How should I display and maintain a Damascus ninjato?
Updated Feb 2026
For display, mount the ninjato horizontally on a wooden sword stand in a climate-controlled room, ideally between 40–55% relative humidity. High moisture accelerates oxidation on high-carbon Damascus steel, so avoid basements, garages, or areas near exterior walls that may sweat in seasonal changes. Every four to six weeks, apply a thin coat of choji oil — or food-grade mineral oil as a substitute — using a soft flannel cloth. Wipe along the flat of the blade in one direction, never across the edge. If you notice light surface haze forming, a gentle pass with an uchiko powder ball before oiling will lift the oxidation without scratching the pattern. Always handle the blade with clean, dry hands or cotton gloves, since fingerprint oils are mildly acidic and can etch the layered steel over time.