According to Demon Slayer's Creator, Breathing Styles Are Not Real
The various fighting styles in Demon Slayer are developed through the use of distinct Breathing Styles. The information explains how Murata became aDemon Slayer and his use of the Water Breathing style. Note: Swordsmen don’t actually unleash water attacks. People who see this just think they see and feel it. Fans should recognize that the visual effects associated with each Breathing Style are not real. These styles and forms are designed to enhance the impact of their sword techniques....