The 'Ama no Murakumo no Tsurugi' (also called 'Ame no Murakumo no Tsurugi', translated literally as, "Sword of the Gathering Clouds of Heaven) is one of the 'Sanshu no Jingi' (the Three Imperial Regalia) and a 'shintai' (an object of worship housed in a Shinto shrine and believed to contain the spirit of a deity) of the Atsuta-jingu Shrine.
天叢雲剣（あまのむらくものつるぎ、あめのむらくものつるぎ）とは、三種の神器の一つで、熱田神宮の神体である。