Kusanagi-no-Tsurugi(草薙の剣) is a legendary Japanese sword and one of three Imperial Regalia of Japan. It was originally called Ame-no-Murakumo-no-Tsurugi(天叢雲剣, "Sword of the Gathering Clouds of Heaven"), but its name was later changed to the more popular Kusanagi-no-Tsurugi ("Sword Cutting Grass").