Moon Breathing

Moon Breathing (の) is a Breathing Style derived from Sun Breathing.

Description
Moon Breathing is a Breathing Style that mimics the moon and replicates it with the user's movements, techniques and swordsmanship. Most, if not all, known techniques and forms are standard yet powerful strikes and movements that always follow the shape and pattern of a crescent moon.

It has been revealed that, like all of the other original Breathing Styles, the Moon Breathing also branched out of the Sun Breathing. When its creator, Michikatsu Tsugikuni, attempted to learn the Sun Breathing from his twin brother, Yoriichi Tsugikuni, he discovered he was unable to master it and so was instead trained in an alternate Breathing Style.

This Breathing Style is only used by Upper Rank 1, Kokushibo, who was one of the first Demon Slayers who utilized Total Concentration Breathing. When he became a Demon he improved this Breathing Style using his Blood Demon Art, allowing him to create dozens of tangible crescent moons with every sword swing, each of them as sharp as blades, making this Breathing Style one of, if not the, most powerful and deadly ones showcased thus far.

Known Techniques
As Kokushibo lived for centuries continuously improving his swordsmanship through his Moon Breathing Breathing Style, eventually developing 16 different techniques at least by the time of the Infinity Castle Arc.

Note: Due to Kokushibo's Blood Demon Art, it is unknown how a human swordsman will perform these techniques. Furthermore, several techniques were performed with Kokushibo's longer sword.