细节
A SOSHU KATANA
REGISTERED AS A TOKUBETSU JUYO TOKEN [EXCEPTIONALLY IMPORTANT SWORD]
Unsigned, Traditionally Attributed to Norishige, Late Kamakura Period (14th Century)
Sugata [configuration]: shinogi-zukuri [longitudinal ridge], chu-kissaki nobiru [slightly elongated medium point], mitsumune [tri-bevelled back]
Kitae [forging pattern]: a combination of itame [wood grain] with matsukawahada [pine-bark texure], with jinie [hard metal granules over the surface of the blade] and chikei [short lines of nie]
Hamon [tempering pattern]: broad suguha [straight temper line] with gentle notare [undulations], compact nie [hard metal granules], kinsuji [bright curved threadlike areas] and sunagashi [thick lines of nie]
Boshi [tip]: komaru [gently turned-back temper line]
Horimono [carvings]: a single bohi [groove] on each side continuing down to the heel
Nakago [tang]: osuriage [substantially shortened] with kiri yasurime [horizontal file marks], two mekugi-ana [holes for retaining pegs], the heel cut off at right angles
Fitted with a two-tier gilt habaki [collar]
Shirasaya [plain wood scabbard] with inscription by Honma Kunzan, dated 1979
Black-lacquered katana koshirae [set of mounts] comprising: black-lacquered saya [scabbard] carved in a spiral; tsuka [hilt] covered in black sharkskin and wrapped in brown stencilled leather forming a lozenge pattern; gold-ground menuki [hilt decorations] each worked as three conjoined kiri-mon [paulownia crests]; gold-ground kashira [fitting at the end of the hilt] and fuchi [hilt collar] carved with wave patterns, signed Hakuosai Kazan with a kao [cursive monogram]; the koikuchi [scabbard mouth], kurikata [cord fitting], kojiri [scabbard butt], kozuka [knife] and kogai [skewer] in matching materials and designs, the kozuka and kogai each signed Hakuosai Kazan; gold-ground circular tsuba [hand guard] also with wave patterns, signed Hakuosai Kazan with a kao, Showa Period (20th Century), diameter 2 11/16in. (6.9cm.); brown stencilled leather hilt binding, Edo Period
Overall length of blade: 32¼in. (81.9cm.)
Nagasa [length from tip to beginning of tang]: 25in. (63.6cm.)
Sori [curvature]: 11/16in. (1.8cm.)
Motohaba [width at start of tempered edge]: 1 13/16in. (3cm.)
Sakihaba [width before tip]: 7/8in. (2.2cm.) (2)