A Bizen katana Muromachi period (1333-1573), dated 1539 Sugata (configuration): honzukuri, iorimune, toriizori, chu-gissaki Kitae (forging pattern): itame in jinie Hamon (tempering pattern): suguha with nie and faint utsuri Boshi (tip): ko-maru Horimono (carving): gomabashi on the omote side and bohi on the ura side Nakago (tang): ubu with katte sagari file marks, two holes, signed Bizen no kuni no ju Osafune Kiyomitsu saku, and dated Tenbun hachinen nigatsu kichijitsu (An auspicious day in the second month of 1539) Habaki (collar): one-piece, gilt-copper Nagasa (length from tip to beginning of tang): 27 9/16in (70cm) Motohaba (width at start of tempered edge): 1 1/4in (3.2cm) Sakihaba (width before tip): 13/16in (2.1cm) In a shirasaya (wood storage scabbard) With Kantei certificate no. 16098 issued by the Nihon Token Hozon Kai (Japan Sword Preservation Society), dated September 3, 2006