How should I store a white-saya katana to prevent discoloration?
Updated Mar 2026
White and light-colored saya are more susceptible to visible discoloration than darker finishes, so storage environment matters more than it might for a black or brown piece. Keep the katana horizontally on a display stand away from direct sunlight, which causes lacquer to yellow and PU leather to fade or crack over time. Avoid rooms with high humidity fluctuations — a consistent relative humidity between 45% and 55% is ideal. For lacquer saya, a soft microfiber cloth wipe-down every few weeks removes dust and skin oils that can dull the surface. PU leather saya benefit from occasional application of a non-petroleum leather conditioner to prevent drying and surface cracking. The blade itself should be lightly wiped with a clean cloth and a small amount of mineral oil or choji oil periodically to prevent any surface oxidation, working from the spine outward toward the edge rather than along the length.