How should I care for a ninjato displayed long-term at home?
Updated Mar 2026
For long-term display, the blade should be lightly coated with choji oil or a neutral mineral oil every three to six months to prevent oxidation, applied with a soft, lint-free cloth. Avoid fingerprints on the blade surface, as skin oils accelerate spotting. The beige hardwood saya should be stored away from direct sunlight, which can bleach or dry out the finish over time, and away from heating vents that introduce low-humidity air. A horizontal sword stand or wall mount designed for straight-bladed swords will distribute weight evenly and prevent stress on the saya opening. Periodically check that the blade fits snugly in the saya without forcing — wood can expand slightly with humidity changes.