Minato gave one of these kunai to his pupil Kakashi Hatake, as a gift for his promotion to Jōnin. During the war between Konohagakure and Iwagakure, the ninja from the former threw these kunai all over the battlefield, in order for Minato to teleport all over the place to slay his enemies instantly. He also kept at least one of these blades at his home, so he can teleport there.