Metal Alchemy is the ultimate ability of Sunate Nikakusa. Due, to his affinity with metal chakra and having spent years of research, Sunate has gained the ability to control and manipulate metals around him. This allows him to manipulate electrons, molecular vibrations and atomic bonding. Hence, allowing him to give any shape or size to a specific metal. This is best seen when he turns his sword into a large spear of hot iron, which allowed him to destroy his enemies weapons. He can re-shape and absorb almost any metal. He further explains that this technique is the basis of his techniques like Metal Release Restoration and Iron Oxidation. Accordingly, he was able to modify pieces of copper into drilling bullets of copper and hurl them towards the enemy. This technique has one primary weakness, that is, it only allows to manipulate, reform, absorb and resize metals but cannot grant the ability to create metals.