Breathing Styles

Breath Styles are swordsmanship styles practiced and taught by the Demon Slaying Corps. They make use of specific and concentrated breath patterns, which increase the users lung capacity and amount of oxygen in the blood. The increased amount of oxygen allows the user to increase their physical abilities and mental concentration to the point, where it is said that a human can obtain strength equally to a Demon. Furthermore does a focused breath slow down poisoning or bleeding. Breath styles are generally used with Nichirin Blade swords to slay demons, with some few exceptions.

Origin
All Breath Styles taught within the Demon Slayer Corps derive from the the Breath of Sun, the first one ever created.

Known Breath Styles and users
* retired from Demon Corps 

Full Focus Breath
A state, where a Breath Style user inhales the maximum amount of oxygen within a specific breath pattern to increase his/her physical and mental strength to it's utmost limit. It is often used by demon slayer to temporarily prepare a decisive attack. However advanced Demon Slayer such as Pillars have to be constantly in a Full Focus Breath state, even while in sleep.