A koto katana (long sword)
By Kuniyasu, Nanbokucho period (1336-1392), 14th centuryOf elegant shinogi-zukuri form with ko-gissaki and shallow koshi-zori, narrow suguba of nioi with kaeri-ashi, itame-hada, the suriage nakago with katte-sagari yasuri and two nakago-ana signed Kuniyasu; in shirazaya with sayagaki. The blade: 75.2cm (29 5/8in).
注脚
The sayagaki reads Soshu Daishinbo Kuniyasu cho nishaku gosun [...] (Daishinbo Kuniyasu of Sagami Province, length two shaku five sun [...]).