Villains Wiki

Hi. This is Thesecret1070. I am an admin of this site. Edit as much as you wish, but one little thing... If you are going to edit a lot, then make yourself a user and login. Other than that, enjoy Villains Wiki!!!


Villains Wiki

This Villain was Headlined on May, 2017.

Villain Overview

Long ago in a distant land, I, Aku, the shapeshifting Master of Darkness, unleashed an unspeakable evil! But a foolish Samurai warrior, wielding a magic sword, stepped forth to oppose me. Before the final blow was struck, I tore open a portal in time and flung him into the future, where my evil is law! Now the fool seeks to return to the past, and undo the future that is Aku!
~ Aku narrating the opening sequence of Samurai Jack (Seasons 1 to 4 and Episode CI).
Do not worry, samurai, you will see me again. But next time, you will not be so fortunate.
~ Aku after he flung Jack to the future.
You're back already?! No, wait!
~ Aku's last words after Jack finally returned to the past to kill him.

Aku is the main antagonist of the Samurai Jack animated series.

He is a ruthless, diabolical, and manipulative demon king and the archenemy of Samurai Jack and the biological father of Ashi and her sisters. He is easily one of the most successful cartoon villains, as he managed to rule the world, and was unstoppable for years, as it took Samurai Jack 50+ years to defeat him. He is also the fragment of a black virus that is the true ultimate evil.

Aku tends to switch back and forth between being played for laughs, and being a truly threatening villain. He would either do something pettily villainous not to be taken too seriously, like telling stories to children to make them like him instead of Jack, or be extremely terrifying and dangerous, like causing genocide and enslaving innocents, depending on the episode.

In the first four seasons of Samurai Jack, he was voiced by the late Mako, who also played Happy Cat in Duck Dodgers and Han Yu Kim in True Crime: Streets of L.A.. In the fifth and final season, he was voiced by Greg Baldwin, who also played Frank Fontaine in BioShock after Mako's death in 2006.


Long ago in the depths of space, a vast, formless, non-sentient mass of pure evil incarnate appeared, seemingly out of nothing. This black mass was attacked and vanquished by the three mighty gods: Odin, Ra, and Vishnu, in order to protect the universe from its influence - yet a small shard of the great entity managed to survive and drifted off into space. For many eons this shard continued tumbling through space until it eventually landed on Earth, causing the extinction of the dinosaurs in the process.

Many years later, the site on which the shard landed would become the ancient island of Japan, which the shard infected like a horrible disease - creating vast forests of evil in the land and threatening to consume it. Eventually, the shard's threat became so great and impressive that the Emperor of Japanese kingdom decided to rid the land of the evil substance once and for all using magical-oil made by Buddhist monks. However, when he fired an arrow coated with this oil into the evil entity, it did not destroy it but rather gave it form and sentience, thus forming Aku as a humanoid threat of just unimaginable power. To make matters worse, no mortal weapon could harm Aku, making him completely invincible.

However, with aid from Odin, Ra, and Vishnu, the Emperor wielded a magical sword with the ability to harm Aku. Using the sword, the Emperor faced Aku in a showdown that resulted with Aku being sealed away in a form that resembled a diseased black tree. Unfortunately, the imprisonment would not last much more than a decade before a solar eclipse freed Aku again.

Aku would then proceed to lay waste to the Japanese kingdom the Emperor once again ruled, this time capturing the Emperor before he could grab the sword. The empress ran away with the sword and her son so that he could be trained to be a samurai warrior. Years later the Emperor's son challenged Aku to a fight the Pit of Hate inside his towering castle, the Samurai very nearly killed Aku for good using the magical sword but Aku threw open a portal in time and transported him to a future-world in which Aku ruled supreme. The Samurai took the name "Jack" while trapped in the future and became Aku's archnemesis, as he still wields the only weapon capable of harming Aku.

For the rest of the series, Aku is portrayed as the tyrannical, omnipresent, all-powerful and manipulative ruler of the world and is an almost unstoppable force, yet he fears Jack, knowing very well that the warrior has the power to slay him, Aku has placed a high bounty on Jack's head and is always trying to dispose of him, whether it be with manipulation, cunning, force, or trickery.

Shadow of Aku

Jack encountered Aku yet again at the Pit of Hate, where Aku uses his fluid to attach to pieces of samurai armor before he can let Jack reach the time portal. Jack battled Aku but was too late to go to the time portal.

Samurai Jack (2017)

Aku returns in the new season and fights against Jack for the last time. In the series, it is also shown that Aku donated a small portion of himself to the Cult of Aku after seeing the statue they built in his likeness. Afterwards, the cult leader drank the potion which somehow impregnated her, creating the Daughters of Aku.

In Episode XCII, Jack fights an assassin named Scaramouche the Merciless who claims to be "Aku's favorite assassin". He tries to call Aku that Jack lost his sword, but Jack destroys his phone before he can get the chance, leading to a confrontation with Scaramouche where Jack seemingly destroys him.

In Episode XCIII, Aku wakes up from his long nap and becomes annoyed with his Royal subjects and minions as they come to his lair, bow down to him and give him gifts while he is trying to do his daily routine. When his minions mention that they built more robots to destroy Jack, Aku states that he doesn't care anymore. Aku then creates a clone of himself to serve as a psychiatrist who asks him about what has been troubling him lately. Aku tell the psychiatrist that it has been 50 years since he destroyed all of the time portals and that he hoped that Jack would have just died off the normal way, but, as a result of the time traveling process, not only has Jack not died from old age but he hasn't even aged a single day and has become biologically immortal, deeply frustrating him.

In Episode XCVI, Aku, after being informed by a henchman that the former's lair was under attack by an army lead by the Scotsman, decides to deal with them himself and flew out of his lair. Later, he transforms into a colossal giant ball and effortlessly slaughtered most of the army. After this, he was confronted by the Scotsman, with the latter insulting and ridiculing Aku, stating that Samurai Jack inspired many to oppose him. However, this leads to Aku killing the Scotsman by shooting him with his eye beams. Aku, with a bored tone, only wondered why the Scotsman brought up Jack before returning to his lair. However, unknown to Aku, the Scotsman returns as a ghost and instructs his army (who are all of his daughters as well) to continue to amass their forces and find Samurai Jack.

In Episode XCVII, Scaramouche (now only a head) tries to reach Aku in order to tell him that Jack is missing his sword and calls him from a phone booth on the boat he was riding, although Aku immediately hangs up after Scaramouche is thrown off the boat.

In Episode XCVIII, in a flashback, it is shown that Aku pulled Jack out of a time portal just as he was about to reach the past and then obliterated it, taunting Jack by telling him that said time portal was the last in existence. In his rage, Jack tried to destroy Aku once and for all. However, Aku backed out of the fight and transformed the Rams that had been helping Jack into mindless beasts that he soon killed, causing him to accidentally drop his sword into a pit in his horror.

In Episode C, Scaramouche finally reaches Aku's tower and manages to tell Aku about Jack's missing sword, not only causing the demon to snap out of his depression, but also give Scaramouche a new body out of gratitude and both dance in joy. Aku then flies over to Jack's location (in which it is shown that he also killed The Guardian) where he and Scaramouche then laugh at Jack for not having his sword, only to realize that he actually does. Aku then kills Scaramouche by destroying his head and prepares to leave, however, he stops when he realizes that there is a little bit of himself inside Ashi. Aku then has a flashback in which it is shown that he gave some of his essence to the Cult of Aku, and then comes to the conclusion that the High Priestess must have drank the essence and birthed the Daughters of Aku. He then remarks on how she is really a true daughter of his to her and Jack's collected shock and anger. As Jack tries to kill Aku, Aku begins to possess Ashi and forcing her to fight Jack watching from the sidelines as they unwillingly do so while remarking on how his daughter fell for his sworn enemy. Eventually, Aku turns Ashi into a humanoid replica of himself, which Jack cannot bring himself to kill, laying his sword down in defeat. As Ashi is about to lay the final blow, Aku quickly orders for her to stop and grabs Jack's sword. He revels at finally besting Samurai Jack after 50 years.

In Episode CI, Aku broadcasts his victory over Samurai Jack to the entire world. Aku then tells everyone who opposes him that they have no hope as he prepares to kill Jack, however, he soon realizes that he does not know how he wants to kill Jack. After a period of indecision, Aku decides that it is best to let Ashi kill Jack. As Ashi readies to lay the final blow to Jack, almost everyone Jack has encountered (The Blind Archers, Rothchild and his Canine Companions, The Ravers, The Triseraquins, The Spartans, The "Jump Good" Monkey Man and his tribe and The Woolies) and saved came to his aid and attacked Aku. Aku begins to do a great battle with them while Jack fights the possessed Ashi who is stopping him from taking back his sword, Aku finding amusement in the armies' attempts to save Jack since he is nearly untouchable and cannot be killed by them. Aku splats a great number of Woolies and Blind Archers corrupting them into an army of smaller copies of himself ordering them to attack the rebels. While the rebels are in great difficulty against Aku's army and Jack is unable to take the sword back the Scotsman arrives with his Daughters causing several damages to Aku's army. During the fight, Max and the Robots of Andromeda join the army of Jack's friends with their giant robot samurai. At the beginning, Aku mocks the robot only to be brutally beaten up by it and also have his horns torn off, at point Aku starts to get annoyed and furious and decides to change himself into a rain of spikes to kill all of his enemies. The rain kills many of Jack's friends but is stopped by the powers of the Scotsman. Then, he checks on his daughter Ashi to see if she has killed Samurai Jack, but thanks to Jack for showing his love for Ashi, Ashi frees herself from Aku's possession and stands up against him. The furious Aku attacks her but is surprised to see that she has the exact same powers as he does. Without a moment to lose, Jack and Ashi summon a time portal and send themselves back to the past. The future Aku then looks in sorrow as he realizes that his destruction is imminent, realizing that all around him including himself are going to cease from existing.

Back in the past, after Jack's first battle against Aku, the demon has just sent Samurai Jack to the future. After he finishes his speech of meeting him again in the future, he was shocked to see that the future Jack and Ashi have returned on that same spot. As Aku tries to process why he is back so suddenly, Jack immediately charges and begins his short final showdown with Aku. Aku, still greatly weakened by his battle with the previous incarnation of Jack then transforms into a giant rhinoceros beetle-like form to fend him off, but the latter quickly slashes him in two halves with his sword.

Jack then completely destroys one, while the other tries to retreat but does not go very far as Jack manages to stab his severed head with his sword and Aku merges into the sword before Jack slams his sword to the ground, finally destroying Aku once and for all as he and his lair begin to explode; avenging all of the deaths and suffering he has committed (or was going to commit) including pillaging the Japanese kingdom home of the Emperor and Empress and Jack. ending his tyrannical and world domination forever. However, Aku's death came at a price as, since he was responsible for her existence, Ashi is erased from existence as she was about to marry Jack. Jack then mourns the loss of Ashi, but sees a ladybug as a memory of Ashi and smiles, as the string of fate means that he will find someone who will fill the place Ashi left. Now in peace, Jack can live the rest of his life happy and serene, as the past, present and future and the whole space and time seems bright considering that Aku and his tyranny are no longer there.

Samurai Jack: Battle Through Time

In the video game set during the finale of season 5, Samurai Jack and Ashi open a time portal and travel to the past. However, in attempt to prevent his destruction at the samurai's hand, Aku separates Jack and Ashi and transports Jack into a time pocket, a rift of spare and time with no future or past. After facing numerous robots, demons, bounty hunters and the Daughters of Aku once again (involving tormenting Jack in killing the fake Ashi), Aku faces Jack and summons an entire army of robots to destroy him. However, The Scotsman, his daughters, Da Samurai and Sir Rothchild come to aid Jack by facing the army as they give Jack the opportunity to finally face Aku in his fortress. After the final fight, a defeated and overwhelmed Aku is confused of what is happening after a time portal opens. Jack told him that that the rift between space and time that he had created starts to collapse. Future Aku refuses to fail and declared that it's not over. After Jack and Ashi reunite and finally make it to the past, Past Aku meets his end as Jack finally destroys the shapeshifting demon once and for all.

In the alternative ending, due to Ashi did not fade away from existence and finally got married to Jack, rather than what happened in Episode CI, Aku was now forever trapped in the time pocket version of the future and Ashi was already born in this future.


Aku is Evil Personified. The Darkest Soul from the Pit of Hate. To him, all that is good and innocent must be decimated. That is his will, his desire. Here is your truth.
~ Jack describing Aku's true nature to Ashi.

Aku is evil incarnate; he embodies the very essence of an evil overlord. cruel, despicable, uncaring, omnipotent, domineering and authoritative to all he meets, it is obeyed or obliterated with Aku. He is truly arrogant, oppressive, temperamental, destructive and merciless by default, so he has ruled the planet for thousands of years and does not take kindly to disobedience. An example of his cruelty can be shown when an alien prince and princess had crash landed on the Earth and begged for his help because they needed to get back to their planet to stop an invasion; Aku had their ship confiscated and ordered them thrown into a forced labor mine where they would live "miserably ever after" while laughing about it. When their robot companion objected to this treatment, Aku smashed him into the ground without hesitation. The same episode also showed a dog in his castle being tormented by electrocution and whipping for unknown reasons. Although he is extremely treacherous, bloodthirsty, unpleasant, murderous, sadistic, and inhumane, to say the least, he has enough of an understanding of humanity to manipulate their feelings to his advantage. This makes him an even bigger threat as even Jack sometimes falls for his manipulations.

When faced with opposition, Aku takes great joy in slaughtering armies in masses and then burning their homes to the ground as punishment for opposing him. An example was when the Emperor tried to attack Aku but failed due to his weapon being unable to harm him; Afterwards, Aku tied the Emperor to a tree and forced him to watch as he destroyed his kingdom and slaughtered his people. Another notable example was when Aku attacked the Lava Monster's land. Much like the Emperor, the man tried to fight back to no avail since nothing he had could harm Aku. As punishment, Aku encased the man in a crystal prison and forced him to watch as he destroyed his home and slaughtered everyone he loved. Aku then placed the man within a mountain, denying him a warrior's death. He also shows great sadism when tormenting Jack; often losing because he won't kill him instead of toying with him.

Aku takes pleasure on slave labor, having enslaved countless races across the universe. These slaves are often forced to build monuments in Aku's likeness and mine precious resources. When they fail to do so, the slaves are punished terribly and sometimes executed, such in the case of the talking canines. The slaves of Aku's empire often die due to exhaustion and lack of food, only to be replaced with more slaves along the way. Aku particularly enjoyed doing this to great and powerful people such as The Emperor, seeing it as the ultimate insult to have them live the lives of revered and respectable figures, only to spend the rest of their lives as helpless slaves later.

Aku is as intelligent as he is powerful, and his cunning knows little end, from taking the form of a woman to trick Jack or manipulating various races into serving him. He is also extremely dishonest, traitorous, and manipulative, so he has no shame or remorse, and he routinely goes back on his word either to serve himself or simply for amusement.

Despite this, he possesses a dry, yet sadistic sense of humor and often jokes around when in a good mood, mocking Jack whenever he can and however he can. For instance, in one episode Aku holds a time portal just out of Jack's reach as Jack jumps for it. He is also rather "genre savvy", and will occasionally lean on the fourth wall or lampshade either his own villainous tendencies or various cliché situations. He is also a frequent, pervasive, and ubiquitous source of comic relief in the show, due (in prime) to his reactions to the things around him, his outrageous design, and sometimes wise-guy behavior. He also shows some standards as he won't go out of his way to directly kill children. However, this hardly counts as a redeeming trait as he does kill many children during his various attacks.

Speaking of children, while Aku appears to have a soft spot for children at times, this seems to be mostly indicative of his views of seeing immense value in not simply eradicating them, but rather convincing them via various means to view him as the "hero" of the planet and not Samurai Jack, making them useful servants in the future to shape successive generations. This can be seen in Aku's Fairy Tales where he attempted to make children admire him by telling them tales that depict himself as a hero and Jack as a villain. Unfortunately for him, the children weren't impressed hearing his increasingly ludicrous tales, causing him to vanish in rage after roaring "the end". In Jack and the Rave, his follower composed an evil techno music that hypnotizes children, again showcasing his lust to indoctrinate young kids into his evil ways, making them dance for him and commit crimes. Despite this, Aku has committed genocide on countless nations, children included, and he previously sent his minions to kill a young Samurai Jack shortly after the subjugation of his homeland, knowing the threat the son of his former nemesis, the Emperor, would pose to him if left unchecked.

After 50 years during his fight with Samurai Jack, Aku became upset and depressed. Due to the side-effects of time travel, Samurai Jack hasn't aged and cannot die even by effects of old age. He has no interest in fighting Jack and wishes someone else to just kill him.

After finding out Ashi was his daughter, Aku fondly called Ashi "sweetheart" and himself as "daddy", but this choice of words could have been chosen to further upset Ashi and Jack. However, he had no qualms about manipulating his newly revealed daughter into fighting Jack while lamenting that his child fell for his sworn enemy. Aku is fully aware he is evil, but enjoys every second of it, and he especially enjoys making sure others know it. However, because he got created this way, he isn't fully accountable for his actions.

His evil joy returns when he hears Jack lost his sword from one of his subordinates but this is short-lived when he sees Jack has regained it. In that same encounter, Aku realized he had a daughter and rather than being elated at being a father, he callously manipulated his own daughter into attacking Jack, knowing the latter couldn't hurt her. His sadistic nature was again shown as he smiled smugly while watching the two unwilling warriors fight each other and laughs maniacally when he takes full control of Ashi.

Overall, despite his comedic traits and lack of a moral agency, Aku generally proved to be a compelety malevolent being with absolutley no care for anyone but himself regardless of his actions, being the near epitome of Pure Evil in the series behind the High Priestess and The Dominator, and doesn't have so much as a shred of redeeming quality at all. He never truly showed any care or love for his daughters, lovers and minions as he only view to them as mere pawns to his empire. Even while as a Comic Relief villain, he is still taken seriously in-universe as he destroyed and corrupted several innocent lives and destroyed all of Jack's loved ones and home primarily out of his sadism and callous nature, which makes him one of the most evil Cartoon Network villains up to date.

Powers and Abilities

Aku is a powerful demonic entity. He possesses a wide range and knowledge of demonic magical powers, that varies from episode to episode as the series demands. His powers, as shown thus far in the series include:

  • Shapeshifting: Called the "Shapeshifting Master of Darkness" at the opening of each episode, Aku can change into virtually any form that he desires, from a giant dragon to a small insect, or even a beautiful woman. He can also change his size, liquify himself, stretch, and expand his body. Aku's consciousness can exist even in a part of himself. He typically changes into animal forms that are threatening to fit certain situations, such as a scorpion or an octopus.
  • Near-immortality: As a demonic entity, Aku is ageless and nearly immortal. Aku's body is immune to nearly all forms of physical injury. Aku doesn't need to have food, drink, or air and is capable of interstellar travel.
  • Scrying: He also has the ability to spy on Jack through a large magic mirror he can summon at will in his tower.
  • Regeneration: He has immense regenerative abilities. Severe wounds regenerate in mere seconds.
  • Superhuman Strength: When Aku challenged Jack to a so called final match he was shown to have superhuman strength, even in a somewhat human form. With his powers, he was easily more powerful than Jack with Future Aku only losing because he couldn't stop Jack from traveling through time.
  • High-invulnerability: Aku has shown the ability easily withstand weapons of any sort, such as simply absorbing arrows shot at him or not even being fazed after being hit by torpedoes as well as being capable of breathing underwater and existing in the depths of space, however, he was shown to be vulnerable against mystic weapons and the weapons and artifacts of Deities and especially Jack's blade which was forged through the very essence of purity within Jack's father by the Deities Odin, Ra, and Vishnu. Furthermore, when holding back, he is capable of getting hurt from physical attacks.
  • Fire Generation: Along with being capable of breathing fire Aku has also been shown creating it such as in one comical situation he had to re-ignite his eyebrows.
  • Time Travel: This was the very ability that Aku had used to send Jack into the future at the beginning of the series, though so far it has only been used once and was a one way portal forward in time. Aku has the ability to create time portals using his vocal chords. However, due to its side-effect, Samurai Jack cannot be aged even after fifty years. That said, he for some reason, didn't travel through time after Jack did so to kill his past self. This proves that his powers do have limits.
  • Laser Eye Beams: Aku used this ability in numerous battles with Jack and he also used it to destroy the majority of Jack's Kingdom, they are capable of disintegrating living beings, and causing massive explosions.
  • Teleportation: Aku uses this quite often to appear before those he has business with, such as the Imakandi.
  • Summoning Storms: Aku is capable of conjuring storms through will.
  • Conjuration: The ability to create objects out of thin air. He once used this ability to conjure gold, jewels, and treasure for the Imakandi, or creating a new body for Scaramouche.
  • Psychokinesis: Aku has shown the ability to move objects with his mind alone.
  • Sonic Scream: Aku was shown capable of producing a powerful scream that causes massive damage to the landscape.
  • Necromancy: Aku has been shown in one episode to be capable of animating countless dead bodies, and bending them to his will as they have neither mind nor soul.
  • Premonitions: Aku has shown a strong feeling that something is about to happen, especially something unpleasant. In "Jack and the Warrior Woman", Aku had a dream that Jack found a way to return to the past, and realized it was no dream but a premonition, which spurred him into successfully preventing it from happening.
  • Corruption/Possesion: Aku is able to infect others with his evil, turning them into monsters or demonic versions of their former selves that carry forth his will.
  • Curses: Aku is able to put various curses on people or objects, such as when he put a time travel curse on Jack and the Lava Monster with immortality.
  • Elemental Control: Aku is able to control the elements in a variety of ways, such as creating thunderstorms, raising stone walls from the ground, or breathing fire.
  • Doppelgänger Creation: Aku can create evil clones of others, such as when he created Mad Jack.


Despite his immense proficiency in dark magic and sorcery, Aku has some weaknesses. These include:

  • Shape-shifting Limitations: Regardless of the form he takes, Aku appears to be limited to the specific color scheme of red, green, and black. Furthermore, if his reflection is seen, it will always reveal his normal form regardless of the guise that he takes. This is most noticeable when Aku takes the disguise of a hermit, and accompanies Jack to look for the artifacts of the gods. When Jack and Aku are in the swamp, Aku's normal form was apparent in the water's reflection even while in his hermit disguise, so he splashed the water and used the ripples to hide his reflection.
  • Divine Magic & Artifacts: He can be harmed and subdued by any object or form of magic wielded by the gods Odin, Ra, and Vishnu. This also includes weapons forged using divine energy or essence, such as the Emperor's (and later Jack's) Samurai Sword. This weakness leads to his ultimate demise in the series finale.
  • Infectious Disease: In one episode (XLIII), he appears to have contracted a form of illness not unlike the human flu or common cold. Whether or not this was the result of a conventional infection, or the product of some supernatural equivalent, remains unknown.
  • Spirit and Righteousness: According to one of the three gods, Rama, The strength of the Human Spirit and Virtue of Human Righteousness can allow Aku to be vanquished. Jack's father's magic sword can harm Aku as it burns him and negated his regeneration. The Scotsman music imbued powers in his spirit form was able to affect Aku and also the giant robot samurai of the robots of Andromeda was able to hurt him and also tear off his horns.
  • Time Travel: Despite capable of opening a time portal to the future once, for some reason he is unable to travel through time. This can be seen when Ashi opens a time portal to transport herself and Jack to the past, he didn't open his own time portal to give chase and prevent them from reaching the past, but instead became fearful as he is aware that his death was certain.


Once again, I am free to smite the world as I did in days long past.
~ Aku after being released from his imprisonment.
Not this time.
~ Aku before capturing Jack's father, The Emperor.
Who dares to summon the Master of Masters, the Deliverer of Darkness, the Shogun of Sorrow, Aku!?
~ Aku officially meets Jack for the first time.
Fool, no mortal can hurt the great Aku.
~ Aku gloats.
That sword. I remember that blade. I recognize your blood. You are the son of the fool who imprisoned me those many years ago. No matter, neither he nor the sword had the power to slay me forever, and neither do you!
~ Aku recognizes Jack's sword.
You might have beaten me now, but I will destroy you in the future.
~ Aku to Jack.
I disagree.
~ Aku before flinging Jack to the future.
You will be allowed. The oceans of Aku will be your new home. But you will pay homage to me by constructing statues in my likeness. Once a month, a monolithic tribute will rise from the depths of the ocean to remind all who is the master of this world. Now begone!
~ Aku showing his tyranny.
HA! HA! HA! HA! So fate has arrived. Many years have gone since that day. And now my formidable foe, you will pay for my pain in the past with your pain in the future. HA! HA! HA! HA!
~ Aku realizes that Jack has arrived to the future.
He is stronger than I remember. But no matter. For you see, little Samurai, the world is mine! My eyes and ears are everywhere, nothing you do will go unseen! Quest as you may, but we will meet again when I see fit, in a time and place of my choosing! And it is I who shall put an end to the war started in that age long past, Samurai Jack! Bwa-ha-ha-ha!
~ Aku vows to defeat Jack.
For eons I have terrorized this land. Every miserable creature trembled at the mere mention of my name. The pitiful people fright before my awesome power. But now, I am openly mocked by these measly urchins. Tales of the Samurai's heroics have spread through the world like a virus, but I will cure the world of this plague of hope. I will unleash such evil that even the most innocent soul will be consumed by terror!
~ Aku attempts to convince the children that Jack is evil.
As far as the eye can see, the land is desolate and full of despair. Shadows crawl across the Earth and block out the light. Darkness oozes from every crevice. Hope has been eradicated. Only terror reigns. Yet, there is one that mocks my omnipresent evil with his existence. He possesses a sword which could destroy me. They call him... Samurai Jack! Despite my efforts, he has not yet been destroyed. But now I, Aku, dark lord of all darkness will make the final move and annihilate Samurai Jack forever. From deep within The Pit of Hate, I summoned: Demongo!
~ Aku summons Demongo.
You are one of my most powerful Minions. You possess the ability to steal the essence of the mightiest of warriors or the deadliest of beasts. You have never failed me.
~ Aku orders Demongo to kill Jack.
Haha! Yes, I can hold... Yes... I would like to place an order for delivery... Aku... I think I'm in the computer... Yes, that's it! I'd like a large-- What? Huh?... Extra thick!... 30 minutes or it's free - EXCELLENT! HAHA!
~ Aku ordering a henchman to kill Jack, which sounds exactly like how someone would order a pizza.
Aw, put that thing away, samurai. We all know what's going to happen. You'll swing your sword, I'll fly away, and probably say something like "I'll be back, samurai!", and then I'll flutter off over the horizon and we won't see each other for about a week, and then we'll start the whole thing all over again.
~ Aku in Jack vs. Aku.
You! thank you.
~ Aku's first words after being given life by Jack's father.
Fool! Nothing of this world can harm me. For I am Aku, the Shogun of Sorrow, the Deliverer of Darkness, your new master. And you will bow to me."
~ Aku gloating Jack's father after he tried to attack him.
Have you learned nothing? Your mortal blade cannot harm me. AAAAAAAAH!! How could this be?!
~ Aku to Jack's father before and after his sword hurts him.
~ Aku after being sealed by Jack's father.
Who dares to summon? Oh, it is you. (Don: Ah yes uh, you see uh-) Do you forget that you are forbidden to come here? (Don: Uh yeah, boss, I know. But uh...this time we uh, we really got something. Something big, see?) What can you possibly have that the almighty Aku cannot attain? (Don: The Jewel of Neptune. *opens box revealing the Jewel of Neptune*) What? It cannot be! The power to control all the water of the world! (Don: Only for you, my lord.) Yes, it truly is the magical jewel...But how did such an elusive treasure come into your possession? (Don: Well, it wasn't easy, master. But we got a little help from our newest member. Come on out, Jackie.) Jackie? (*Jack then steps in* Jack: Actually, it's Jack.) You!
~ Aku after gaining the Jewel of Neptune and discovering the Gangsters new member is in fact Samurai Jack.
Stop! Look at what you're doing. You're getting yourselves all over the floor. I just had it vacuumed. Out! Out! Get Out!
~ Aku to the Mud Aliens.
And I care because?
~ Aku doesn't care about Jack anymore.
Oh! That was the old Aku. This is a new Aku. And he really doesn't care about that pathetic Samurai who wander around like a mad fool. Haha! It's hilarious. Really. Look, I'll tell you what? You want to destroy him? Go ahead! Who cares? I certainly don't. Not one bit at all.
~ Aku tells the scientists that he doesn't care about Jack anymore.
The "psychiatrist": So, tell me what's been bothering you.
Aku: Well, you see, doc, it's been over fifty years already.
The "psychiatrist": It's been that long?
Aku: Yes, you see, that's the actual problem. Once I eradicated all the Time Portals, I thought I would just wait it out and then, the Samurai...
The "psychiatrist": We don't say his name here, it is a safe place.
Aku: Yes, sorry, doctor. Well, I just assumed that eventually over time, he will just...
Both: DIE!
Aku: But he hasn't even aged. I mean like at all! He just grew that stupid beard, and looks like he'll be here forever! I...I just don't know if I can handle that.
The "psychiatrist": Yes, it seems that the initial time travel has affected the aging process. It's quite the conundrum.
Aku: Yes, what is that again?
The "psychiatrist": Just a confusing or difficult problem.
Aku: Yes, problem. I wished there is someone who can dispose of my problem.
Both: Yes, one can hope.
~ Aku's discussion with the "psychiatrist" (who is actually a fragment of himself) about Jack's non-aging status.
Would somebody please... STOP ALL THAT NOISE?!
~ Aku hearing some attacks outside his tower.
Perhaps annihilating this scum will break me out of my... malaise.
~ Aku assumes that go out and fighting would make him no longer bored.
Better to make it a COMPLETE annihilation.
~ Aku.
Ah, why did he bring up the Samurai? Ughhh!
~ Aku annoyed at Jack being brought up by Scotsman
Oh, fun fact: That was the last remaining time portal in existence.
~ Aku after destroying the last time portal.
Oh-ho! Not so fast, samurai! I know better than to mess with that sword! But before I go, I leave you someone to play with.
~ Aku before leaving Jack for 50 years to come.
But you're probably saying to yourself: (Imitating Jack's voice) Why? Why now for a sudden reunion?
~ Aku meets Jack again.
I smell ME!
~ Aku realizing Ashi.
To all those fools who dare oppose me, your hero is dead! YOUR HOPE IS DEAD! I am the one true master! Let this be a lesson to all! Time to die, Samurai Jack!
~ Aku is going to kill Jack.
Ha, ha, ha, ha! You're nothing but insignificant insects to Aku! And insects get SQUASHED and exterminated!
~ Aku laughing at the rebellion army.
How dare you talk back to your father!
~ Aku when Ashi turns on him.
Oh no.
~ Aku realizes his end as Jack escapes to the past.


  • Aku's name translates to "evil" in English. The kanji is written as "悪", which can also be pronounced as "Waru". Aku may also be named after Akuma, an evil spirit with burning eyes in Japanese folklore who is said to bring misfortune upon those who see it.
  • Genndy Tartakovsky originally planned to finish Jack's and Aku's story with a theatrical feature-length film based on the series. However, the idea was abandoned after several delays and changed for a fifth season.
  • In the Brazilian Portuguese dubbed version, his name was changed to "Abu" after the studios realized that "Aku" is related to offensive nicknames such as "buttocks" or even worse.
  • Aku's eyebeams were originally yellow in Season 1 and 2, but are white in later seasons and then red in Season 5.
  • In recent years, Aku has been subject to an Internet meme based on a scene (particularly in Episode XLVIII), where he is apparently ordering a large pizza, but actually a bounty hunter, in which he says the line before hanging up. The meme typically revolves around Aku calling things "extra thick", which is purposely misspelled in the title of the videos as E X T R A T H I C C.
  • In episodes like The Premiere Movie and The Birth of Evil, Aku is significantly more evil and sinister than any other episodes (ie: Aku's Fairy Tales and Jack versus Aku), as both episodes detail just how brutal and inhumane Aku can be at his absolute worst. To reason behind this is because both episodes showcased Aku in his prime, a time where Aku was bent on ruling the world with an iron fist. After he has succeeded in doing so, Aku increasingly becomes more mellow due to the fact that no one has the power to stop him, and as a result, appears less evil than he actually is.
  • Despite his comedic tendencies, Aku is easily one of the most evil and immoral Samurai Jack villains, as he has destroyed and enslaved entire nations, tortures innocents for fun, starved Jack's father (and possibly many other slaves of his empire) to death, commit genocide on a daily basis, sends millions to work in labor camps presumably until death, and has taken away the free will of everyone across the universe, merely because the suffering of others amuses him. Of course, this is actually very fitting, as Aku is the embodiment of all that is evil.
  • Although it took Jack well over 50 years in order to go back to the past in order to finally kill Aku, from Aku's perspective, it seemed like he accidentally sent Jack a mere 14 seconds into the future and returned with a woman he didn't know was one of his future daughters.
    • Despite being surprised of Ashi having the exact same powers as he does, it was a mistake for Aku to give his essence to the Cult of Aku and passed down all his powers, along with the ability to open a time portal, to his own daughter by using corruption magic.

External Links


           SamuraiJack Logo.png Villains

Black Mass
Aku | Demongo | Scaramouche the Merciless | Jack-Aku | Mad Jack | Minions of Set | The Gentleman | X-49 | DJ Stylbator | Imakandi | Pig Sheriff | Cult of Aku (High Priestess & Daughters of Aku)

Guardian | Demonic Spirit | Lava Monster | Huntor | Chritchellites | Cronus | Gordo the Gruesome | Josephine | Lazarus-92 | Omen | The Dominator

           Villainous logo.png Villains

Black Hat Organization
Black Hat | Dr. Flug Slys | Demencia

Yukito Pappeto | Hatbots | Black Hat's Clone | Earl | Monstrous Black Hat

Penumbra | Haunted Orphanage Van Deer (Emilia & Ghost Children) | Lady Bonnivet | Dark Phantom | Metauro | Mawrasite | Ghoul | Dr. Valeria Rapture | Chimera | Miss Valdoom | V.I.R.U.S. | Aldo Maldonado | Wobolick | Illuminarrow

Other Villains
Black Hot Organization
Black Hot | Dr. Flex | Dolencia | 6.0.6.

Criminals and Monsters
Miss Heed | Heart-Cam | Miss Heed's Followers | Coyote | Pirate | Loss Tornado | Mascara Macabra | Flower of Pure Foulness | The Witch | Subject 141 | Roxette

Father | The Delightful Children From Down The Lane | Hunson Abadeer | Earl of Lemongrab | Lord Boxman | Rob | Aku | Vilgax | Anti-Pops | HIM | Mojo Jojo | Grandfather | Peridot | Jasper | Perfectionist | Strike | Cacao | Red Guy | Cosma | Grim | Nergal | Bag-Headed Cashier | Hector Con Carne | General Reginald Skarr | Major Doctor Ghastly | Eris | Other Cartoon Network Villains

           Cartoon Network 2010 logo.svg Villains

Code Lyoko
XANA | William Dunbar | Men in Black | Scyphozoa | Laura Gauther

TV Movie Villains
Albadon | Astaroth | Troy Adams | Steve | Big Rob | White Diamond | Spinel | Sonny Appleday | Grandfather | Father | Senior Citi-zombies | Agent Trout | National Wildlife Control

Crossover Villains
Lord Fuse | The Announcer's Remote Control | Delightful Reaper | Alpha | Strike

Sym-Bionic Titan Villains
General Modula | Galalunan Commander

What A Cartoon!
Yuckie Duck | Sledgehammer O'Possum | Dogg | Big Bad Wolf | Wind Up Wolf | Luther | Fox Chef | French Chef | Tumbleweed Tex | Noof | Mad Bomber | Reilly | Blammo the Clown | Boid | Aliens

Dexter's Laboratory
Mandark | Quackor | Crazy Robot | Badaxtra | Hookocho | Lalavava | Comrade Red | Mental Mouse | Huntor | Peltra | Simion | Orgon Grindor | Dynomutt X-90

Cow and Chicken
Red Guy

¡Mucha Lucha!
Queen Voladora | Monster of San Luis Rey | 6-Armed Monster | Carlton Cold Jones | Heavy Traffic | Primadonna Hodges | Cindy Slam | Potato Patata Jr. | El Perrito | El Custodio | El Dolor De Kurtz | El Evil Cheese Grande | El Evil Dentista of Doom | El Haystack Grande | Coco Demento | El Maléfico | El Pared | El Toro Amarillo | Esteban | Futboloco | Mask Savages | Masked Toilet | Mysterioso Grande | Mr. Fishy Fish | El Oscuro Invasor | Rick O' Shea | Private Reinhardt | Queen Voladora's Mummified Mommy | Slurf | Timmy of a Thousand Masks

I Am Weasel
I.R. Baboon

Ed Edd n' Eddy
Kevin | Sarah | Kanker Sisters | Belly Button Eater | Eddy's Brother | Ed's Hallucinations | Lemon Brook Lumpers | Mole Mutants | Edzilla | Prank Master

The Grim Adventures of Billy & Mandy
Grim | Mandy | Nergal | Eris | Mindy | Sperg | Bogeyman | Jack O' Lantern | Pinocchio | Geppetto | Cthulhu | Morg | Bunny | Delightful Reaper | Bun Bun | Pan-dora | Hoss Delgado | Hector Con Carne | General Reginald Skarr | Brain-Eating Meteor | Mask of the Beast | Lord Moldybutt | Darold | Major Doctor Ghastly | Lionel Van Helsing | Nancy Claus | Estroy | John Jack Daniel Torrance | Wiggy Jiggy Jed | Yaap Yaap | Triceratron | Clowns | Lord Pain | Professor Death Ray Eyes | New Mandy | Super Chicken | Dreadbots | Arachnotaur | Velma Green the Spider Queen

Edgar & Ellen
Edgar and Ellen | Pet | Stephanie Knightleigh

Krypto The Superdog
Mechanikat | Snooky Wookums | Delilah | Bud and Lou

The Life & Times of Juniper Lee
Auntie Roon | Auntie Roon's Minions | Loki | Thor | Demoness | Jonathan | Kai Yee | Lex | Sandman | Vikki Devvyne | Taylor Evermore | Wrongness

Foster's Home for Imaginary Friends
Terrence | Berry | Duchess | Extremesaurs | Kip Snip | Lord Snotzax | Lil' Lincoln | Nemesis | Omnizot | Wild Mac | World

Hi Hi Puffy AmiYumi
Axel & Rod Skidmark | Eldwin Blair | Mr. Darrell | Mr. Master | P.A.L. | Rumaki | Sunekura | Sauerkraut Malone | Julie

Camp Lazlo
Scoutmaster Lumpus | Edward Platypus | Commander Hoo-Ha | Ms. Mucus | Edward's Brothers | Chip & Skip | Gretchen | Meatman | Timmy and Tommy | Cousin Sinkbug | Aliens | Clowns | Conjoined Pigs | Beastly Bumblepuss | Cheese Obsessed Canadian Trouts | Elebug | Lake Monster

My Gym Partner's a Monkey
Bobby Lion | Bull Sharkowski | Chad | Euripides Sharkowski | Larry Raccoon | Lola Llama | Possum Girl | Principal Wolverine | Rick Platypus | Mr. Cheetah | The Spiffies | The Ferals | Ted Oxpecker

Miss Endive | Gorgonzola | Reuben | Chestnut | Funjl | Meaches | Gumbo | Mr. Fugu | King of the Sky | Sour Ron | Kevin | Frank | Scary | Puckerberry Overlords | Sour Wife | Rosemary | Cinnamini Monster | Weirdos | Frau Broten | Florentine | Jeffrey | Peking Duck | Jam | Mr. Samball | Robert Limburger | Pepperjack | Flendive | Crazy Fruit | Meanie Cream Cake | Mold Pixie | Steve | The Teriyaki Triads | Roquefort | Ms. Butterscotch

Johnny Test
Bling-Bling Boy | Wacko | Mr. Mittens | Brain Freezer | Zizrar the Mole King | The Beekeeper | Dark Vegan | Bumper Randalls | Road Burn | Mutant Agents | Miss X and Miss Z | Robot Johnny & Dukey | Evil Johnny | Sissy Blakely | Blast Ketchup | The Tickler | Moon Fiends | Lunch Lady | Mr. Henry Teacherman | Monty Butterworth | Fluffybuns | Dr. Swampbrain | King Fufassel

The Secret Saturdays
V.V. Argost | Munya | Argost's Army | Rani Nagi | Zak Monday | Doc Monday | Drew Monday | Fiskerton Monday | Zon Monday | Abbey Grey | Baron Finster | Francis | Shock Troopers

The Mr. Men Show
Little Miss Naughty | Little Miss Scary | Mr. Stubborn | Aliens | Mr. Metal | Sea Monster | Snow Monster

Hero 108
High Roller | Sparky Black | Sparky White | Chameleons | Eagles | Whales | Zebra Brothers | Bounty Hunters | Chiung Ming | Cocky Aliens | Commander of Darkness | Flying Fish | Infinitum | Komodo Dragons | Minotaur King | Moosie Ghostface | Red Seahorse Prince | Shadow Monster (entity) | Soil Monster | Soldiers of Darkness | Spotter | Stone Monkey Deity | The Object-Morphing Demons | Tri Puppy | Twin Masters | Wolf Eels | Seahorse Prince | Blue Seahorse Prince

Nixels | Major Nixel | King Nixel | Nixel Guard | Nixie | Painted Nixels | Slap Nixel | Tentacle Nixel | Muscle Nixel | Boomerang Nixel | Cannon Nixel | Boxing Nixel | Catch Up Nixel

We Bare Bears
Nom Nom | Dave | Ralph | Barry Charles | Wolves | Cory | Ari Curd | Andrew Bangs| Barry's Robots | Techies Club | Pigeon Cartel | Ragtag Kids | Saanvi Patel | Homewrecker | Kyle | Pet Shoppe Owner | Lewis | Lucille | Mad Scientist | Agent Trout

The Looney Tunes Show
Cecil Turtle | Yosemite Sam | Elmer Fudd | Marvin the Martian | Wile E. Coyote | Sylvester | Taz | Daffy Duck | Henery Hawk | George P. Dog

New Looney Tunes
Yosemite Sam | Ivana | Rhona Roundhouse | Carl the Grim Rabbit | Elmer Fudd | Marvin the Martian | King Thes | Cal | Jack | Eagle Scout | Hazmat | Count Bloodcount | Sir Littlechin | Computer Virus | Winter Stag | Krakos the Polar Bear | Scarecrow | Vera the Vulture | Ninjas

Mighty Magiswords
Queen Porcina | Morbidia | Gateux | Phil The Pilefer | Glori | Nohyas | King Rexxtopher | DeBizz | Helmut | Manfish the Fish Man | Frostferatu | Brocoli Dumplin Kids | Brotherhood of Thieves | Francis Thingshooter | Naso | Birda | Purrlance | Mr. Flumooks

Over the Garden Wall
The Beast | Adelaide | Evil Spirit | The North Wind

Belson Noles | Balance | Brenda Shoop | Joshua | Mildred | Cooter | Malakevin | Carol Moody | Mr. Noles | Seabass

Uncle Grandpa
Pizza Steve | Aunt Grandma | Cheesepuff Mike | Bottom Bag | Chinease Take Out Delivery Guy | Christopher Columbus | Cloud Wizard | Curly | Emperor Krell | Evil Forces Shadow Guy | Foreign Madman | Free Sample Elves | Galaxy Guardians | Gary | G-Dog | Gornak | Green Alien | Jimmy | Kevin E. Peepants | Kid Cousin | Larry | Leo | Lexus, Lisa, & Lori | Moe | Mouse | Mole People | Moon Man | Mud Goblins

Generator Rex
Black Knight | Van Kleiss | The Pack (Biowulf , Breach , Skalamandar, Bouncer, I-Bol & Circe ) | Consortium

Annoying Orange
Broccoli Overlord | Broccoli Minions | Grapefruit | Big Rock Candy Monster | Teddy Juicer

Apple & Onion
Beef Jerky | Cheesesteak | Duck | Maritimers (Crab Cake, Tempura Shrimp & Tuna Can)

Summer Camp Island
Basketball | Jabberwock | Jeremiah

We Baby Bears
Madame Malin | Madeline | Craig | Dashiel | Francis | Mayor Centipede

See Also
Adventure Time Villains | Ben 10 Villains | Courage the Cowardly Dog Villains | Craig of the Creek Villains | Infinity Train Villains | KND Villains | OK K.O Villains | Powerpuff Girls Villains | Regular Show Villains | Robotboy Villains | Samurai Jack Villains | Steven Universe Villains | Teen Titans Villains | Teen Titans Go! Villains | The Amazing World of Gumball Villains | Total Drama Villains | Victor and Valentino Villains | Villainous Villains

Dominic Greene
Chase Young
Benjamin Willis
Randall Flagg
Alex DeLarge
Count Dracula (book)
Jerome Valeska
Lord Shen
Bill Cipher
Tate Langdon
Oogie Boogie
Dr. Venom
Krampus (Krampus)
Santánico Pandemónium
Judge Doom
Scorpion (MK)
Gendo Ikari
Victor Krane
Napoleon (AF)
Tony Montana
Candyman (CM)
Skeletor (MotU)
Immortan Joe
Walter White
Tom Cat
Count Orlok
King Dedede
Emperor Palpatine (SW)
Homelander (comics)
Vote Now!