Kesshōken

Kesshōken (血傷剣, Blood Scar Sword) is the signature blade of Muketsu, having been forged on his request by Yoshihira following Takumi Village's subservience to Amegakure. It is a rather strong sword given that it is an extension of the Blood Release and makes him conserve his chakra for higher-leveled techniques for only the strongest of opponents.