Tsurugi (sword)
A tsurugi is a Japanese sword, akin to the Chinese jian. The word is used in the West to refer to a specific type of Japanese straight, double-edged sword used in antiquity.Kusanagi-no-Tsurugi
The current name for the sword which is one of the Three Imperial Regalia of Japan is "Kusanagi-no-Tsurugi".