Kusanagi no Tsurugi

Kusanagi no Tsurugi is a legendary Japanese sword that is important for the history of Japan and is just as important as the history of the sword Excalibur for the British people, and is one of the three Imperial Regalia of Japan.
Kusanagi no Tsurugi was originally called Ama-no-Murakumo-no-Tsurugi ( "Sword of the Gathering Clouds of Heaven") but his name later changed to become more popular Kusanagi-no-Tsurugi ( "Grass Cutting Sword").