Thunder Breathing

The Thunder Breathing (の) is one of the five main Breathing Styles directly derived from the Sun Breathing. The Thunder Breathing combat style mimics swift strikes and movements of lightning and electricity and infuses it with the users swordsmanship. This combat style is very reminiscent of the real life sword style know as Iaijutsu.

It has been remarked by Zenitsu that this combat style focuses on channeling strength into the user's legs, and maximizing the output of every single muscle and blood vessel in them.

It was created from one of Yoriichi Tsugikuni's students who attempted to learn the Sun Breathing, but due to not being as innately powerful as Yoriichi, they were instead taught an alternated breathing style that focused on their individual strengths and weaknesses, which eventually evolved into the Thunder Breathing.

The former primary cultivator for the Demon Slayer Corps was Jigoro Kuwajima.

Techniques
There are a total of six original forms that can be used with the Thunder Breathing with the First Form said to be the foundation for the rest of them. However, Zenitsu Agatsuma developed a seventh form in order to stand on equal ground with Kaigaku, his former senior disciple under Jigoro who had become the Upper Rank 6 of the Twelve Kizuki, replacing Daki and Gyutaro.

Note: Since the second to sixth form has only been displayed by Kaigaku who uses lightning in conjunction with his sword attacks, it is unknown how a normal Thunder Breathing swordsman would perform these techniques.


 * 1) First Form: Thunderclap and Flash (ノ) - The swordsman unsheathes their blade, dashes forward at blinding speeds that mimic lightning ripping through the air and decapitates the opponent.
 * 2) * Six Fold - An extension of the Thunderclap and Flash technique created by Zenitsu. Zenitsu performs the Thunderclap and Flash technique six times in quick succession while slightly augmenting the power his dashes.
 * 3) * Eight Fold - An extension of the Thunderclap and Flash technique created by Zenitsu. Zenitsu performs the Thunderclap and Flash technique eight times in quick succession while slightly augmenting the power his dashes.
 * 4) * God Speed - An extension of the Thunderclap and Flash technique created by Zenitsu and the fastest version of the attack, even swift enough to evade the senses of Upper Rank Demons. During the first display of this technique, an unconscious Zenitsu remarked that he mustn't perform this technique more than 2 times, otherwise his legs would be rendered useless due to muscle fatigue and exhaustion. However, during the battle against Muzan Kibutsuji, Zenitsu has shown improvement in the use of this technique, allowing him to use it more than 2 times while still maintaining the power and speed of the attack.
 * 5) Second Form: Rice Spirit (ノ) - Kaigaku unleashes five electrified arching slashes in a single moment.
 * 6) Third Form: Thunder Swarm (ノ) - Kaigaku generates powerful electricity and simultaneously unleashes blinding sword attacks that surround the enemy.
 * 7) Fourth Form: Distant Thunder (ノ) - Kaigaku generates powerful lightning strikes in several directions with his blade.
 * 8) Fifth Form: Heat Lightning (ノ) - Kaigaku unleashes a powerful ranged electrified sword slash upwards that burns the flesh of his opponent.
 * 9) Sixth Form: Rumble and Flash (ノ) - One of the most powerful Thunder Breathing techniques. Kaigaku releases a series of strong ranged electricity attacks that strike his opponent from multiple directions.
 * 10) Seventh Form: Honoikazuchi no Kami (ノ) - Possibly Thunder Breathing 's most powerful technique and the personal creation of Zenitsu Agatsuma. Zenitsu's katana takes the form of a bright yellow dragon that seemingly emanates electric sparks and lightning as he dashes forward at blinding speeds surpassing his Godspeed technique and decapitates the opponent. The speed required to perform this technique was so immense it burned the air around Zenitsu and caused his Kimono to be ripped to shreds.

Demonstrations

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Trivia

 * This Breathing Style is very similar to the real-life fighting style of Iaijutsu.
 * The First Form: Thunderclap and Flash is stated to be the basis for the other forms, which was all Zenitsu could learn and hone, while Kaigaku couldn't despite learning the other forms after it. Two unnamed Demon Slayers said that he wouldn't be able to master the others much.