细节
A BIZEN OSAFUNE TACHI
KAMAKURA PERIOD (CIRCA 1320), SIGNED BISHU [NO] JU OSAFUNE KAGE[MITSU]
Configuration (sugata): with longitudinal ridge line (shinogi-zukuri), shallow peaked back (iori-mune) and medium point (chu-kissaki); length (nagasa): 2 shaku, 6 sun, 1 bu (79cm.); curvature (sori): strong koshi-zori of 2.6cm.; increase in width of blade (fumbari): 1.0cm.
Forging pattern (jihada): itame mokume.
Tempering pattern (hamon): suguba notare with clove-like patterns (choji) in tight nioi, and 'legs' (ashi).
Point (boshi): notare-komi with ko-maru.
Tang (nakago). Shape (keitai): slender, tapering, shaved somewhat on the back and shortened (suriage); file marks (yasurime): slanted (katte-sagari) (later); end (nakagojiri): squared (kirijiri); holes (mekugi-ana): four (one plugged); signature (tachimei): Bishu [no] ju Osafune Kage--[suriage].
Shirasaya with attestation signed Kunzan (Homma Junji).
Accompanied by a juyo token certificate issued by the N.B.T.H.K., dated Showa 43 (1968).