How should I care for a Damascus ninjato kept on display?
Updated Mar 2026
Long-term display care for a Damascus ninjato comes down to a few consistent habits. Keep the blade stored in its saya whenever it is not being actively examined, since open-air exposure accelerates surface oxidation - particularly in humid environments. Every two to three months, apply a light coat of choji oil or food-grade mineral oil to the blade, spreading it evenly with a soft cloth and wiping away any excess. Avoid handling the blade surface with bare hands; the natural oils and salts from skin contact leave residue that can cause discoloration over time. For the saya, keep it away from direct sunlight and heat sources, both of which can cause lacquer to crack or yellow. When mounting the piece horizontally in a display rack, use padded or fabric-covered supports to protect the lacquer at contact points. These simple steps will preserve both the blade patterning and the marble finish across many years of display.