How should I maintain the bronze fittings on my katana?

 Updated Feb 2026

Bronze fittings naturally develop a patina over time, which many collectors consider desirable because it adds depth and historical character. If you prefer to keep the original bright finish, wipe the tsuba, fuchi, and kashira periodically with a dry microfiber cloth to remove fingerprint oils. For a deeper clean, use a small amount of non-abrasive metal polish on a soft cloth and buff gently. Avoid household chemicals or abrasive pads, which can scratch cast details. The steel blade requires separate care: apply a thin film of choji oil or light mineral oil after handling, and store the katana in a low-humidity environment to prevent moisture from affecting either the steel or the bronze surfaces.

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