Inosuke is an excellent swordsman whose self-created Breathing Style – the name for the show’s supernatural swordsmanship styles – is known as Beast Breathing, and utilizes simple, powerful attacks and a relentless offensive.
Having grown up on his own in the mountains, each of the Beast Breathing techniques is improvised and created by Inosuke Hashibira himself. The Spatial Awareness technique amps up the user’s sense of touch, allowing them to pick up on subtle changes in the area around them. With this move, Inosuke was able to lock in on the location.
Animal Imitation: Due to living and growing up with wild boars, Inosuke has learnt to imitate many of their behaviors, which contributed to his proficiency in his Beast Breathing. Enhanced Flexibility: Inosuke is extremely flexible to the point where he can bend backwards so far that his head reaches between his feet.
Since this Breathing Style is personally created and self-taught by Inosuke Hashibira after living in the mountains and fighting for survival, it can be assumed that it can only be utilized by someone with dual Nichirin Blades and an incredible sense of touch.
Why is Inosuke so strong?
Inosuke’s whole thing is his wild animal theme, but he also has a few pretty neat and surprising tricks up his sleeve. As the manga has revealed, one of his stranger talents is his extreme resistance to poison, which presumably has something to do with his incredibly strong constitution.
He was also able to sense a person’s malice and intent to kill even when they are outside his range of sight, which prevented him from getting killed by Gyutaro’s scythe attack. Inosuke was also able to sense that Daki’s obi had living people trapped inside it, which prevented him from accidentally harming them when fighting.
Inosuke used boars, bears and wolves as references when creating the Beast Breathing.  He is hated by the uniform-makers and the swordsmiths (Kozo Kanamori) of the Demon Slayer Corps because he always tears apart the top part of his uniform as well as chipping the swords the swordsmiths gave him with a rock, right in front of their eyes too.
What is Inosuke’s appearance?
10Navigation Appearance Inosuke is a young man of average height and pale complexion with an extremely toned and muscular build for his age, possessing large, defined muscles most notably over his stomach and arms.