Breathing Styles

Breath Styles are swordsmanship styles practiced and taught by the Demon Slayer Corps. They are capable of allowing their users to fight on par with Demons, and are generally used with Nichirin Blades to slay Demons, with a few exceptions.

Overview
Breath styles are swordsmanship styles practiced and taught by the Demon Slayer Corps. The Breath Styles make use of specific and concentrated breath patterns, which increase the user's lung capacity and amount of oxygen in the blood. This increase of oxygen allows the user to enhance their physical abilities and mental concentration, allowing them to fight on par with Demons, whose physical prowess surpasses that of the average human.

Focused breaths are also capable of clotting wounds from severe injuries and slowing down the circulation of poison in the bloodstream.

All known Breath Styles currently taught within the Demon Slayer Corps are derived from the Breath of the Sun, the first one ever created.

Full Focus Breathing
An advanced application of Breath Style, Full Focus Breathing, also known as Total Concentration Breathing, is a state where a Breath Style user inhales the maximum amount of oxygen within a specific breath pattern to raise their physical and mental prowess to their utmost limits. It is often used by Demon Slayers for a brief moment to temporarily boost their combat capabilities to prepare a decisive attack.

Advanced Demon Slayers, such as Hashira, can constantly maintain a Full Focus Breath state, morning, noon, and night, and even while asleep. This is known as Total Concentration Constant. There is an immense difference in strength, speed, and stamina between someone who can maintain Full Focus Breathing at all times and someone who cannot.

Learning to maintain a constant state of Full Focus Breathing requires tremendous effort, though, the skill itself is noted to be quite elementary despite the required effort.

The training process involves blowing into a special type of super durable gourd. The objective is to blow into the gourd with enough strength to make the gourd break apart. As training progresses, the gourd is replaced by larger and larger variations of the same type of gourd. The largest known gourd is about the size of a chair.

Breath Hybridization
It is possible for a swordsman to use more than one Breath Style technique at a time, allowing the user to take advantage of the advantageous aspects of both techniques. Tanjiro Kamado, for example, can use both the Breath of Water and Breath of the Sun styles simultaneously.

Branch System
All Breath Styles originate from the Breath of the Sun, the first Breath Style ever developed.

Trivia

 * The names of Breath Styles are very strict. For example, the Breath of Flames is never to be referred to as the Breath of Fire.
 * The concept of using special breathing techniques to achieve power is similar to Ripple from Jojo's Bizarre Adventure.

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