What's the best way to maintain a T10 tanto for long-term display?
Updated Mar 2026
Carbon steel requires periodic maintenance to prevent surface oxidation, particularly in humid environments. For display pieces, apply a thin layer of acid-free mineral oil or traditional choji oil to the blade every two to three months using a soft, lint-free cloth. Avoid touching the polished surface directly — skin oils accelerate oxidation on carbon steel. The lacquered saya should be stored away from direct sunlight, which can cause the lacquer finish to fade or crack over time. When storing the tanto for extended periods, keep it in the saya in a horizontal orientation inside a low-humidity environment. A silica gel packet placed nearby — not in direct contact with the blade — helps stabilize ambient moisture. These simple steps will preserve both the blade finish and the koshirae fittings in display-ready condition for many years.