IRODORI means color scheme in Japanese. This knife's handle and sheath are red lacquer finish. The beautiful color scheme must fascinate you. The blade is made of 15 layers of blue Damascus steel. The knife also includes a Japanese traditional-style wooden scabbard sheath with leather belt loop and metal accents. Blue Steel: Called "Aogami" in Japan, is made by adding chromium and tungsten to white steel making it more durable with greater edge retention. These knives make a great collectible piece or an everyday work knife.