How should I store and maintain a lacquered hardwood saya?

 Updated Mar 2026

Black lacquer saya are durable but sensitive to humidity extremes. Ideal storage conditions are between 40–60% relative humidity — too dry and the lacquer can crack; too moist and the wood may swell, making the blade difficult to draw cleanly. Avoid placing the saya in direct sunlight for extended periods, as UV exposure will gradually dull the lacquer sheen. For the blade inside, apply a light coat of choji oil (or a food-grade mineral oil substitute) every few months using a soft cloth or nuguigami paper. When drawing or sheathing for display purposes, always support the saya at the koiguchi (mouth) to avoid stressing the wood grain around the opening.

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