i will not begin to explain you that is beater ~20000 times to get sharp just to look smart since a lot of people already know that.just that the katana is characterized by its distinctive appearance: a curved, slender, single edged blade, circular or squared guard, and long grip to accommodate two hands. It has historically been associated with the samurai of feudal Japan, and has become renowned for its sharpness and cutting ability, to the point that its purported cutting capabilities have reached mythical status.