Sadakage

The Sadakage (貞影, Faithful Shadow) is a dual-edged longsword of the Hiramekarei series, created by the the Shinobi Union and the primary sword of Zaizen Asakura, used in conjuction with his clan's style, the Asakura Double-Edged Art (朝倉諸刃皆伝, Asakura Moroha Kaiden).