In feudal Japan, the half demon Inuyasha was sealed away by the priestess Kikyo. Many years later he is revived by Kagome, who has slipped through time from the present day. Kagome is surprised when the sacred Shikon Jewel, which makes demons stronger, emerges from a cut on her body.

Kagome finds out that she may be the reincarnation of Kaede's late older sister, the priestess Kikyo, who sealed Inuyasha with her arrow. The Carrion Crow demon is after the Shikon Jewel and kidnaps Kagome, but Inuyasha shows up to save her. After Kagome defeats the Carrion Crow with an arrow, the Shikon Jewel shatters into pieces.

Kagome has the ability to see pieces of the Shikon Jewel. Inuyasha has the power to defeat demons. Both of their powers are needed to gather the shards of the jewel that were scattered, but the two don't get along. The demon Yura, who is after the jewel, manipulates villagers to attack Inuyasha.

Kagome has returned to the present day and is relaxing in her home when Inuyasha comes looking for her. Some of Yura's demonic hair is on his body. Kagome and Inuyasha return to feudal Japan to exterminate the Yura of the hair.

Kagome learns that Inuyasha is a half demon, born of a human mother and a dog demon. Inuyasha's half brother Sesshomaru appears, looking for the tomb of their father. In order to manipulate Inuyasha, he brings Inuyasha's dead human mother with him. But the woman turns out to be a demon known as a muonna.

The muonna makes Inuyasha reveal the location of his father's grave. Sesshomaru removes Inuyasha's right eye (the black pearl) and opens the entrance to the grave. Kagome is angered by Sesshomaru's cruelty. She goes with Inuyasha after Sesshomaru. Inside their father's tomb is a memento of Inuyasha's father, the sword Tetsusaiga.

Kagome is able to pull out the Tetsusaiga. Sesshomaru tries to kill her, and Inuyasha is angered and fights to protect Kagome. His will to protect a human changes the Tetsusaiga into its true form, a fang sword.

In the Kai Province, there is a young samurai named Nobunaga. He is a clumsy but earnest young man. He has heard rumors about the man that the the princess, his childhood friend, has married. Nobunaga tries to save the lord of the castle who is possessed by a toad demon.

Shippo is a demon fox whose father was killed by the the Thunder Brothers: Hiten and Manten. He steals the Shikon Jewel shards from Kagome so that he can avenge his father.

Inuyasha goes to save Kagome from Manten. Hiten devours the sacred jewel shard that Manten had and absorbs his demon powers. Hiten attacks Inuyasha with his Raigekijin. Inuyasha is in trouble and defends himself with the scabbard of the Tetsusaiga.

Kagome has returned to the present day to take a test. As she does, a noh mask, the Mask of Flesh, begins a violent search for the Shikon Jewel shards. Kagome's younger brother, Sota, tries hard to call Inuyasha to come to Kagome's rescue.

Kagome sees a Soul Piper, a demon that consoles the spirits of children. She helps Mayu, a girl who is about to become an evil spirit, to pass on.

Half demon Inuyasha's secret is that he becomes human once a month. That day, Inuyasha and the gang meet Nazuna and stay at a mountain temple. They fall into Kumogashira's trap and the sacred jewel shards are taken away from them. Inuyasha is injected with poison!

The ogress, Urasue, robs the grave of Kikyo, the priestess who sealed away Inuyasha fifty years ago. She revives Kikyo's body using the ashes of Kikyo's bones and soil from Kikyo's grave. But Kikyo's soul has already been reincarnated in a different body.

Kikyo is revived when Kagome's soul flows into her. She tries to kill Inuyasha, but Kagome takes back her soul. Fifty years ago, Kikyo wanted Inuyasha to use the Shikon Jewel to become human. But on the day of their promise, someone who looked like Inuyasha fatally injured Kikyo. Inuyasha realizes that there is a mysterious person who made them fight.

Miroku, a womanizing delinquent priest, has been collecting Shikon Jewel shards and steals Kagome's shards. Inuyasha tracks him down and confronts Miroku to get the shards back. Miroku fights back with his priestly powers and the wind tunnel in his hand that he was cursed with.

Kotatsu, a painter, sees a dream in which he becomes successful by controlling an army of ogres drawn with ink that has a sacred jewel shard in it. Miroku, Inuyasha and the others become involved in protecting the princess that Kotatsu is in love with.

Naraku appears before Sesshomaru and lends him an arm with a sacred jewel shard embedded in it. Sesshomaru attaches the arm to himself and appears before Inuyasha and the gang to steal the Tetsusaiga.

Sesshomaru wields the Tetsusaiga with his borrowed arm against Inuyasha, who fights back with his scabbard. When the two strike each other at the same time, Inuyasha gets up close to Sesshomaru, rips off his arm, and gets back the Tetsusaiga. When Inuyasha learns Naraku's plan, he fears that Kagome might die.

Kagome has her sacred jewel shards taken away from her and is returned to the present day, unable to return to feudal Japan. Back to her normal life, she agrees to go on a date with Hojo. Meanwhile, Inuyasha and the gang try to find out more about the mysterious Naraku.

Kagome returns to the shrine in the middle of her date with Hojo. She senses the presence of the Shikon Jewel shards and returns to feudal Japan. Naraku reveals that fifty years ago, Onigumo was in love with Kikyo. The demons that were drawn to Onigumo by his malice devoured Onigumo, and the demon Naraku was born.

Kikyo, who was brought back to life, is living as a priestess. A monk, who realizes that Kikyo is dead, tries to make Kikyo pass on, but Kikyo ends up killing him. Inuyasha saves the monk's disciples and runs to Kikyo when he hears the priestess's name.

Kikyo paralyzes Kagome. Inuyasha appears before her. Kikyo has been gathering the souls of dead girls. She vents her grudge against Inuyasha. Inuyasha reveals that he has never forgotten her. When Inuyasha kisses Kikyo, Kikyo tries to drag him to hell. But Inuyasha hears Kagome's voice and regains consciousness.

Sango, a demon slayer, is invited to Hitomi Castle along with her father, the leader of the demon slayers, and her younger brother, Kohaku. But it is a trap. Meanwhile, the undefended village is attacked by a horde of demons and annihilated. Naraku takes the Shikon Jewel shards that they had been gathering and leaves.

Sango fights Inuyasha, believing him to be her enemy. Naraku's plan is to have her fight to the death using the power of the Shikon Jewel shard. But Sango listens to Kagome and is no longer suspicious of Inuyasha.

Hakudoshi is scheming to take Naraku's place. He steals Kagome's Shikon Jewel shards and entices Kagura to betray Naraku.

Upon healing her wounds inflicted by Naraku, using Midoriko's soul, Kikyo runs into Inuyasha again and reveals the secret to destroying Naraku.

It is the day of the annual Fox Demon Exam at the Demon Inn. Miroku and his friends get stuck taking the tests. Shippo hopes to be promoted in rank for playfully getting revenge on Inuyasha.

The swordsmith Toshu forges a demon-blade using one of Ryujin's scales, and the Dakki was born. Meanwhile, every time Inuyasha tries to attack, he is undermined by demonic energy.

The Tetsusaiga has attained the power of the dragon scales. In order to be able to quickly use the demonic power well, Inuyasha has no choice but to go through training.

Inuyasha and Koga arrive at the scene of Moryomaru and Naraku's fight. But Moryomaru, who wants his Shikon shards, catches Koga.

Kikyo has been contaminated by Naraku's spider web. In order to save her, Inuyasha and Kagome need the bowstring kept in Mount Azusa's mausoleum.

Kikyo attempts to purify Naraku and his Shikon shards along with Midoriko's will that controls the shards in Koga's legs.

Sesshomaru visits his mother to ask how he can expand the Tenseiga's Meido Zangetsuha technique. In response, his mother uses the Meido Stone that Sesshomaru's father gave her.

The Flower Prince is a demon that feasts on saddened or anguished hearts. Dazzled by the flower's fragrance, Inuyasha becomes entangled in a fake dream.

The Mirror Demon steals Tetsusaiga's demonic energy. Inuyasha counterattacks despite enduring some fierce blows, but all of his attacks aimed at the Mirror Demon end up being taken by Kanna.

During a new moon, Sango and Miroku face off against a "Bone-collecting" demon. During the battle, Miroku is forced to use his wind tunnel twice, resulting in his being poisoned. To protect him, Sango coats her hiraikotsu in poison and uses it to destroy the demon, destroying her weapon in the process.

The demon Shishinki approaches Sesshomaru for a fight, having been defeated by Sesshomaru's father long ago. To Sesshomaru's surprise, Shishinki attacks him using a complete Meido Zangetsuha and claims Sesshomaru's father stole the technique from him. Sesshomaru attacks with his Meido, but Shishinki's absorbs it.

Sesshomaru visits Totosai, who confirms that his father gave him Tenseiga so Sesshomaru could perfect the Meido Zangetsuha before he planned Inu Yasha to reabsorb Tenseiga back into the Tetsusaiga.

Seshomaru challanges Inuyasha in order to see if Inuyasha is worth having Tetsusaiga. He uses a fragment of Kanna's mirror to create a replica of the sword from Tenseiga.

The priestess Hitomiko loses her life at Naraku's hands, but she is resurrected and locks Kagome within a barrier. Then, the true spiritual power of Mount Azusa's bow reveals itself!

Inuyasha's group returns to Kaede's village to tell her of Kikyo's death. As they talk, she states that Kagome's power was probably sealed by Magatsuhi, the evil will of the Shikon Jewel that did it out of fear of Kagome's powers.

Kohaku remains unconscious after being stared down by Magatsuhi, the evil will. Kagome is worried, but she has to buckle down and study for her entrance exams, so she decides to return home.

Sesshomaru chases after the evil will, Magatsuhi. But it's only part of a trap set up by Byakuya of the Dreams. Magatsuhi finds Kohaku lying unconscious, and he tries to deliver his Shikon shard to Naraku.

Kohaku successfully drives Magatsuhi out of his body just as Sesshomaru arrives, who manages to cut Magatsuhi in half, destroying part of him. Naraku then tries to take Kohaku's shard himself, but Sesshomaru attacks with his Bakusaiga, which causes Naraku's body to explode.

Inuyasha's group leave to defeat Naraku, leaving Shippo behind. As they find Naraku and Byakuya in a cloud of miasma, they see Sesshomaru enter Naraku's body in search of Rin. As Inuyasha's group enters, Miroku pauses to propose to Sango.

Inuyasha's heart is devoured by the Shikon Jewel's poison, and he turns into his demon form helpless as the darkness in his heart takes control of him.

Kagome's spiritual powers are restored, and divine light is revived in Naraku's Shikon Jewel. However, Naraku uses this as a decoy to lure Sango into his trap.

Naraku has been living as a demon despite having a human heart. While fighting him, Kagome asks about his true wish.

Naraku heads for the Bone Eater's Well and vanishes! Before disappearing, Naraku makes his last wish for Kagome, injured at the hands of Byakuya, to be swallowed into Meido, the Path to the Underworld.