InuYasha the Movie 3: Swords of an Honorable Ruler

is the third InuYasha movie. It was released on December 20, 2003 in Japan (between episodes 136 and 137) and in the United States on September 6, 2005.

An additional title is Swords of Supreme Conquest.

Summary
On a snowy night of 1297 at the beach, blood drips from the left hand of Tōga. His son and heir, Sesshōmaru, asks his father if he insists on going and asks for his two swords, Tessaiga and Sō'unga. But his father asks if he desires power so much, he must have someone to protect; Sesshōmaru says no, as he has no need for such. His father then transforms into his true dog form, running off.

At a mansion, guarded by many samurai, their leader, Takemaru of Setsuna, coming to the birthing chamber ignores the midwife's warnings and takes his spear, killing the midwife. At the birthing chamber, Izayoi who is just giving birth to his second son whose calling "my dearest" to Tōga. While Tōga is on his way to the mansion, Myōga, clinging near his right eye, pleads his master to reconsider, for his wounds from his battle with Ryūkotsusei have not yet healed, but the Tōga refuses, as he cannot afford to lose his human wife, and that he doesn't believe he is long for this world.

Back at mansion, Takemaru approached the birthing chamber as he observed to the moon that the night of the lunar eclipse begins which he's ready to slay a demon. As he entered the chamber, Izayoi surprised that he came and she orders him to gather the men standing guard outside and leave the grounds at once, she fear there's no one who's strong enough to challenge him. He tells Izayoi, that he had always loved her but loathes the fact that "her heart has been stolen by a demon" and stabs her with a spear. As he leaves, he tells her that his feelings for her will never change, and she reaches out to the window while observing the lunar eclipse and Tōga on the cliff observe the mansion telling her that he's coming for her. As the moon darkens, a half demon was born and when Takemaru coming back to the gate, he hears the cries of a newborn half demon.

At that moment, the Tōga arrives at the gate, using his Kaze no Kizu by the Tessaiga to cut through the lines, despite being hit by a few arrows. As Takemaru tells Tōga a little late, causes him to surprise and hearing that he slew Izayoi, he slices off the samurai's left arm and enters the mansion, just as Takemaru summons his men to set it aflame with Tōga and the rest inside. Inside, Tōga finds Izayoi and uses Tenseiga to revive her, and covers her with the Robe of the Fire-Rat to protect her from the fire. Takemaru then approaches, as Tōga draws his third sword, Sō'unga and Takemaru determined to fight to the death tells him to let them journey together into the netherworld. Tōga tells Izayoi to live long and give his second son's name Inuyasha, Takemaru asks him what's Tōga talking about, he answered "the infant's name" as their son shall be called Inuyasha, Izayoi agreed, calls Inuyasha as Tōga tells her to get out and she leaves. Tōga produce the Dragon Twister to battles Takemaru as the mansion collapses on them. Izayoi, holding her infant son, escapes as Tōga's voice tells her that she must survive, live a long life, live long and well with Inuyasha.

During the opening credits, Kagome spends the day in the Feudal Era, and she went back to the modern era for a bit of break as she rushed to school. At the volleyball field at school, Kagome and her friends playing volleyball, but then Inuyasha, who had followed Kagome to the present to make sure that no harm comes to her as she realized that Inuyasha came. At Higurashi storehouse in the Higurashi shrine, Sō'unga is found to be a secret treasure of Kagome's family. On their way to Kagome's home she asked Inuyasha why did he come to her school, he answered that he didn't want anything happen to her, but she assures him in the future there are no demons. She tells him that she's playing volleyball, which reminds Inuyasha as a Kemari ball game, so he remembers as the others don't let him to play and walked away after one of them threw. As he approached to his mother, he first saw his mother's tears Suddenly, the sword flies off to find the nearest demon, finding Inuyasha, who had followed Kagome to the present to make sure that no harm comes to her but she assures him in the future there are no demons. Sō'unga's sheath, Saya, says that Inuyasha must master the sword before it destroys the modern world. But instead, it takes possession of his arm and Inuyasha manages to convince it to return to the past.

Shippō saw the pink light, along with Miroku, Sango, Kirara, and Myōga as he said "it can't be. That's impossible." and the Tenseiga is shaking as Sesshōmaru looked at the light of Sō'unga that it came from the Bone-Eater's Well as Rin asked that is something the matter and he smiled and Jaken was shocked. Emerging from the Bone-Eater's Well, Sō'unga causes Inuyasha to revert to his demonic nature and attack a nearby village. Miroku and Sango stop him from hurting anyone as the villagers evacuate themselves. Inuyasha unleashes the sword's Dragon Twister, which is more deadly than the Backlash Wave, wreaking a huge amount of destruction, though Miroku and Sango avoid this on Kirara. Inuyasha then wanders off to rest whilst the sword is out of energy. In the meantime, Kagome returns to the past with Saya, as Kagome was shocked to the village that Saya said Inuyasha used the Dragon Twister, that it makes Shippō to surprise until who Myōga knows him.

Sō'unga brings Inuyasha to the territory of ogre demons, and slays three. Sesshōmaru continue walk as Jaken tries to catch up and tells him to slow down until the Tenseiga is shaking again that the Sō'unga is nearby, but he catch the scent of his brother. Kagome and company later come upon them but the corpses awaken as the walking dead. Slashed, some parts still move and they are filled with miasma, which Miroku finds out when he sucks one in with his Wind Tunnel. Saya advises they use fire but Shippō's Foxfire is too weak so Kagome purifies them. Only one orge leaves the skirmish.

Inuyasha soon meets up with Sesshōmaru, who is disgusted that the Sō'unga came into his possession. As the brothers do battle, whenever their blades clash, Sō'unga knows Sesshōmaru's every thoughts, especially that Inuyasha cut off his left arm. It evens taunts him, saying that if his father had listened to him, he wouldn't have met a miserable fate. Sesshōmaru grabs Tessaiga and uses the Kaze no Kizu in an attempt to silence the sword, severely burning his hand, but Inuyasha and Sō'unga survive. The sword, now angry, wishes for more blood and prompt Inuyasha to attack Rin and Jaken. but, before he was able to hurt them, Kagome told him to sit.

Kagome meets up with Tōtōsai, who also knows Saya. He explains that Sō'unga is a sword possessed by the spirit of an ancient evil demon. She uses her "sit" command to hold Inuyasha and grabs him, just as Sesshōmaru tries using his poison claw. Sō'unga flies away and the enchanted beads scatter. Leaving an unconscious Kagome behind, a guilty Inuyasha then goes off on his own to destroy the sword.

The undead ogre demon finds Sō'unga and attempts to pick it up but instead becomes its host. It goes into the netherworld and retrieves Sesshōmaru's left arm before coming to the gravesite of Takemaru. Calling out to Takemaru's forgotten soul, it promises revenge against Tōga by killing his sons. So Takemaru's eyes glowing red and his skeleton body glows and comes out of his grave as the dirt comes to his skeleton body into the skin.

Elsewhere, Kagome awakens and finds that Rin and Jaken are with them, having been abandoned by Sesshōmaru. The old demons decide to tell the whole story concerning Sō'unga. After Inuyasha's father died, they were to undertake instructions according to his will; Myōga placed the Tessaiga in the master's remains and hid it in the Black Pearl; Tōtōsai made sure that Tenseiga was passed to Sesshōmaru; however, Saya said there were no instructions for Sō'unga. They couldn't give it to Sesshōmaru for he would kill them for giving him the previous sword, and Inuyasha was only an infant. Saya then proposed to hold the sword quietly for at least seven hundred years and have it thrown into the Bone-Eater's Well. Now the only way to defeat Sō'unga is for both Inuyasha and Sesshōmaru to join forces but many seriously doubt that that will ever happen.

Meanwhile, Takemaru is resurrected and given the left arm to use the Dragon Twister. As he grasps the sword, he is given a demonic appearance, with Sō'unga's spirit represented as a purple smoke. When the normal armies coming back to castle, the commander felt surprised that Takemaru is at the gate and he slays entire armies and an entire castle and using Sō'unga, he felt the arm doesn't follow his instructions as well as he might have liked.

Both the brothers arrive at Takemaru's gravesite and Sesshōmaru decides since Inuyasha is unaware of the human's connection to Izayoi, he will die ignorant causing the two to draw swords against each other. Inuyasha tells his brother that since Tessaiga's barrier rejects him, he can't even pick it up, whilst Sesshōmaru would prefer the pleasure in killing the half-breed whose father's blood flows in his veins. Inuyasha then protested that he would destroy Sō'unga, however Sesshōmaru retorted that he doesn't even know what their father looked like. Inuyasha attempted to use the Backlash Wave against Sesshōmaru but he repelled it with his Dragon Strike. However, Inuyasha was protected by Tessaiga's sheath, prompting Sesshōmaru to leave.

Takemaru resurrects at least two thousand soldiers, making them his army of the undead. Kagome's group faces them in a titanic battle, with Inuyasha and Sesshōmaru also joining in on their own. Takemaru has one of the undead grab the Tenseiga, attempting to destroy it with gunpowder but it fails and the sword flies off. Rin finds it, but the undead ogre demon grabs her and Kagome and takes them to Takemaru, prompting Sesshōmaru and Inuyasha to follow. Sō'unga tells Takemaru that the girls are no different than Izayoi and the samurai proceeds to try and kill them, for those who consort with demons are all Izayoi in his eyes. Kagome is partially protected by Sō'unga's sheath and Rin is confident that Sesshōmaru will save them, which he does. The girls try to run, but their path is cut off by the ogre. It grabs Kagome, causing the enchanted beads to fall from her pockets. Rin throws one of them at it, disintegrating its head.

Outside, the others tells Inuyasha to rescue Kagome while they hold off the soldiers. But there are so many that many of their fire users got exhausted. Miroku uses his last resort: his Wind Tunnel, despite the danger to his body, sucking in all of the dead and becoming severely weakened.

Kagome tries throwing one of the beads at the headless ogre body but misses, however Inuyasha arrives and slices it in half. Kagome and Saya tell Inuyasha to join forces with Sesshōmaru to overcome Sō'unga's Dragon Twister but he refuses and runs off. Sesshōmaru fails in using Tenseiga to slay Takemaru, who is just resurrected by Sō'unga. Inuyasha then attempts to hit both of them but misses. Takemaru remarks that the half-demon looks like Izayoi and informs him of his part in her death. As they clash blades, Inuyasha is able to push Takemaru back. The latter and Sō'unga are bewildered at what they are seeing, for such power is impossible for a demon; Inuyasha retorts that he's half a demon and his human desire to protect someone is increasing his power and pushes Takemaru through a wall. Takemaru then has an epiphany that when Izayoi wanted him to leave, then he realizes that she was trying to protect him. He murmurs that he'd always loved her as his horn falls off and his flesh erodes, leaving only his skeleton. Sesshōmaru then slashes at the imps trying to resurrect him.

However, Sō'unga isn't finished. It causes the castle to collapse, crushing Takemaru's remains and creates its own body with the arm attached, opening a portal to the netherworld. Once the boundary between both worlds vanish, every living thing will wind up dead. Saya puts up a barrier to protect the nearby humans from being overcome by the dead souls from the netherworld, calling out to the living.

Inuyasha and Sesshōmaru battle with Sō'unga, each wanting to defeat the evil sword themselves. Kagome tells them to work together but they don't listen so she tries to purify Sō'unga but nearly gets killed. Inuyasha gives her his sheath to protect her as he tries to use the Backlash Wave to stop the Dragon Twister but it barely works. Sō'unga believes that he finished off the half-demon and turns to Sesshōmaru but Inuyasha gets up and uses the Backlash Wave again. Sesshōmaru remembers when his father asked if he had someone to protect and has short flashbacks of Rin and Jaken. Despite this, he stoutly claims he has no one to protect and combines his Dragon Strike with the Backlash Wave, overcoming the Dragon Twister and destroying Sō'unga's body, casting the sword into the netherworld.

Tōga then appears, saying he's proud of them for sealing Sō'unga forever as the portal closes. Myōga claims the master wanted his sons to work together. Kagome asked what does he mean. Saya answered that the only chance to seal Sō'unga, the Sword of Calamity, was when the gateway to hell appeared. Myōga that's because of Tessaiga and Tenseiga combined their power for the very first time. And Saya said that his master believed it all along, but they find that ridiculous. As Sesshōmaru and A-Un leaves, Rin and Jaken have to catch up. The other old demons ask Saya why he didn't speak up sooner if he heard the master's last wishes; he claims he was just thinking of what's best for the brothers; but the truth is he really forgot. Kagome tells Inuyasha that his father seemed like a kind man, she asks that he's happy to meet him, he answered "not really", and they see s.

In the post-credits, Kagome thought that Sesshōmaru don't like humans, and don't know why Rin is with him. Then she tricks Inuyasha into putting back on the enchanted beads as a surprise, which she had managed to put back together thanks to Rin who collected all of its scattered beads, and in a soft tone of voice tells him to sit, as seen the flowers blows as Inuyasha hits the ground, ending the film.

Trivia

 * The details concerning the death of Tōga are explored in the beginning of the film as is the birth of his youngest son, a half-demon he named Inuyasha. This is explained in the 21st Episode of Hanyō no Yashahime as it was his demise that ultimately led to the creation of the seven mystical Rainbow Pearls via Zero's tears of sorrow over losing him.
 * This is the only movie, in which the resurrected Kikyō does not appear nor she is mentioned or referenced.
 * Miroku Piyo Piyo.png umbrella Miroku uses during the night with Shippō features the Piyo Piyo Symbol which comes from Rumiko Takahashi's second major work Maison Ikkoku used by protagonist Kyoko Otonashi.
 * It's shown that Inuyasha was born during a lunar eclipse, which probably contributes to his reversion to human on nights of a new moon.
 * This is the first time Tōga is seen in his human form and the first time his voice is heard.
 * It is learned that Inuyasha's father gave him his name.
 * It turns out that Inuyasha is much older than he appears. He was actually 200 years old by the time Kagome broke his seal, despite looking only 15 years old. (Note: because Inuyasha was sealed to a Tree of Ages, he did not age during the fifty years he was sealed.)
 * It's interesting to note that Jaken calls the Tenseiga "useless", considering he would not be alive at this moment had Sesshōmaru not used it to revive him.
 * This is first time that Inuyasha is without the Beads of Subjugation since his seal was broken.
 * This is the first time the Bakuryūha is overcome (a true demonstration of Sesshōmaru's power).
 * Sesshōmaru's original left arm makes an appearance.
 * This is neither the first nor the final time that Inuyasha and Sesshōmaru will work together to defeat an enemy beyond either one's reckoning alone.
 * Despite having twice tried to kill his younger brother within a span of roughly 48 hours, Sesshōmaru jeopardizes his own safety to protect Inuyasha. Of course, the "reason" he pushes Inuyasha out of the line of fire is that Inuyasha is "in his way".
 * Sesshōmaru's desire to protect Jaken and Rin — even at the expense of his pride—proves he really does care for them.
 * Although Sesshōmaru has the opportunity to take the Sō'unga for himself after it is defeated (he could have simply flown out and grabbed it along with his arm), he instead decides he does not need it and allows it to fall into the Netherworld. It is when he finally stops desiring Tessaiga in the same manner that his arm will regenerate and he will come into his own sword, the exponentially more powerful Bakusaiga.
 * After taking only one of the Zombified Oni into the Kazaana, Miroku is severely weakened—almost to the point of immobility. Later in the film, he sucks in an entire legion of Zombie soldiers but manages to both survive and flee the castle when it begins to collapse. This is one of the many instances that Miroku's tolerance to poisons is radically inconsistent.
 * Takemaru's situation with demon swords is the inverse of Sesshōmaru's. By attaching a demon's arm to his own human body, Takemaru was able to wield Sō'unga; conversely, by attaching a human's arm to his own demon body, Sesshōmaru was able to wield Tessaiga. That fact that Takemaru used Sesshōmaru's arm adds for a little bit of irony.
 * The way the plot revolves around Sesshōmaru and Inuyasha's father highlights the strange fact that all of the main characters have dead fathers.
 * This is the only time that Sō'unga appears in the entire series, and never was mentioned before or after the movie. However, it made appearances in flashbacks in Hanyō no Yashahime and in alongside the spirit of Tōga.
 * It turns out that the Tessaiga isn't the only sword that can affect Inuyasha's demon blood. Sō'unga managed to manipulate it when being wielded by Inuyasha.
 * Saya is actually the first person to go into the well (Kagome is second, Inuyasha is third, Sōta was fourth then Shippō in the series) while keeping Sō'unga sealed for 700 years.
 * This movie marks the first time Miroku verbally tells Sango he loves her.
 * This is the only movie when the villain was not defeated by the combination of Inuyasha's and Kagome's power (although Kaguya was ultimately killed by Miroku following the destruction of her physical form). Instead Inuyasha combines his power with that of Sesshōmaru.
 * When Tōga revived Izayoi with the Tenseiga, the sword not only revived her, but might've healed the aftermath of the birthing, the wound that Takemaru of Setsuna inflicted on her, and shrunken the swollen belly when she was pregnant with Inuyasha.

Canonical inconsistencies

 * Much of the film revolves around Inuyasha and Sesshōmaru's feelings concerning their father, particularly their desire to surpass him in strength. However, Inuyasha had already surpassed his father in strength in Season 2 when he defeated Ryūkotsusei, a demon his father hadn't been able to kill while he was alive. Tōtōsai even says as much at the time; however, in the movie, he claims that Tōga is "1000 times stronger" than Inuyasha, which in canon is false, as Inuyasha is stronger, at least with the Tessaiga, although perhaps he is less skilled than his father was. Furthermore, Sesshōmaru is easily able to suppress Inuyasha's Bakuryūha, implying his aura is far stronger than Inuyasha's, and by extension, his father's and Ryūkotsusei's. Yet in the film, he acts as if he will never know if he is stronger than his father because he cannot fight him in person.
 * As in the Panther Devas arc in Season 3, Sesshōmaru struggles with why his father bequeathed the Tessaiga to Inuyasha and the Tenseiga to him. Yet Sesshōmaru already discovered from Bokusenō in Season 2 that Tōga gave Inuyasha the Tessaiga to prevent his demon blood from overpowering his human soul, and Sesshōmaru seems to accept this fact; but in the movie he still seems oblivious to his father's thinking, despite having learned of it two seasons prior.
 * Jaken himself suggests in the Panther Devas arc for Sesshōmaru to join forces with Inuyasha to confront the Panther tribe, yet in the film, when Saya suggests it, Jaken laughs hysterically as if it is impossible, despite the fact that the two brothers have more or less cooperated multiple times in the past, against such foes as the Panther King, the Band of Seven, and Naraku. He also later urges Sesshōmaru not to rely on Inuyasha's help, despite having urged him to do so in previous battles, and despite the fact that Sō'unga was far more dangerous an opponent than the Panther King.
 * In the film, Sesshōmaru falls to his knees in pain after using the Tessaiga, due to its barrier. However, in both the anime and the manga, Sesshōmaru is repeatedly shown touching and even using the Tessaiga without showing any sign of pain or fatigue. Even Jaken shows less outward signs of pain when he touches the sword in Episode 79 than Sesshōmaru does in the movie. In fact, even when impaled, Sesshōmaru shows less outward show of emotion than he does in this film after merely touching the Tessaiga's barrier. Whether Sesshōmaru's out-of-character behavior is a continuity error in the film or done intentionally for dramatic effect is unclear.

Goofs

 * During a total lunar eclipse, when the moon is inside of the umbra, it should've been red due to the refraction of the sunlight by the Earth's atmosphere into the shadow cone, but instead it was pitch black.
 * When Inuyasha was walking through the hole to finish Takemaru of Setsuna, the strap of his kimono was gone.
 * When Rin threw the Beads of Subjugation at the Zombified Oni, the spiritual power they possessed was strong enough to melt its head. However, when the rosary exploded earlier in the film, one of the beads was embedded in Jaken's forehead causing no lasting damage. (On a converse note Rin may be a priestess, either from being revived from Tenseiga or from being born with it Kagome never hit the demon with the beads which might have had the same effect)
 * In a scene during his ascent of the mansion to save Kagome after she was kidnapped by Takemaru, Inuyasha appears to have two Tessaigas: one drawn out in his hand, and the other inside its sheath. This scene is located right before Inuyasha runs into Sesshōmaru, after having just used the Wind Scar.
 * When Kagome yelled the "Sit" command the second time to break Inuyasha out of Sō'unga's spell, Inuyasha should've been face first to the ground. Instead he was on his back when the smoke cleared.
 * Just before Inuyasha defeats Takemaru, we can see Sesshōmaru who has three stripes on the left (seen from spectators point of view) side of his face instead of two.

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