This is an unsigned Ken (double-edged sword) attributed to Yamato Koken, dating back to the early Kamakura period. It features a classic form with a slightly wide body, narrowing towards the middle, and a straight hamon with small ashi. The blade comes with a copper habaki and shirasaya, and is accompanied by a Tokubetsu Kicho Token certificate from the NBTHK.
NihontoWatchmumei · Yamato Koken · Kamakura · nagasa 32.2cm
The Kamakura period (1185 to 1333)
Nearly every later authority calls Kamakura the golden age of the sword: the first warrior government as patron, the great traditions at full strength simultaneously, and, tradition holds, the finest smiths of the realm rotating through Go-Toba’s court.
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.
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