Three Sword Style, One Piece Wiki

Three Sword Style, is a unique style of triple wielding swordsmanship where the practitioner wields three katanas; one in each hand and the third in the mouth. There are many different techniques for this sword style, including direct hit attacks (Oni Giri) and compressed air projectile attacks (Hyaku Hachi Pound Ho). Roronoa Zoro is the world-famous swordsman of the Straw Hat Pirates who created this style; using his original Two Sword Style as the basis of most of Three Sword Style techniques

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