Moon Breathing is a Breathing Style that mimics the Moon, specifically the crescent shape of the moon as it waxes and wanes and the erratic behavior of passing moonlight, and replicates it with the user's movements, techniques and abilities. Most, if not all, known techniques and forms are standard yet varied swordsmanship techniques that focus on swift and powerful strikes which blends both offense and defense. Most sword slashes performed follow the shape and pattern of crescent moons.
Due to Kokushibo's centuries-long existence, he had created the most number of forms out of all known Breathing Styles, having developed a minimum of 16 techniques by the time of the events within the Infinity Castle, of which 11 were demonstrated.
Note: Since all of Moon Breathing's depicted techniques are performed either with the help of or in conjunction with his Blood Demon Art, it is unknown how a human swordsman will perform these techniques. Moreover, several of the forms were performed with an elongated version of Kokushibo's flesh katana.
First Form: Dark Moon, Evening Palace (壱いちノ型かた 闇やみ月づき・宵よいの宮みや, Ichi no kata: Yamizuki - Yoi no Miya?) - Kokushibo draws his katana and performs a singular horizontal slash following a crescent shape, creating numerous chaotic crescent blades along its path, before sheathing it back into his scabbard. This technique is extremely reminiscent of Iaijutsu.
Second Form: Pearl Flower Moongazing (弐にの型かた 珠しゅ華かノ弄ろう月げつ, Ni no kata: Shuka no Rōgetsu?) - Kokushibo performs three crescent-shaped slashes while releasing a multitude of crescent moon blades along with them.
Third Form: Loathsome Moon, Chains (参さんノ型かた 厭えん忌き月づき・銷つがり, San no kata: Enkizuki - Tsugari?) - Kokushibo performs two extremely broad crescent-shaped slashes directly in front of him, from which a storm of smaller crescent moon blades are released.
Fifth Form: Moon Spirit Calamitous Eddy (伍ごノ型かた 月げっ魄ぱく災さい渦か, Go no kata: Geppaku Saika?) - Kokushibo creates multiple long and curved slashes layered over one another, essentially creating a vortex of crescent moon blades. As stated by Sanemi Shinazugawa, this technique was performed without Kokushibo swinging his katana.
Sixth Form: Perpetual Night, Lonely Moon - Incessant (陸ろくノ型かた 常とこ夜よ孤こ月げつ・無む間けん, Roku no kata: Tokoyo Kogetsu - Muken?) - Kokushibo rapidly performs a multitude of curved slashes several meters in front of him that releases a wild barrage of crescent moon blades capable of slicing up the surroundings.
Seventh Form: Mirror of Misfortune, Moonlit (漆しちノ型かた 厄やっ鏡きょう・月づき映ばえ, Shichi no kata: Yakkyō - Zukibae?) - Using his altered katana, Kokushibo performs a frontal crescent-shaped slash with couples of crescent moon blades, that unleashes numerous straight slashes with crescent moons interlaced, that expand outward through the ground.
Eighth Form: Moon-Dragon Ringtail (捌はちノ型かた 月げつ龍りゅう輪りん尾び, Hachi no kata: Getsuryū Rinbi?) - Using his altered katana, Kokushibo performs a extremely wide, long-ranged curved slash that leaves dozens of crescent moon blades along its path.
Ninth Form: Waning Moonswaths (玖くノ型かた 降くだり月づき・連れん面めん, Ku no kata: Kudarizuki - Renmen?) - Using his altered katana, Kokushibo performs multiple downward curved slashes, all in close proximity, that leave numerous crescent moon blades along its path.
Tenth Form: Drilling Slashes, Moon Through Bamboo Leaves (拾じゅうノ型かた 穿せん面めん斬ざん・蘿ら月げつ, Jū no kata: Senmenzan - Ragetsu?) - Using his altered katana, Kokushibo creates three rotating circular saw-like slashes with crescent moon blades following their path.
Fourteenth Form: Catastrophe, Tenman Crescent Moon (拾じゅう肆しノ型かた 兇きょう変へん・天てん満まん繊せん月げつ, Jū Shi no kata: Kyōhen - Tenman Sengetsu?) - Using his altered katana, Kokushibo performs a multitude of curved circular slashes which expand outward in every direction that incrementally grow in size, essentially creating an omni-directional vortex of crescent moon blades that whirls around him. This technique is visually near-identical to Fifth Form: Moon Spirit Calamitous Eddy, albeit with much greater range.
Sixteenth Form: Moonbow, Half Moon (拾じゅう陸ろくノ型かた 月虹げっこう・片かた割われ月づき, Jū Roku no kata: Gekkō - Katawarezuki?) - Using his altered katana, Kokushibo swings outward, sending six curved slashes crashing down in front of him with numerous crescent moon blades, powerful enough to leave craters in their wake.
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