The Kusanagi is a legendary sword in Japanese mythology, often associated with the Shinto deity Susanoo. According to the myth, Susanoo discovered the sword in the tail of an eight-headed serpent called Yamata no Orochi after defeating it. The sword is considered one of the three sacred treasures of Japan, symbolizing power and authority. In addition to its mythological significance, the Kusanagi has been referenced in various forms of Japanese culture, including literature and anime. It is often depicted as a powerful weapon, embodying the spirit of the warrior and the divine, and is sometimes linked to the imperial family of Japan.