Bakuryūha



is the ougi 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 yoki (demonic energy) unleashes an attack the Tessaiga can use the Wind Scar to engulf the enemy's attack in a twister and reverses it back on them, with the add power of the Wind Scar.

InuYasha learned and mastered the technique when he battled Ryukotsusei. He used the Bakuryuha without knowledge of the technique, something Totosai the creator of the Tessaiga said was impossible. The user must have strong enough yoki to over power his enemy's or else the technique cannot be used.

Interesting note: some characters like Naraku have a greater yoki than Inuyasha, but he still manages to perform the attack.