Fujin holding the Kusanagi.
The Kusanagi-no-Tsurugi ("Grass-cutting Sword") is a legendary sword in Japanese myth and one of the Three Imperial Sacred Treasures. It is a symbol of the Japanese emperor's legitimacy to rule and represents valor. After slaying Yamato no Orochi, the god Susano-o found this sword in one of the eight tails of the gigantic serpent. It was originally known as Ame-no-Murakumo-no-Tsurugi ("Sword of the Gathering Clouds of Heaven"). Susano-o did not hold onto the sword for a long time, however, and gave it away to his sister Amaterasu as an apology which allowed him to return to the gods from his exile. In time, Amaterasu gave the sword to Yamato Takeru, a young prince either related to her or one of her highest priestesses. During a battle where the grass was set on fire, he used the sword to cut away the burning grass, instead re-directing the fire to his enemies. This resulted in the new name of "Grass-cutting sword".
In Mortal Kombat[]
This weapon appears for the first time in the series in MK11, wielded by Fujin. The Kusanagi is a short double edged sword that is used in tandem with its scabbard when in battle. With the sword, Fujin is able to make crescent shaped wind blades via slashing the air. He can also use the scabbard as a blunt weapon much like a club or baton and levitate it with his wind powers.