A Bizen Katana
Signed Bishu Osafune [No] Ju Yokoyama Sukekane saku, Tomonari Gojuhachi Dai Mago, and Oju Gannen Nigatsu, Edo Period (19th century)
Sugata [configuration]: hon-zukuri, iori-mune, slight
koshizori curve, chu-gissaki
Kitae [forging pattern]: tight ko-itame, fine ji-nie masame on shinogi-ji
Hamon [tempering pattern]: rounded gunome with gunome choji in groups of three
Boshi [tip]: slight notare-komi then suguha and ko-maru
Nakago [tang]: ubu, one mekugi-ana, katte-sagari file marks, sharp ha-agari kurijiri
Habaki [collar]: single copper
Nagasa [length of blade]: 70.5cm.
Koshirae [mounting]: in shirasaya
A Bizen Katana
Signed Bishu Osafune [No] Ju Yokoyama Sukekane saku, Tomonari Gojuhachi Dai Mago, and Oju Gannen Nigatsu, Edo Period (19th century)
Sugata [configuration]: hon-zukuri, iori-mune, slight
koshizori curve, chu-gissaki
Kitae [forging pattern]: tight ko-itame, fine ji-nie masame on shinogi-ji
Hamon [tempering pattern]: rounded gunome with gunome choji in groups of three
Boshi [tip]: slight notare-komi then suguha and ko-maru
Nakago [tang]: ubu, one mekugi-ana, katte-sagari file marks, sharp ha-agari kurijiri
Habaki [collar]: single copper
Nagasa [length of blade]: 70.5cm.
Koshirae [mounting]: in shirasaya