Episode 43

Tetsusaiga Breaks is the 43rd episode of the InuYasha anime.

Summary
As Inuyasha and Sango lay, wounded, they are taken care of by Shippo while Miroku and Kagome gather medicinal herbs. But Soul Collectors appear, and Inuyasha follows them to Kikyo. They chat a bit, Kikyo seems to have a plan to destroy both Naraku and the Shikon Jewel, which comforts Inuyasha a bit since she obviously don't want him dead (... or at least not by Naraku's hand). Kagura interrupts and attacks, but she's quickly defeated by Kikyo and escape. Kikyo leaves. Inuyasha goes back to his friends, but doesn't expand on the content of his chat with Kikyo, much to Kagome's annoyance.

Meanwhile, a new incarnation of Naraku, Goshinki, is destroying a village to lure Inuyasha and his sword there. Goshinki, to Kagura's surprise, is big, seemingly stupid and beast-like... but able to read minds. Kagura helps trapping Inuyasha by sending a dead man to warn him of the village's destruction, but she's disgusted by Goshinki's cruelty and leaves. Inuyasha arrives and battles Naraku's third incarnation, just in time to save the two children who are the village's last survivors. Enraged, Inuyasha is about to use the Wind Scar when Goshinki prevents him from it and breaks the Tessaiga between his jaws. Inuyasha is hurt, and more, he's shocked nearly out of his mind. Goshinki taunts the others a bit to make them attack him (attacks he would be able to dodge due to his mind-reading ability), and mocks Inuyasha's death... except he isn't dead. Inuyasha is not only very much alive, he's transformed into his full-demon form and has no trouble killing Goshinki bare-handed. His friends are worried for Inuyasha, who doesn't seem himself, and Kagome use the "sit" command to bring him back to normal, to everyone's relief.

Trivia

 * This is the first time Inuyasha has transformed into his full-demon form.