Breath of the Sun

The Breath of the Sun (の) is an as-of-yet-unseen style of swordsmanship. It was utilized by the first Demon Slayer and serves as the basis for other Breath Styles taught by the Demon Slaying Corps, that eventually branched out into the Breath of Flames, Breath of Water, Breath of Wind, Breath of Stone, and Breath of Thunder, which branched out into even more breath styles themselves. While these styles were derived from Breath of the Sun, the Dance of the Fire God, while not the same as the Breath of the Sun, was made by Sumiyoshi (Tanjiro’s ancestor) under the tutelage of Yoriichi Tsugikuni to be a breath style as close as possible to Breath of the Sun.

Trivia

 * The kanji,, for "Sun", has the same pronunciation as the kanji , which means "Fire".