How should I store and maintain a display tachi sword?
Updated Feb 2026
Proper storage significantly extends the life of a display tachi. Keep the blade lightly coated with a thin layer of choji oil (traditional clove-based sword oil) or a neutral mineral oil to prevent oxidation, reapplying every two to four months depending on humidity levels in your environment. Store the sword in its saya (scabbard) when not on display to protect the surface from dust and accidental contact. Avoid storing in sealed cases without moisture control — fluctuating humidity causes wood components, including the saya and tsuka, to expand and contract, potentially loosening the fit over time. Silica gel packs in a display case help regulate moisture. When handling, use a soft cotton cloth or gloves to prevent oils from your skin contacting the blade surface, which can cause spotting over time.