BIZEN--OMIYA
A BIZEN OMIYA KATANA

Details
A BIZEN OMIYA KATANA
PROBABLY LATE NAMBOKUCHO PERIOD, SECOND HALF OF THE 14TH CENTURY

Configuration (sugata): with longitudinal ridge line (shinogi-zukuri), shallow peaked back (iori-mune) and large point (o-kissaki); length (nagasa): 2 shaku, 2 sun, 7.5 bu (69.0cm.); curvature (sori): koshi-zori of 1.4cm.; increase in width of blade (fumbari): 0.6cm.; carving (horimono): outside: futatsuji-hi; inside: futatsuji-hi in the lower half of the blade and maru-dome bo-hi in the upper half.
Forging pattern (jihada): wood grain (itame).
Tempering pattern (hamon): irregular undulations (gonome midare) in ko-nie with some ara-nie.
Point (boshi): midare-komi with eruptive hakikake.
Tang (nakago). Shape (keitai): o-suriage; file marks (yasurime): new (kiri-yasuri); end (nakagojiri): squared (kirijiri); holes (mekugi-ana): three (two overlapping); signature (mei): unsigned (mumei).

Shirasaya.

Accompanied by a tokubetsu kicho token certificate issued by the N.B.T.H.K., no. 348037, dated Showa 52 (1977); and a koshu tokubetsu kicho token certificate issued by the N.B.T.H.K., no. 18580, dated Showa 55 (1980).
Provenance
Kano Oshima, New York