Do the blue handle wrappings require any maintenance over time?

 Updated Mar 2026

Cord-wrapped handles — known as tsuka-ito — can loosen marginally with temperature and humidity changes if the underlying same (ray skin) shifts. For display pieces, the best practice is to avoid handling the tsuka frequently with bare hands, as skin oils gradually break down natural cord fibers. If you display the piece in a low-humidity environment, occasional very light misting of the surrounding air (not the handle directly) helps prevent the cord from drying and becoming brittle. Inspect the wrap annually for any loosening near the end caps. Rewrapping is possible if needed, and the diamond pattern on these handles — known as hishi-maki — is one of the more straightforward wrapping styles to replicate if restoration becomes necessary.

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