How should I care for the golden blade finish long-term?

 Updated Mar 2026

Routine care is straightforward but important. Apply a thin coat of camellia oil or choji oil to the blade surface every two to three months using a soft cloth or dedicated nugui-gami cleaning paper — this prevents oxidation and keeps the finish from dulling. Avoid abrasive cloths or chemical cleaners, which can scratch or strip the surface treatment. Store the katana away from direct sunlight and in a low-humidity environment; prolonged UV exposure can gradually alter the finish tone. When rotating the piece for display cleaning or photography, handle the blade only with thin cotton gloves to prevent skin oils from leaving marks that may become difficult to remove over time.

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