Object Title

Sword (katana)

Sword (katana)



Object Number



Presented by a private donor, 10 July 2002. Formerly part of the collection of her husband.

Physical Description

The blade is o suriage, of koshizori shape and iorimune. The hada is an undulating masame with some areas of itame, the hamon being an irregular suguba tending to shallow gonome in nie deki. There are inazuma and chikei. The boshi is kaen. The remains of the tang is long and tapering with 3 holes, cut off square with horizontal, kiri, file marks.

The blade has been fitted with a new gilt habaki and is accompanied by a set of army mounts.


Dimensions: The nagasa is 735 mm, the sori being 20 mm, the length of tang being 226 mm. The width at the machi is 31 mm, the width at the yokote being 20 mm, the length of the kissaki being 30 mm. The length of the shirasaya hilt being 242, the length of the scabbard being 791 mm, the overall length of the shirasaya being 1033 mm. Weight: blade 0.79 kg shirasaya 0.396 kg.

Inscriptions and Marks



Places Japan


There exists an origami for this blade issued by Nihon ToKen Hozon Kai, issued Heisei 7th year (1995), stating that the blade is the work of Sekishu (Iwami) Naotsuna den. Hawley, 'Japanese Swordsmiths', lists 5 smiths using that name in that province whose dates range from 1334 to 1688. Deryk Ingham’s initial research suggested that the blade could be Shodai (working period thought to be in the 1330s). Subsequent opinions and study have revised this slightly, assessing the probable date of the sword as Eiwa period, 1375-1379, suggesting that this blade is possibly by the second generation.