Akkuai-uo, originally named Kunshu, was the Ancestral Sword of the Hantei. It was wielded by the Hantei for over a milennia before it was lost in the Shadowlands by Hida Yakamo. For a time it was wielded by Daigotsu, followed by Iuchiban, until it was recovered by Mirumoto Katsutoshi who returned it to Rokugan and the new Empress, Iweko I.