Hyakushiki-Masamune, also known as Masamune 100, may refer to:
- The weapon from Final Fantasy Tactics Advance.
- The weapon from Final Fantasy Tactics A2: Grimoire of the Rift.
Hyaku shiki means "100 seasons" in Japanese.
Masamune Okazaki, who is the most defined out of the many legendary Japanese blacksmiths of the Kamakura Era, where it is considered the greatest/golden age of katana for having pioneered long lost and secretively kept methods allowing for both aesthetic and artistic brilliance and durable design to never fail their wielder. His works were of the Soshu tradition, and are defined by prominent temper lines of nie, golden lightning like lines of kintsuji, dark merging grain lines of chikei to help emphasize the temper line, and of his famous forging process of soshu kitae, historically proven and renowned for being the strongest method for the body of the blade; however, many of his works lack signatures, which was common for high class blacksmiths in service to nobility. His works were often compared to those of Muramasa, though always the better of the two. According to legend, Masamunes are marks of an internal peaceful and calm warrior, the exact opposite of Muramasas.The Masamune is named after