Flying Thunder God Kunai, Narutopedia

Flying Thunder God Kunai (飛雷神クナイ, Hiraishin Kunai) are custom-made kunai (特注クナイ, tokuchū kunai) and signature tools of Minato Namikaze, who uses them in conjunction with his Space–Time Ninjutsu: the Flying Thunder God Technique. They differ from a standard kunai in that they have three blades instead of one and the handle (which is thicker than normal) serves as the "marker" for Minato's teleportation ability. Minato also said that these blades are a bit heavier than a normal kunai. Their prongs

Nendoroid Minato Namikaze (Naruto Shippuden): Kikatek UK

Flying Thunder God Kunai, Narutopedia

Naruto Minato Namikaze Flying Thunder God Weapon Metal Kunai AL1707

Flying Thunder God Kunai - Fire and Steel

Flying Thunder God Cast Metal Replica Anime Namikaze Triple-Prong Kunai Knife

Flying Thunder God — Second Step, Narutopedia

Flying Thunder God Kunai - Fire and Steel

Naruto Minato Namikaze Flying Thunder God Weapon Metal Kunai AL1707

Who is the most-powerful shinobi? : r/Naruto