Key Points

- Masamune and Muramasa were the greatest swordsmiths of their eras, and perhaps all time 

Brief Bio 

Gorō Nyūdō Masamune was a medieval Japanese blacksmith widely acclaimed as Japan's greatest swordsmith. He created swords and daggers, known in Japanese as tachi and tantō, in the Sōshū school. However, many of his forged tachi were made into katana by cutting the tang (nakago) in later times ("suriage"). For this reason, his only existing works are katana, tantō, and wakizashi. No exact dates are known for Masamune's life. It is generally agreed that he made most of his swords between 1288 and 1328. Some stories list his family name as Okazaki, but some experts believe this is a fabrication to enhance the standing of the Tokugawa family.

Muramasa, commonly known as Sengo Muramasa (千子村正), was a famous swordsmith who founded the Muramasa school and lived during the Muromachi period (14th to 16th centuries) in Kuwana, Ise Province, Japan (current Kuwana, Mie).

In spite of their original reputation as fine blades favored by the shōgun Tokugawa Ieyasu and his vassals, the katana swords made by Muramasa gradually became a symbol of the anti-Tokugawa movement. Furthermore, in lore and popular culture from the 18th century, the swords have been regarded as yōtō (妖刀; "wicked katana"). It has also been told that once drawn, a Muramasa blade has to draw blood before it can be returned to its scabbard, even to the point of forcing its wielder to wound himself or commit suicide. Thus, it is thought of as a demonic cursed blade that creates bloodlust in those who wield it.