A finely mounted tanto
The koto blade by Yasumitsu of Osafune, Bizen province, dated 1415
The blade of hira-zukuri form, with sugu-ba of nioi, itame-hada, with marudome-hi and bonji to either side, the ubu-nakago with one mekugi-ana, signed and dated Bishu Osafune Yasumitsu, Oei nijuninen, hachigatsu (Eighth month 1415); koshira-e: the saya of black lacquer, with a design of fish swimming in turbulent water, in gold and silver togidashi maki-e; the fittings mainly of silver, carved and inlaid with fish in water, details in gold, copper and shakudo takazogan; the kozuka similarly decorated with the sun rising behind breaking waves, the menuki of striped fish in silver and shibuichi and the habaki of silver and shibuichi, carved and engraved with gulls flying over waves, the tsuba signed Masaaki and the fuchi signed Ishiguro Masaaki. The blade 28.5cm (11¼in) long.