Bakuryūha

The also known as the Backlash Wave in English dub, is the ōgi or ultimate attack of the Tessaiga. The technique can only be used by someone who has mastered the Kaze no Kizu, the base technique of the Tessaiga. When an opponent with strong yōki unleashes an attack, the Tessaiga can use the Kaze no Kizu to engulf the enemy's attack in a twister and reverse it back on them with the added power of the Kaze no Kizu.

Inuyasha instinctively learned and mastered the technique when he in the midst of his battle with Ryūkotsusei. He used the Bakuryūha without knowledge of the technique, something Tōtōsai, the creator of the Tessaiga, said was impossible. The user's yōki must be greater than the enemies' own yōki or else the technique cannot be used, as both explained by Tōtōsai after Inuyasha discovered it and as seen against the battle with Sō'unga in InuYasha the Movie: Swords of an Honorable Ruler, in which the Gokuryūha's yōki was stronger than Inuyasha's and the Bakuryūha didn't form.

爆流破 Bakuryuha