Sound Breathing (音の呼吸, Oto no kokyū?) is a Breathing Style unique only to the Sound HashiraTengen Uzui. The Sound Breathing is branched out from the Thunder Breathing. This Breathing involves using a battle strategy called a "Score", which involves Uzui reading his opponents movements and deconstructing them into sound by analyzing the rhythm of their movements. Through this, he is able to take advantage of their openings to much greater effect by striking in a way similar to making the beat to a song. In conjunction with this, he uses small but powerful anti-demon bombs made with a special gunpowder that are capable of overpowering an Upper Rank Demon briefly.
First Form: Roar (壱ノ型轟, Ichi no kata: Todoroki?)[1] - Uzui lifts his twin swords above his head and slams them down with great force whilst simultaneously creating an explosion with his bombs, causing a loud sound resembling thunder.
Fourth Form: Constant Resounding Slashes (肆ノ型響斬無間,Shi no kata: Kyōzan Muken?)[2] - Uzui holds his swords apart and spins them rapidly in conjunction with releasing his bombs, making this technique a combination of offense and defense.
Fifth Form: String Performance (伍ノ型鳴弦奏々,Go no kata: Meigen Sōsō?)[3] - Uzui holds one of his swords with a reverse grip and spins the other using the chain that connects them. He couples this by also releasing numerous bombs to detonate. This technique was able to overpower an Upper Rank Demon.
