Historically, katana (刀 or かたな) were one of the traditionally made Japanese swords (日本刀 nihontō)^[2][3] that were used by the samurai of ancient and feudal Japan.^[4] The katana is characterized by its distinctive appearance: a curved, single-edged blade with a circular or squared guard and long grip to accommodate two hands. https://en.wikipedia.org/wiki/Katana