Beast Breathing (獣の呼吸,Kedamono no kokyū?) is a Breathing Style personally created and self-taught by Inosuke Hashibira after living in the mountains and fighting for survival. It is said to be distantly derived from the Wind Breathing. The style enhances a user's sense of touch, while being able to utilize several different techniques.
First Fang: Pierce (壱ノ牙穿ち抜き,Ichi no kiba: Ugachi Nuki?) - Inosuke stabs the target's neck with both blades.
Second Fang: Rip and Tear (弐ノ牙切り裂き,Ni no kiba: Kirisaki?) - A double slash with his two blades in both diagonals (like X).
Third Fang: Devour (参ノ牙喰い裂き,San no kiba: Kuizaki?) - Simultaneous horizontal slashes towards the target's throat.
Fourth Fang: Slice 'n' Dice (肆ノ牙切細裂き,Shi no kiba: Kiri Komazaki?)- A multiple diagonal double slashes with both swords.
Fifth Fang: Crazy Cutting (伍ノ牙: 狂い裂き,Go no kiba: Kuruizaki?) - The 'Mad Cleave' is a technique which slices everything in all directions.
Sixth Fang: Palisade Bite (陸ノ牙乱杭咬み,Roku no kiba: Ranguigami?) - A simultaneous decapitation with his two swords from both directions.
Seventh Form: Spatial Awareness (漆ノ型空間識覚,Shichi no Kata: Kūkan Shikikaku?) - Inosuke can identify the position of enemies by feeling small disturbances in the air. This technique was so strong that Inosuke could sense all the demons spread out through a whole mountain.
Eighth Fang: Explosive Rush (捌ノ牙爆裂猛進,Hachi no kiba: Bakuretsu Mōshin?) - Inosuke charges towards his opponent while dual wielding, then he swings his blades to decapitate them.
Ninth Fang: Extending Bendy Slash (玖ノ牙伸・うねり裂き,Ku no kiba: Shin - Unerizaki?) - Inosuke dislocates the joints of his arm to increase the range of his attack.
Tenth Fang: Whirling Fangs (拾ノ牙円転旋牙,Jū no kiba: Enten Senga?) - Inosuke spins his swords in a circular motion.
Sudden Throwing Strike (思いつきの 投げ裂き,Omoitsuki no Nagesaki?) - Inosuke throws both of his blades at an enemy.