„Kinsoku Mitateai“ is the term for a group of urushi lacquer that imitates the surface of metal. Tetsu-Nuri or „tsuki-nuri“ is achieved with iron powder and urushi

Tamahagane is a type of steel made in the Japanese tradition. The word tama means „round and precious“, like a gem. The word hagane means „steel“. Tamahagane is used to make Japanese swords, knives, and other kinds of tools.