Have you ever seen real samurai swords? They are reallly really cool and beautiful! Katana or nihonto (Japanese name of samurai sword), is known throughout the world for its beauty and sharpness. You can see the artistically decorated scabbard, and also the wave pattern of the blade called hamon, which are the characteristics of katana.
Historically, katana (刀?) were one of the traditionally made Japanese swords (日本刀 nihonto?) that were worn by the samurai class of feudal Japan, also commonly referred to as a "samurai sword". 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. Katana are renowned for sharpness and strength.