The Samurai Sword has a history going back as far as the 7th century and belongs to the Samurai warrior class in Japan. Its basic characteristic feature is its long and slightly curved slim blade.
The need to make such a sword arose during the 7th - 9th centuries when the Emperor of Japan needed to take some drastic action to quell the rebellions that were rampant during this time. The sword was a highly lethal weapon, and, was used by the powerful clan leaders, to attack rebel forces, both on horseback and, also on land. Constant fighting amongst the clans created a need for the assortment of tribal groups to form a bigger group for safety. They eventually channelled their energies towards settling down by marrying into aristocracy and compelling the Samurai to obtain an education to accomplish his goals.
The invention of the Samurai Sword started off this way, and throughout ancient Japanese history the sword has been used with deadly precision to either maim or kill. However, it did not achieve its sharp edge until master Japanese sword smiths developed a steel metal that gives this sword its lethal cutting edge. The earlier Samurai Swords were made from carbonized-iron that had a rough edge and was brittle. The Japanese sword smiths found a way of creating a composite blade that was tensile, had a strong edge but maintained the flexibility required during combat by fusing two layers of hard and soft steel. This model of making a sharp sword created a Samurai Sword that was astonishingly adept for its' deadly purpose.
Even today, the Samurai Sword, is a highly sought after weapon, and a highly regarded work of art associated with a unique and compelling culture.