細節
A BIZEN TACHI
REGISTERED AS A JUYO TOKEN [IMPORTANT SWORD]
Signed Bizen no kuni no junin Sakon no shogen Kageyori tsukuru and dated 1300, Late Kamakura Period
Sugata [configuration]: shinogi-zukuri [longitudinal ridge], ko-kissaki [small point], iori-mune [shallow peaked back]
Kitae [forging pattern]: tight ko-itame [fine wood grain] with fine jinie [hard metal granules over the surface of the blade]
Hamon [tempering pattern]: hoso-suguha [straight, narrow line]
Boshi [tip]: sugu ni komaru [straight and then gently turned-back temper line]
Nakago [tang]: ubu [unaltered] with shallow katte sagari yasurime [diagonal file marks sloping towards the back of the tang], one mekugi-ana [hole for the retaining peg], kurijiri [rounded heel], signed one on side Bizen no kuni no junin Sakon no shogen Kageyori tsukuru [made by Sakon no shogen Kageyori, resident in the province of Bizen] and dated on the other Shoan ninen juichigatsu hi [a day in the eleventh month of the second year of Shoan (1300)]
Fitted with a two-tier gilt habaki [collar]
Shirasaya [plain wood scabbard] signed by Honma Kunzan and dated January 1979
Black-lacquered uchigatana koshirae [set of mounts] comprising: black-lacquered saya [scabbard]; tsuka [hilt] covered in white sharkskin and wrapped in brown leather forming a lozenge pattern; shakudo [copper-gold alloy] menuki [hilt decorations] worked in relief iroe [soft-metal decoration]; black-lacquered horn kashira [fitting at the end of the hilt], koikuchi [scabbard mouth], kurikata, kaerizuno [cord fittings] and kojiri [scabbard butt]; shakudo fuchi [hilt collar] worked in relief; oval shakudo nanako [granulated ground] tsuba [hand guard] worked in gold around the edge with kiri-mon [paulownia crests], diameter 2¾in. (7cm.); and shakudo nanako kozuka [knife] and kogai [skewer] worked in relief iroe with similar decoration, with brown leather hilt binding, modern
Overall length of blade: 34 5/16in. (87.2cm.)
Nagasa [length from tip to beginning of tang]: 26 3/8in. (67cm.)
Sori [curvature]: 11/16in. (1.8cm.)
Motohaba [width at start of tempered edge]: 1 1/16in. (2.7cm.)
Sakihaba [width before tip]: 9/16in. (1.5cm.) (2)