Yata + Totsuka artifacts are ethereal weapons. They do not exist in the physical world. It's inseperable from Itachi as Manga time again proves Sacred Weapons are sentient like Kusanagi(Orochimaru can remotely control it), Samehada, Seven Swordsmen's Blades. Samehada only follows it's master. Totsuka and Yata likewise know thier Master and doesn't allow not souls/physical matter to wield them.