The blade of shinogi-zukuri form, with broad notare-ha of nie and nioi, mokume-hada, the ubu-nakago with one mekugi-ana.
In roiro black lacquer saya; the handle with braided silk over shark skin; iron tsuba hand-guard with gold inlays depicting in relief work two Chinese men in mountains with a reclining ox; the fuchi-kashira and menuki sword fittings with gilt Paulownia mon on shakudo nanako.
Carved inscription: Made by Osafune Sukesada of Bizen Province on a day in the eighth month of the tenth year of Tenmon (=1541)
Sword length 84.1 cm; cutting edge 66.4 cm
Saya plain black lacquer, highly polished Tsuba (sword guard) – Two Chinese men in mountains with reclining ox Fuchi-kashira and menuki (decorative metal work on handle)– Pauwlonia flowers