Folded Steel Katana is usually known as Damascus Steel Katana. Folded Steel Katana involves folding the steel repeatedly to remove impurities from the iron, resulting in a grain texture (Hada) on the blade and quality steel.
Modern steel is already of high quality, but the folding process is said to boost toughness and resistance, as well as the beauty of the blade due to the folded steel pattern, which makes it not just a piece of artwork but also a gorgeous present for a friend or loved one.