Kusanagi no Tsurugi; grass-mowing sword
Alternate name for Ama-no-Murakumo no Tsurugi, one of the three Imperial regalia of Japan. The literal meaning 'grass-mowing sword' refers to the myth in which the sword was used to cut grass to escape a fire.
See also: 天叢雲剣
Kusanagi no Tsurugi is considered one of the three Imperial regalia.
In mythology, Susanoo took the Kusanagi sword from Yamata no Orochi.