Inosuke Hashibara is a demon slayer with the breathing form he made on his own, Beast breathing. A Breathing Style distantly derived from Wind Breathing and the personal creation of Inosuke Hashibira himself after living in the mountains and fighting for survival. It also seems to take inspirations from the wild boars that he grew up with. katanas. They are chipped with numerous gashes within the blade's edge, allowing the swords to rip and tear flesh, rather than cause a clean slice.