This is a koshirae (mounting) for an aikuchi tanto. The koshirae features a gold nashiji lacquer finish. It is a decorative and functional piece for a tanto blade.
NihontoWatchEdo
Edo
We could not find an authenticity certificate on the seller’s listing. Japanese swords and fittings are normally papered by the NBTHK (or the NTHK). Without one, the attribution is the seller’s own assessment and has not been independently verified — treat it with caution and ask the dealer about certification before buying.
