Katana by Taikei Naotane, one of the great shinshintō smiths of Edo and the leading pupil of Suishinshi Masahide, whose school championed a return to Kamakura-period forging. The blade, dated the second month of Tenpō 6 (1835), belongs to what the original seller considers the smith's peak period. It is shinogi-zukuri with an iori-mune and chū-kissaki, with a nagasa of 71.4 cm and 2.2 cm of sori, in a tachi silhouette with pronounced koshi-zori. According to the original seller, the jigane is a tightly forged itame with abundant ji-nie and chikei, and the hamon a gunome-midare mixed with ko-gunome, chōji and pointed elements, with kinsuji, sunagashi and tobiyaki; the photographs show the undulating outline of the hamon along the whole blade. The tang is ubu, with one mekugi-ana, a kurijiri tip and sujikai yasurime; it is signed in tachi-mei 造大慶直胤 (Taikei Naotane tsukuru) with a kaō and dated on the ura 天保六年仲春 (Tenpō rokunen chūshun). It has a double habaki of gold-foiled copper. Designated Jūyō Tōken at the 60th NBTHK session, it is kept in shirasaya with a sayagaki by Hon'ami Kōson. It has no koshirae.