Kusanagi-no-tsurugi (Japanese: è‰è–™ã®å‰£) 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å¢é›²å‰£, lit. "Heaven's Cloud-Gathering Sword") but it is more popularly called Kusanagi-no-tsurugi (è‰åˆ‡æ–ã®å‰£ lit.