to a destined location.
  • Snowstorm: Yapool can summon a snowstorm.
  • Shapeshifting: Yapool can morph his human face into a gorilla head for an attack mode.
  • Fire Breath: Yapool can exhale a stream of fire for combat.
  • Staff: Yapool carried a wooden staff which he used to manipulate nature such as slowing a wave, removing grasses and withering plants.
  • Immortality: As stated in Ultra Fight Victory, Yapool said himself that he would never die as long as his strong hatred for Ultra Brothers existed. Therefore, once he's defeated even in any form he resided, he will return with greater power.

Yapool Woman
Woman Yapool

With Yapool surviving his fight with Ace despite losing the ability to assume his Giant Yapool form due to his injuries, he took the form of a female dentist, disguising himself as Yapool Woman (女ヤプール On'na Yapuru) in order to exact his revenge on Hokuto. The Japanese word "Onna" (女Lit. Woman) indicates the gender of his disguise.

  • Height: 164 cm
  • Weight: 48 kg
  • Origin: Yapool's dimension
Powers and Weapons
  • Illusional Verokron II: As seen when she was performing dental surgery on Hokuto, the man received hallucinations of Verokron. Each time Hokuto saw this, it caused his teeth intense pain in response to Yapool's spell.
  • Extraordinary Jumper: Yapool Woman could perform a backflip, but she wasn't able to avoid Hokuto's shot.
  • Immortality: As stated in Ultra Fight Victory, Yapool said himself that he would never die as long as his strong hatred for Ultra Brothers existed. Therefore, once he's defeated even in any form he resided, he will return with greater power.

Alien Simon
Yapool 8
Main article: Alien Simon

In his final appearance in Ultraman Ace, Yapool took the form of a juvenile Alien Simon (サイモン星人 Saimon Seijin), a race of aliens that he had defeated in the past, as a means to evade TAC and unleash his strongest Terrible-Monster yet, Jumbo King.

Powers and Weapons​
  • Telepathy: Yapool/Alien Simon can talk to anyone he desired via telepathy as seen when he admitted to Hokuto that he's indeed a Yapool in disguise. Yet, this telepathic ability cannot only be interpreted by normal humans.
  • Dimensional Manipulation: Yapool can manipulate dimensions, primarily to transport his Terrible-Monster to Earth and back. The portals appear to open the sky like an eggshell while doing this.
  • Immortality: As stated in Ultra Fight Victory, Yapool said himself that he would never die as long as his strong hatred for Ultra Brothers existed. Therefore, once he's defeated even in any form he resided, he will return with greater power.

Man in Black
Yapool Human Disguise

In Ultraman Mebius, Yapool created a disguise known as the Man in Black (黒ずくめの男 Kurozukume no Otoko). He is often seen holding various balloons.

Powers and Weapons​
  • Telepathy: Yapool can talk to anyone he desired via his mind.
  • Telekinesis: Yapool can use telepathy to control an opponent's movements. He can hold them in place with his right hand, as well as flip them around and throw them.
  • Teleportation: Yapool's human disguise is able to teleport at will.
  • Balloons: The balloons that Yapool use are able to perform various tasks:
    • Green Striped Red Balloon - Call Ace Killer to Earth
    • Purple Balloon - Summons Gadiba
    • Black Balloons - Hang a grown man
  • Dimensional Manipulation: Yapool can manipulate dimensions, primarily to transport his Terrible-Monster to Earth and back. The portals appear to open the sky like an eggshell while doing this.
  • Immortality: As stated in Ultra Fight Victory, Yapool said himself that he would never die as long as his strong hatred for Ultra Brothers existed. Therefore, once he's defeated even in any form he resided, he will return with greater power.


Other Media

Ultraman Hit Song History: New Hero Chapter

Yapool returns in this special track to attack Ultraman Zero. He first lures the Ultra into his dimension and bombards him with attacks. However, the Heisei Ultras arrive and begin assisting Zero to fight back against Yapool. Ultraman Hit Song History

Ultraman F

NOTE: Before the novel was bundled into a book, it was first published in monthly magazines. Yapool's chapter is a filler that is exclusive to the novel book itself.

Giant Yapool appeared in this novel as one of the many antagonists.

Through a dimensional crack created by Soso via Clone Bullton, Yapool emerged on Nagoya, Japan, having fused to his Super Beast U-Killersaurus. He demanded an Ultraman for him to fight and thus Hayata (who was separated from Ultraman) appeared. Although declared as a "remnant of the original Ultraman", Yapool was quick to dismiss the former Ultra Host and held Ultraman F as a hostage. F retaliated by escaping and destroy both alien and Super Beast. Ultraman F


HG Ultraman Series

Yapool Man Gashapon

Yapool Man

  • Yapool Man (HG Ultraman Series, 2014)
    • Release Date: 2014/7/25
      • Shipping Date: 2014/11 (Estimated)
    • Material: PVC
    • Age recommendation: 15 years and up
    • Size: About 85 mm
    • Made in: China

As part of the "HG Ultraman Series" gashapon toy celebration, three sets of aliens that had fought the Showa Ultras, Yapool Man, Alien Pedan and Black Directive was released. The set can be sold on available gashapon machines at Japan while shipping would be available in November 2014.

NOTE: The picture shown was a prototype as of the actual figure might appear to be different.


Ultraman Ace

Ultraman Taro

Ultraman Mebius

Ultraman Hit Song History: New Hero Chapter

Ultraman Ginga S

Ultra Fight Victory



  • When in his Giant form, Yapool reuses Black King's roars.
  • Yapool is the first major antagonist in the Ultraman Series to be recurrent, with his role in the story of Ultraman Ace persisting throughout the series, rather than simply being a final opponent for the Ultra to battle, as in the case of Pandon or Zetton.
  • Yapool's name was taken from Shōzō Numa's 1956 science fiction (also cult) novel, Kachikujin Yapu.
  • Giant Yapool's motif is based on a crab and Great King Enma, the god who judge the dead and preside over the Narakas ("Hells" or "Purgatories"), and the cycle of rebirth in Buddhism.
  • Yapool is said to be part of Jumbo King in Pictorial First Volume 2002.
  • In aftermath of his appearance in Ultraman Ace, Giant Yapool was used as an attraction suit until its head component deteriorated, causing a new head to be made for his return in Ultraman Taro. A magazine at that time explained that Giant Yapool was revived and had to perform reconstructive surgery to recover from his last battle with Ace. However, the result was crudely done which resulted in a deformed head, resulting in a metallic headpiece being installed to replace the original.
  • While not mentioned in Ultraman Taro, a 1990 magazine stated that Yapool collaborated with Alien Empera during his presence, with Reconstructed Bemstar being one of the products of their collaboration.
  • His appearances in Ultraman Taro established Giant Yapool as the default form for Yapool.
  • Since Giant Yapool only fought Ace in his own dimension, none of TAC's documents mentioned him, as revealed in Ultraman Mebius.
  • Yapool being inside Vakishim's body in Ultraman Ginga S is a tribute to the Terrible-Monster's appearance in Ultraman Ace where it was a form of Yapool.
    • His defeat by the Metallium Ray is a homage to his debut series; however, Yapool was able to survive that attack back then.


Ultraman Ace Kaiju
Verokron | Yapool | Chameleking | Vakishim | Garan | Aribunta | Giron Man | Brocken | Alien Metron Jr. | Doragory | Muruchi II | Gammas | Zaigon | Alien Antira | Unitang | Sabotendar | Baraba | Ace Killer | King Crab | Cattle God | Cowra | She-Devil | Hotarunga | Black Pigeon | Android Couple | King Kappa | Zemistlar | Aprasar | Aprasar Fairy | Space Mask | Black Satan | Giant Yapool | Mazaron Man | Yojo | Mazarius | Alien Orion | Sphinx | Alien Hipporit | Lunaticks | Undergroundmon | Gitagitanga | Red Jack | Baktari | Coakes | Bad Baalon | Kaiteigagan | Dreamgillas | Soundgillar | Machless | Snowgiran | Namahage | Alien Fire | Firemons | Alien Steal | Kaimanda | Shishigoran | Iceron | Woo II | Fubugirara | Onidevil | Gasgegon | Daidarahoshi | Hanzagiran | Verokron II | Yapool Woman | Univerlages | Aquarius | Alien Revole | Signalion | Geegon | Alien Simon | Jumbo King
Ultraman Taro Kaiju
Ultraman Taro Oil Drinker | Tigris Flower | Astromons | Cosmo Liquid | Live King | King Tortoise | Queen Tortoise | Mini Tortoise | Jirenma | Ganza | Tagarl | Tondaile | Arindo Ants | Arindo | Depparas | Basara | Volkeller | Sheltar | Enmargo | Miegon | Okariyan | Birdon | Kemjila | Flying Raidron | King Zemira | Pandora | Chinpe | Rodera | Space Moths | Mururoa | Rabbidog | Mukadender | Mandarin Grass | Alien Mefilas II | Re-Eleking | Reconstructed Giant Yapool | Reconstructed Bemstar | Reconstructed Sabotendar | Reconstructed Verokron | Mushra | Guron | Alien Temperor | Alien Katan | Grost | Hertz | Alien Medusa | Alien Miracle | Alien Terrorist | Mochiron | Tyrant | Gongoros | Android Seiko | Elegia | Motokureron | Alien Kisaragi | Memole | Alien Dorzu | Piccolo | Gorgosaurus | Gelan | Alien File | Veron | Orphy | Alien Khan | Garaking | Rindon | Dorobon | Samekujira | Alien Valky
Ultraman Story Tyrant | Antlar | Alien Borg | Dokkun | Zemistlar | Gudon | Twin Tail | Re-Eleking | Alien Mefilas | Juda | Alien Baltan V | Alien Hipporit | Enmargo | Grand King
Ultraman Fighting Evolution Kaiju
Ultraman Fighting Evolution Alien Baltan | Gomora | Dada | Zetton | Eleking | Alien Metron | King Joe | Ace Killer | Alien Magma
Ultraman Fighting Evolution 2 Alien Baltan | Dada | Alien Magma | Tyrant | Yapool | Bemstar | Ace Killer | Giras Brothers | Zetton | King Joe | Gomora
Ultraman Fighting Evolution 3 Alien Baltan | King Joe | Bemstar | Ace Killer | Tyrant | Alien Magma | Giras Brothers | Silver Bloome | Gomora | Zetton | Dada | Fire Golza | Geozark | Zoiger | Gatanothor | Spume | Reicubas | Gan-Q Code №00 | Gan-Q Code №01 | Zoruim | Gloker Pawn | Gloker Bishop | Giga Endra | Red King | Gudon | Twin Tail | Vakishim | Evil Tiga | Ace Robot | Delusion Ultraseven | Imitation Ultraman Dyna
Ultraman Fighting Evolution Rebirth Bullton | Gomora | Red King | Eleking | EX Eleking | Kyrieloid | Chaos Kyrieloid | Tyrant | EX Red King | EX Gomora | Bullton II | Imitation Ultraman Agul | EX Tyrant | EX Tyrant II | Geronimon | Alien Baltan | Waroga | Chaos Waroga | Alien Mefilas | Chaosroid T | Chaosroid S | Chaosroid U | Neo Chaos Darkness | Neo Chaos Darkness II
Ultraman Fighting Evolution 0 Alien Baltan | Zetton | Eleking | Black King | Vakishim | Alien Hipporit | Alien Temperor | Alien Babarue
Ultraman Mebius Kaiju
Ultraman Mebius Dinozaur | Gudon | Birdon | Miclas | Cherubim | Dinozaur II | Sadola | Twin Tail | Bogar | Lim Eleking | Alien Fanton | C-Pin 929 | Bogarmons | Dinozaur III | Windom | Dinozaur Reverse | Kodaigon | Mukadender | Insectus | Gromite | Zamsher | Alien Magma | Alien Valky | Saramandora | Bemstar | Daigarugu | Arstron | Cherubim II | Lesser Bogar | Chronorm | Alien Angel | Yapool | Fire Windom | Vakishim | Doragory | Verokron | Marquette Zetton | Ultraman Mebius (Maquette) | Nova | Maquette Nova | Inpelaizer | Roberuga | Alien Mates | Zoa Muruchi | Femigon | Alien Reflect | Alien Babarue | Angross | Alien Psychokino | Jasyuline | Arigera | Alien Serpent | Sorichra | Sorichran | Roberuga II | Hoe | Gomora | Mysterious Saucer fleet | Gadiba | Red King | Mebius Killer | Giant Yapool | Deathrem | Lunaticks | Grozam | Alien Mefilas III | Gromite II | Mass-Produced Inpelaizer | Alien Empera
Ultraman Mebius Gaiden: Hikari Saga Arb | Bogar | Bemstar | Alien Babarue
Ultraman Mebius & the Ultra Brothers U-Killersaurus | Yapool |Alien Temperor | Alien Zarab | Alien Guts | Alien Nackle | U-Killersaurus Neo
Ultraman Mebius Gaiden: Armored Darkness Saramandora | Mukadender | Roberuga | Cherubim | Armored Darkness
Great Decisive Battle! The Super 8 Ultra Brothers King Guesra | King Pandon | King Silvergon | King Goldras | Super Alien Hipporit | Giga Khimaira | Black Silhouette
Ultraman Mebius Gaiden: Ghost Rebirth Mechazam | Inpelaizer | Alien Mefilas III | Grozam | Deathrem | Mebius Killer | EX Zetton | Ghost Rebirth
Ultra Galaxy Kaiju
Ultra Galaxy Mega Monster Battle Telesdon | Sadola | Red King | Rei's Gomora | Rei's Litra (S) | Juran | Golza | Gudon | Neronga | Bemstar | Fire Litra | Fire Golza | Gan-Q | Banpira | Twin Tail | Froguros (B) | Bullton | Cherubim | Arstron | Eleking | Gromite | Angross | Arigera | Zoa Muruchi | Nova | Saramandora | Lunaticks | King Joe Black | Verokron | Doragory | Kate | Zetton | Reimon | EX Gomora
Ultra Galaxy Mega Monster Battle: Never Ending Odyssey Alien Pitt | Reionics Hunter | Gomess (S) | Magular | Rei's Gomora | Dorako | Eleking |Alien Hook | Rei's Litra (S) | Alien Guts | Alien Zelan | Arstron | Alien Nackle | Galberos | Illusion Zetton | Reimon Burst Mode | Reionic Burst Gomora | Doragory | Alien Metron | Bemstar | Alien Babarue | Antlar | Vakishim | Alien Keel Grande | Tyrant | Kate | Fire Litra | Alien Zarab | Imitation Ultraman | Alien Mefilas | Armored Mefilas | Dada | Alien Temperor | Arigera | Armored Darkness | Miclas | Alien Zetton | Telesdon | King Joe Black | Cherubim | Red King | Alien Reflect | Birdon | King Joe Scarlet | Alien Rayblood | EX Gomora | EX Red King
Mega Monster Battle: Ultra Galaxy Legends The Movie Bemular | Alien Zarab | Zaragas | Rei's Gomora | Dorako | Bemstar | Saramandora | Alien Shaplay | Windom | Miclas | Agira | Pigmon | Black King | Rei's Litra (S) | Gomess (S) | Alien Baltan | Antlar | Red King | Magular | Telesdon | Dada | Zetton | Eleking | Alien Metron | Alien Guts | Arstron | Sadola | Gudon | Twin Tail | Alien Nackle | Verokron | Vakishim | Doragory | Lunaticks | Birdon | Mukadender | Alien Temperor | Tyrant | Alien Valky | Alien Magma | Alien Pressure | Alien Babarue | Nova | Hoe | Fire Golza | Gan-Q | Galberos | Froguros (B) | Banpira | Cherubim | Gromite | Zoa Muruchi | Alien Reflect | Angross | Jasyuline | Arigera | Roberuga II | King Joe Black | Super Alien Hipporit | King Silvergon | King Goldras | King Pandon | King Guesra | Alien Zetton | Nurse | Belyudra
Ultra Galaxy Legend Gaiden: Ultraman Zero vs. Darklops Zero Rei's Gomora | Rei's Litra (S) | Darklops Zero | Mecha Gomora | Alien Salome | Imitation Ultraseven | Imitation Ultraman (SR) | Imitation Ultraman Jack (SR) | Imitation Ultraman Ace (SR) | Imitation Zoffy (SR)
Mega Monster Battle: Ultra Adventure Bullton | Gomora | Pigmon | Red King | Alien Pedan | Alien Hipporit | Bemular | Alien Nackle | Yapool | EX Tyrant | Alien Keel Vittorio | EX Gomora | Alien Zarab | EX Eleking | Alien Metron | EX Red King | Alien Babarue | King of Mons | Bajiris | Baby Arados | Alien Rayblood | Grand King | Silver Bloome | Deathfacer
Mega Monster Battle: Ultra Adventure NEO Kyrieloid | Kanegon | Red King | Agira | Vittorio | Alien Guts | Gatanothor | EX Zetton | Rayblood | Kate
Ultraman Ginga Kaiju
Ultraman Ginga Alien Valky | Black King | Thunder Darambia | Kemur Man | King Pandon | Ragon | Doragory | Alien Nackle Gray | Dark Galberos | Zaragas | Red King | Antlar | Jasyuline | Super Grand King | Dark Lugiel
Ultraman Ginga Theater Special Alien Icarus | Tyrant
Ultraman Ginga Theater Special: Ultra Monster ☆ Hero Battle Royale! Kanegon | Alien Baltan | Red King | EX Red King | Telesdon | Dorako | Gomora | Reionic Burst Gomora | EX Gomora | Mecha Gomora | Zetton | Miclas | Snowgon | Yametaranese | Alien Miracle | Mochiron | Alien Akumania | Evil Tiga | Gan-Q | Chaos Ultraman | Zamsher | Zoa Muruchi | Chaos Ultraman | Chaosroid S | Chaosroid T | Chaosroid U
Ultraman Ginga EX Alien Magma | Zetton
Mountain Peanuts Detton | Jamila | Nosferu | Android One Zero
Ultraman Ginga S Victorian | Alien Chibull Exceller | Android One Zero | Chiburoid | Shepherdon | EX Red King | Eleking | Alien Guts Vorst | Inpelaizer | King Joe Custom | Sadola | Gudon | Yapool | Vakishim | Gomora | Fire Golza | Gan-Q | Five King | Bemular | Bemstar | Doragory | Verokron | Alien Akumania Muerte | Alien Metron Jace | Zoa Muruchi | Birdon | Alien Zetton Berume | Hyper Zetton | Vict Lugiel | Alien Valky | Alien Nackle Gray | Alien Icarus
Ultraman Ginga S The Movie: Showdown! The 10 Ultra Warriors! Etelgar | Five King | Alien Sran | Alien Empera | Dark Lugiel
Ultra Fight Victory Aribunta | Giant Yapool | Ace Killer | Victory Killer | Verokron | Vakishim | Doragory | Lunaticks | Shepherdon | Juda Spectre | Super Grand King Spectre
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