Inu no Taishō

, also known as the, was a powerful Inu-Daiyōkai who was known quite well and feared throughout feudal Japan as being the very strongest of his kind. He fathered two sons, the second of which was the Inu-Hanyō Inuyasha who was born from the human woman Izayoi, Inu no Taishō's wife. His first-born son was the powerful Inu-Daiyōkai Sesshōmaru, mothered by a female Inu-Daiyōkai. Two hundred years before the shattering of the Shikon no Tama, he stopped the invasion of a lead by the Lord Hyōga and his son Menōmaru. Long before this, he defeated the Panther King after the tribe attempted to take over the western lands he ruled.

He had many adversaries during his lifetime, and many of them have ended up crossing paths with one or both of his sons many years later.

History
Inu no Taishō survived long enough to save his wife Izayoi and their newborn child Inuyasha; still weak from his battle with Ryūkotsusei, he dies defending them from a human foe named Takemaru. The gateway to his tomb is hidden in a black pearl (a mystical gem that creates a path between the mortal and spirit worlds) inside Inuyasha's right eye, which was created by Hōsenki, an oyster demon, on Inu no Taishō's command. Within the pearl, their father's body is shown as an enormous dog skeleton in a suit of armor: his true form, according to Myōga. The sword Tessaiga, forged from Inu no Taishō's own fang, rests inside this cavernous skeleton, protected by a barrier that repels any non-human with malice toward humans. Because of this, Inuyasha inherits the sword rather than Sesshōmaru. This also suggests Inuyasha's father was never bigoted toward humans nor was he evil. Sesshōmaru even says that he had a "merciful heart for humankind." It seems that he did have a sense of honor and perhaps wanted both his kind and the human race to live in peace.

He acted as the lord of the western provinces of Japan, gaining many other yōkai allies, but also retaining a fondness for humans. This baffles his first wife, Sesshōmaru's mother, who is merely indifferent towards humans and views them mostly as a source of food.

While Inu no Taishō did not harm humans, he often faced challenges—or made them—with other powerful yōkai; his earliest known adversary was the daiyōkai Shishinki, who lost half of his face and had part of his Meidō Zangetsuha absorbed by the Tessaiga. However, since it was an incomplete and unstable technique, Inu no Taishō sealed it within Tenseiga. The second known challenge came from the Panther demon tribe, when Sesshōmaru was a mature demon; however, the war was settled when the Dog General slew the Panther King.

Although Inu no Taishō loved his family, his relationship with Sesshōmaru was shown to be distant — if not openly hostile — in the third film. Sesshōmaru's hatred for humans at the start of the series is even greater than his mother's, as we never hear her say a word against Inuyasha or Izayoi. Yet, he clearly admires his father, and wishes to emulate his victory over many powerful demons. Sesshōmaru's mother seems to have been unfazed by Inu no Taishō's relationship with Izayoi — merely noting his odd fascination with humans, and still speaking affectionately of him when Sesshōmaru came calling.

At some point, Inu no Taishō fell in love with a human princess named Izayoi; while he continued traveling and challenging great demons (occasionally crossing paths with Sesshōmaru, who would ignore his advice) he would always come back to her, and she eventually became pregnant. However, a samurai named Takemaru who served Izayoi's castle was also in love with her. While Inu no Taishō was away battling a new yōkai (the dragon Ryūkotsusei) Takemaru discovered that Izayoi's pregnancy was the result of a tryst with a yōkai, and sought to prevent the hanyō child from being born.

Inu no Taishō had finally met his match. Although he managed to seal Ryūkotsusei into a cliff while in his true form, he was unable to deliver a fatal blow, and he suffered lethal wounds. Myōga then brought him the knowledge that Takemaru was after Izayoi and his unborn son. Sesshōmaru sensed his father's imminent demise and demanded he bequeath him his swords Tessaiga and Sō'unga. Inu no Taishō refused to give them to him, asking if he was willing to kill him for them. Sesshōmaru stated that he wished to match his father's power by gaining one of the swords, so Inu no Taishō asked him if he had something to protect. Not realizing that his father had always been trying to teach him compassion, Sesshōmaru scoffed, deriding the need to protect something as weakness. It was this belief that truly cemented his hatred for Inuyasha centuries later, as he blamed the Dog General's death on his compassionate need to protect his wife and son. Inu no Taishō then took his true form and, despite Myōga's pleas, went for Izayoi one last time.

Arriving at the castle, he easily overpowered Takemaru's troops with Tessaiga, though suffering further injuries from arrows. Takemaru then challenged him, stating that he had killed Izayoi so that she would not be defiled by birthing a demon. Enraged and grief-stricken, Inu no Taishō sliced off Takemaru's left arm and raced into the castle, while Takemaru ordered his troops to burn it down. Locating Izayoi's body and her newborn son, the Dog General resurrected her with Tenseiga as the castle burned around them. He covered them with the Robe of the Fire Rat to protect them from the flames, but as they prepared to flee, Takemaru returned. Knowing his injuries were fatal anyway, Inu no Taishō told Izayoi to flee and live a long life — as well as naming his second son Inuyasha. Throwing aside Tessaiga and Tenseiga, he drew Sō'unga and began battling with Takemaru, as the burning castle collapsed around them. Neither Takemaru nor Inu no Taishō survived.

Inu no Taishō's remains, along with Tessaiga, were consigned to the gateway region of the Netherworld — the gateway itself sealed within a black pearl that was hidden in Inuyasha's eye. This was the first of many indications that he reserved the mastery of Tessaiga for his younger son. Myōga had been charged with keeping an eye on Inuyasha and helping him access the inheritance when he was old enough. Also in accordance with his will, Tōtōsai 'delivered' Tenseiga to Sesshōmaru (nailing it to Bokusenō's trunk with a sarcastic note, knowing Sesshōmaru would probably try to kill him). No plan was left for Sō'unga as it was too unstable of a weapon, so it was sealed and thrown into the Bone-Eater's Well. After Sō'unga was finally consigned to Hell by the two brothers, Inu no Taishō's soul briefly appeared before them, expressing his pride. By the end of the series his deepest wishes have been granted: Inuyasha has found a secure and happy life with Kagome Higurashi and his friends, despite his half-demon heritage. Meanwhile Sesshōmaru has been taught the values of compassion, which balance his constant search for power and create a strong bond with his human ward, Rin.

While the various yōkai in Inu no Taishō's service scattered after his death, they remained loyal to his memory and showed deep respect to Sesshōmaru and — less frequently — Inuyasha. When the Panther tribe attacked again, all of Inu no Taishō's former allies joined to form an army under the command of Sesshōmaru, and once more drove them back.

Personality
His personality is more similar to Inuyasha's, tend to make outbursts while having little composure in battle. He also loved Izayoi dearly as well as his two sons. He was also stated to have compassion for humans by Sesshōmaru. Despite his compassion, he was capable of being ruthless when need be to both humans and demons. This was shown when Izayoi begged Takemaru to take his men and leave the palace grounds, not wanting him to be killed by Inu no Taishō.

Physical description
His white hair is only seen in a very high ponytail. Like other full-blooded yōkai, he has pointed ears as well as fangs and claws. He has wide, jagged purple-blue stripes on the sides of his face and amber irises.

Outfit
Inu no Taishō dressed similarly to his son Sesshōmaru, in that he wore a white kimono and hakama, armored boots, and a long flowing sash, with the latter two suggestive of Chinese influence. They also share similar breastplates, with a spiked rim, with the addition of Chinese vambraces and armored gauntlets, as well as layered spiked pauldron on each shoulder. He wears a parted pelt that extends from both shoulders and trails behind him as he walks; representing the two streaks of fur running down the back of his yōkai form. The Tessaiga and Tenseiga are worn at his waist, while the Sō'unga is worn across his back.

Powers & Abilities
Much of Inu no Taishō's abilities are unknown, but he is known to be tremendously formidable in battle, having defeated many extremely powerful Daiyokai.

Immense Demonic Power: He has been stated to be one of the most powerful yōkai by Myōga and Tōtōsai, as he had defeated extremely powerful Daiyokai such as Shishinki, the Panther King and also Hyoga. However, despite his great power, in his fight with Ryūkotsusei, Inu no Taishō met his match and was fatally wounded but did manage to penerate his extremely powerful defense once and seal him away. His power was initially superior to that of his sons, as he could fully control Sō'unga a demon sword of tremendous power that can easily corrupt and possessed all the past Yokais who tried to wield it and not even Inuyasha, his second son, despite his own tremendous demonic power, could completely resist Sō'unga's mind controlling powers, whereas Toga managed to wield it without succumbing to Sō'unga's influence and Sesshōmaru believed the only way for him to surpass his father is for him to get one of his great swords, but at full potential, they eventually managed to surpass his power.

Shapeshifting: He could change his appearance to resemble that of a human's, much like Sesshōmaru. His true form was that of a gigantic dog with a single blue jagged-like stripe on each cheek and twin streaks of fur running down his back. He was much larger than both Sesshōmaru's and Sesshōmaru's mother's yōkai forms.

Immense Endurance: Despite having suffered fatal wounds, his enhanced anatomy enabled him to travel an incredibly long distance and defeat an army of samurais to save Izayoi and his newborn son Inuyasha and fighting Takemaru equally until the castle collapsed on him and killed him.

Master Swordsman: Toga is a powerful demonic master swordsman, as he has commanded the three swords of Supreme conquest: Sō'unga, Tessaiga and Tenseiga with great skill. While fatally injured, Toga used the Tessaiga to annhilate an army of samurais with a single Wind Scar attack and also made short work of Takemaru, slicing his arm, despite Takemaru being himself a master swordsman, in their first round and then fight him to a standstill. According to Totosai and Myoga. Toga is the only one who can fully control Sō'unga, the sword of hell that can destroy the world.

Foresight: Aside from his immense strength, Inu no Taishō also had incredible foresight, with some of his actions having a hidden message behind them. He entrusted the Tessaiga to his son Inuyasha, accurately predicting that he needed the sword to protect himself, as well as another, namely Kagome. He bequeathed the healing sword Tenseiga to his eldest son, Sesshōmaru, in order to teach him compassion. Tōtōsai eventually reforged Tenseiga into a weapon, giving it the ability to perform the Meidō Zangetsuha, presumably on Inu no Taishō's orders.

Barriers: Inu no Taishō was somehow capable of creating barriers of immense power as he was able to put a powerful barrier on Tessaiga, which was powerful enough that not even Sesshomaru, his own pure blooded demon son and a powerful Daiyokai himself can withstand.

Weapons

 * Also known as the "Sword of Earth", the Tessaiga was created from the fang of the Inu no Taishō. He created it to protect Izayoi, Inuyasha's human mother. In his will, Inu no Taishō leaves the Tessaiga to his youngest son, Inuyasha.
 * The Tessaiga's signature attack that can slay one hundred yōkai in a single strike. As the original owner, Inu no Taishō is able to fire the Kaze no Kizu at will without needing to clash his yōki with another demon's like Inuyasha needed to at first.
 * The Tessaiga's ougi (lit. "ultimate technique"). It uses the opponent's yōki and unleashes the Kaze no Kizu at the right point. The yōkai's energy would be reflected back with the added power of the Kaze no Kizu.
 * Also called the "Sword of Heaven", the Tenseiga was created from the fang of Inu no Taishō. It is capable of reviving the dead of one hundred beings, whether demon or human, with one stroke. Tenseiga cannot cut the living but can cut spirits and the living dead. In his will, Inu no Taishō left the Tenseiga to his eldest son, Sesshōmaru.
 * Resurrection: The Tenseiga could restore the life of the recently deceased by destroying the pall-bearers who took the souls of the dead. However, it requires a relatively-intact body to work and only worked once as not to grant eternal life. Although the Tenseiga could not harm what belonges to the Living World, its healing powers allowes it to slay the undead and spirits.
 * This technique manifests as a giant black circle that sends anything within its vicinity directly to the Netherworld. This technique originally resided with Tessaiga. This is the first technique that Tessaiga absorbs from another yōkai: Shishinki. Inu no Taishō stole this technique from Shishinki during their battle. Unfortunately, he is unable to use it properly. He has Tōtōsai split off the technique from Tessaiga along with a part of the sword that would become Tenseiga. He hoped that his son Sesshōmaru would be able to master the technique so he could return it to Tessaiga when it is complete.
 * Also called the "Sword of Hell", the Sō'unga is a yōkai sword that Inu no Taishō possessed and contained to prevent it from falling into the wrong hands. It contains the spirit of an ancient evil yōkai. It has the ability to control the dead and open a gate to hell. Inu no Taishō's hope was that one day his sons would be able to find the answer to sealing Sō'unga for good..
 * Sō’unga's most powerful attack; it possessed more destructive power than the Tessaiga's Bakuryūha. Sō’unga can unleash a large, violent, and powerful purple/black tornado that annihilates everything that is caught in its path. Myōga described this as being the attack of a dragon from Hell. However, if both Tessaiga and Tenseiga were close by, the strength of the Gokuryūha weakens.
 * Reanimation: Unlike other weapons which includes demon swords as well, Sō'unga's slain victims don't simply die, but their corpses are reanimated as soulless undead that unless specially commanded will mindlessly attack the living in their vicinity.
 * Path to Hell: Sō’unga can open a portal in the Underworld.

Family
She was Inu no Taishō's mate and mother of his first and full-yōkai son, Sesshōmaru. He left her the Meidō Stone as well as information regarding Tenseiga. Given that Tenseiga was broken from Tessaiga, and that Tessaiga was forged to protect Izayoi (thus Tenseiga did not exist until after he had feelings for Izayoi), then it can be assumed that Inu no Taishō and Sesshōmaru's mother remained on good terms even though he left her for Izayoi up until his death. For her part, she does not speak at all negatively about him to Sesshōmaru and even remarks that Sesshōmaru lacks Inu no Taishō's charm and, perhaps, shares his affections for humans.
 * Sesshōmaru's mother

It is unknown when they first met, but they ended up falling in love and married which resulted in a half-demon child, Inuyasha. After his last battle with Ryūkotsusei, he rushed to save her without first tending to his wounds. He fought through the soldiers only to find her already dead. Using the Tenseiga, he brought her back to life, giving her the Robe of the Fire-Rat, and telling her to escape with their newborn son whom he names Inuyasha. His last words were: "Izayoi...You must live. Live a long life. Live long and well with Inuyasha." This showed that the Great Dog Demon did deeply care about his sons and did not see them as mere tools of heritage.
 * Izayoi

Being born only moments before Inu no Taishō's death, Inuyasha never met his father. He only ever sees the spirit of his father at the end of Swords of an Honorable Ruler. After saving Izayoi from Takemaru with Tenseiga, Inu no Taishō named his son Inuyasha. According to Myōga, Inuyasha is able to use his sword Tessaiga because he protects Kagome, who is human, mirroring Inu no Taishō's relationship with Izayoi.
 * Inuyasha

Inu no Taishō's relationship with his first son was somewhat strained because of the former's relationship with the human Izayoi and the latter's ambitions to surpass him. Sesshōmaru was greatly offended that his father left his hanyō brother Inuyasha, and not him, the Tessaiga. In Swords of an Honorable Ruler, during his last night alive, the gravely wounded Inu no Taishō asked him if he had "someone to protect." Sesshōmaru flatly responded "No." His father passed to him the Tenseiga rather than the Tessaiga. Initially, Sesshōmaru deemed the Tenseiga useless since it cannot cut anything; however, over the course of the story, he started to understand and then respect its power. He also came to understand his father's cryptic words. Upon meeting the human child Rin, his attitude toward humans began to change. Sesshōmaru felt he should protect the young girl. With something to protect (Rin, Jaken, and sometimes Inuyasha), Sesshōmaru became a very powerful daiyōkai, just as his father intended for him.
 * Sesshōmaru

Sesshōmaru's feelings towards his father and family in general seem very complicated. While Sesshōmaru never expresses any direct emotional attachment to either of his parents, he gives indirect clues. He wishes to be greater than his father. That his father does not grant him what he feels is his birthright seems to hurt his pride and drives him to demonstrate his greatness. While Sesshōmaru may appear to have always hated Inuyasha, the earliest depicted feelings are his anger that Inuyasha cannot join him in a battle since he has been sealed to a tree by a human, Kikyō. That this half-demon and half-brother gained the birthright he expected kindles his resentment for his father as well as his hatred for Inuyasha. It would appear through the early parts of the story, he believes killing Inuyasha and gaining Tessaiga will, in his mind, prove his father wrong and elevate him above his father. That Inuyasha can wield Tessaiga and would have killed him if not for the protection of Tenseiga further shakes his confidence. However, Sesshōmaru shows nothing but respect for his father's remains to the point of punching Inuyasha for daring to be present. When he sees his father again at the end of Swords of an Honorable Ruler, he looks in awe and respect rather than contempt. As the story depicts the maturation and development of all the main characters, Sesshōmaru's attitude and understanding of his father, particularly his wisdom, develops as well.

For his part, Inu no Taishō certainly cares for his elder son, but he is often frustrated and disappointed with his callous attitude towards humans and his focus on power above anything else. As the story slowly reveals through the characters Myōga and Tōtōsai who knew him, Inu no Taishō devised a very elaborate plan to bring his sons together. Ironically, Sesshōmaru ends up protecting a human just as his father did.

Allies
Myōga was Inu no Taishō's closest vassal and adviser, serving under him for many years. Throughout the series, Sesshōmaru and Inuyasha encounter their father's numerous enemies, and Myōga is usually the only person who is able to shed light on them and what they are after, a few prime examples being Ryūkotsusei, Hyōga, and Shishinki. Myōga ends up being Inuyasha's periodic vassal throughout the series, giving advice and sharing wisdom just as he did for his father. He remains fiercely loyal to his first lord as well, and becomes upset when Inuyasha says he does not care about avenging his father.
 * Myōga

Tōtōsai was the yōkai blacksmith who crafted both the Tessaiga and Tenseiga from Inu no Taishō's fangs. He was also entrusted with bequeathing the two swords to the his sons after Inu no Taishō's death, giving Sesshōmaru the Tenseiga, and Inuyasha the Tessaiga. In the anime, Tōtōsai says that giving the elder brother Tenseiga and the younger brother Tessaiga was Inu no Taishō's dying wish. Tōtōsai was also given instructions by Inu no Taishō about Meidō Zangetsuha and how to show Sesshōmaru the path to true power.
 * Tōtōsai

A wise tree yōkai and old friend, Bokusenō donated boughs of his own wood from which to carve the scabbards of Tessaiga and Tenseiga.
 * Bokusenō

Enemies
A dragon demon with powers that resemble lightning. Inu no Taishō only managed to seal him to a cliff with his claw. According to Myōga, Ryūkotsusei was much too powerful to kill. It is implied that the wounds Inu no Taishō received in that battle led to his demise during his battle with Takemaru of Setsuna in the third movie. Many years later, Naraku releases Ryūkotsusei's seal hoping the dragon would kill Inuyasha, who was there to defeat Ryūkotsusei.
 * Ryūkotsusei

A moth demon from "the Continent," or as some have inferred, China, he is yet another demon that Inu no Taishō managed to seal but not defeat. Sealed within the Tree of Ages, Hyōga is absorbed by his son and successor Menōmaru, who in turn tries to kill Inuyasha and absorb all living souls on earth.
 * Hyōga

The original wielder of the Meidō Zangetsuha. The battle between him and Inu no Taishō is implied to be inconclusive though it is revealed Shishinki was terribly injured, losing a portion of his face. He seeks to kill Inuyasha and Sesshōmaru as revenge for stealing his technique.
 * Shishinki

A demon that Inu no Taishō managed to defeat long ago. He was revived by his tribe using sacred jewel shards. The Panther King was destroyed by Inuyasha and Sesshōmaru.
 * Panther King

A human who was in love with Izayoi. Takemaru loved Izayoi and believed that her heart had been captured by Inu no Taishō. Takemaru then fought with Inu no Taishō and lost his left arm. Takemaru then ordered his men to set the mansion on fire, with Izayoi, Inuyasha, and Inu no Taishō still inside. He then followed Inu no Taishō into the mansion and fought him to the death inside the burning mansion while Izayoi escaped with Inuyasha.
 * Takemaru

Trivia

 * "Inu no Taishō-ō" (闘牙王, Fighting Fang King) was the name given to Inuyasha's father in the third movie script and it also appeared in one of the trailers, as well as the original draft of the soundtrack, but the name was removed before release in order to avoid confusing fans.
 * It is interesting to note that while Inu no Taishō is Inuyasha's only demonic parent, they do share markings when Inuyasha is in his full demon form. However, while Inu no Taishō has a single blue stripe on either cheek, and his mother has a single magenta stripe, Sesshōmaru has two magenta stripes on either of his cheeks. It is not known from which parent he obtained the double magenta stripes.
 * In the InuYasha manga, Inu no Taishō's humanoid form never appeared, only his true form, however, author Rumiko Takahashi personally designed his human form for the third movie. These designs appeared in an issue of Shōnen Sunday.
 * Many fans refer to him as Lord of the Western Lands, however such a designation appears nowhere in any incarnation of the series. He was never stated to have any land holdings or official political power other than holding the title of "General" and being "based in the western provinces". After Sesshōmaru discovered that his father had intended for Tenseiga to be re-absorbed by Tessaiga, he lamented that this meant that his father intended to "leave him with nothing," indicating that Tenseiga was his sole inheritance from his father, and he did not inherit any land, title, or followers.
 * Inu no Taishō, Sesshōmaru, Sesshōmaru's mother and Inuyasha are mostly or at least partly based off of the Inugami, a Japanese dog-like demon. Japanese folklore describes Inugami as zoomorphic, or anthropomorphic, dog-like beings, often similar to werewolves.
 * Inu no Taishō's age is never revealed in the movie but given that in his original design he has the mature appearance of a man in his late 30s to early 40s he is a lot older than he looks, and many have believed him to have been close or over 3000+ years old when he died.

Media appearances
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Manga

 * Chapter 12
 * Chapter 15
 * Chapter 16
 * Chapter 297
 * Chapter 298
 * Chapter 301
 * Chapter 315
 * Chapter 318
 * Chapter 319
 * Chapter 320
 * Chapter 321
 * Chapter 322
 * Chapter 323
 * Chapter 324
 * Chapter 325
 * Chapter 326
 * Chapter 399

Anime
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 * Episode 5
 * Episode 6
 * Episode 7
 * Episode 53
 * InuYasha the Movie: Affections Touching Across Time
 * Episode 76
 * Episode 79
 * InuYasha the Movie: Swords of an Honorable Ruler
 * Episode 143
 * Episode 144
 * Episode 145
 * Episode 153
 * Episode 155
 * Episode 156
 * Episode 157
 * Episode 164
 * Episode 5 (FA)