How should I store and maintain a display katana long-term?
Updated Mar 2026
Proper storage starts with orientation - katana displayed horizontally or on a vertical stand should rest with the edge facing upward when on a traditional rack, following the convention of Japanese sword presentation. For longer storage inside the saya, lay the sword flat in a low-humidity environment. The single most important maintenance habit is a light application of choji oil (or a food-grade mineral oil substitute) to the blade every two to three months, or more frequently in humid climates. Apply with a soft cloth or dedicated wiping paper, distributing a very thin, even coat across the entire blade surface. Avoid fingerprints on bare steel - the oils and salts from skin accelerate oxidation. For blades with a real hamon, keeping the steel clean and lightly oiled also helps the temper line remain visually crisp over time. The saya interior should be inspected periodically for dust or moisture, and the tsuka wrap checked for loosening at the ends.