Katana (or Katana) (Japanese: 刀, English: Katana) is the name of a type of Japanese sword that has been used by samurai since the 13th century. A katana from the 16th and 17th centuries with Saya One of the outstanding features of Katana is its beautiful shape and extraordinary strength. Throughout history, its form has changed slightly, but its basic principles remain unchanged. One of the characteristics of Katana is the shape of its blade curve. Also, one side of the sword (its inner edge) is very sharp, and basically the back of the sword is thicker than the sharp and winning part. Katana is primarily designed to cut body parts to injure the enemy; For this reason, each blade is specially designed to be as effective as possible.