What is the correct way to store a tachi for long-term display?
Updated Mar 2026
Tachi swords should be stored edge-down in the saya when not on display — this is the historically correct orientation and also protects the blade's edge geometry from contact pressure over time. For display mounting, use a horizontal rack that supports both the saya and the tsuka without stress points. Apply a thin coat of high-quality camellia oil (choji oil) to the blade every two to three months, or more frequently in humid climates. Avoid display locations near heating vents, direct sunlight, or coastal air exposure, all of which accelerate surface oxidation. When handling the blade for maintenance, use clean cotton gloves or a soft cloth — skin oils are mildly acidic and can initiate surface spotting on carbon steel over extended periods.