blade, hada and hamon are authentic. This odachi has a bo-hi (fuller or "blood groove"). Norimitsu was a famous line of swordsmiths that began in the Oei Bizen school (1394) and continued until the end of Bizen. Around 2000, it was polished and named "Kibitsu maru" by the priest of Kibitsu Shrine in Okayama Prefecture. Specifications These are the specifications of the Ōdachi Norimitsu. Total length: Nagasa (cutting edge): Sori (curvature): Nakago (tang): Blade thickness (maximum): Habaki (collar to hold blade in scabbard): Weight: Mei (blade signature, 銘): Bishu Osafune Norimitsu (備州) Location: Kibitsu Shrine, Okayama. Production date: August 1446 (Muromachi period) Sugata (blade shape): Shinogi-zukuri, maru-mune, bo-hi with maru-dome Hada (grain pattern, 肌): Itame Hamon (temper pattern): Ko-gunome, choji with tobiyaki and kinsuji. Haja-no-Ontachi The longest known ōdachi is the Haja-no-Ontachi (Great Evil-Crushing Blade). Its length is with an overall weight of . In 1859, this ōdachi was donated to the Hanaoka Hachiman Shrine in Yamaguchi during an imperial memorial ceremony by parishioners who sympathized with imperial patriots. It is kept in the Treasure House which is not open to the public. See also Changdao Great sword Miaodao Nagamaki Zhanmadao Zweihänder General and cited references Nick Evangelista: The Encyclopedia of the Sword. Greenwood Publishing Group, 1995, p. 419, . Stephen Turnbull: The Samurai Swordsman: Master of War. Publisher: Tuttle Publishing, 2008, . Citations External links Richard Stein's Japanese sword guide Ōdachi Tanto Blade Benefits Pictures of some blades Japanese sword types Japanese swords Samurai swords