Historically, katana (刀) were one of the traditionally made Japanese swords (日本刀, nihontō) that were used by the samurai of feudal Japan. Modern versions of the katana are sometimes made using non-traditional materials and methods. The katana is characterized by its distinctive appearance: a curved, slender, single-edged blade with a circular or squared guard and long grip to accommodate two hands.
== History ==
The production of swords in Japan is divided into specific time periods:
Jokoto (ancient swords, until around 900 A.D.)
Koto (old swords from around 900–1596)
Shinto (new swords 1596–1780...