Kusanagi-no-tsurugi (Japanese: 草薙の剣) is a legendary Japanese sword as important to Japan's history as Excalibur is to Britain's. It is actually called Ame-no-murakumo-no-tsurugi (天叢雲剣, lit. "Heaven's Cloud-Gathering Sword") but it is more popularly called Kusanagi-no-tsurugi (草切断の剣 lit.