Muramasa refers to a legendary Japanese swordsmith from the 16th century, known for creating exceptional blades. His swords are characterized by their sharpness, strength, and unique tempering process, which often resulted in a distinctive wavy pattern on the blade. The name Muramasa is also associated with a series of cursed swords, believed to bring misfortune to their wielders. This reputation has made Muramasa's creations highly sought after by collectors and enthusiasts, as well as a popular subject in Japanese folklore and media, often symbolizing both power and tragedy.