KOTETSU

Nagasone Kotetsu (長曾禰虎徹; c. 1597 – June 24, 1678) (born Nagasone Okisato) was a Japanese swordmaker of the early Edo period. His father was an armorer who served Ishida Mitsunari, the lord of Sawayama. However, as Ishida was defeated by Tokugawa Ieyasu at the Battle of Sekigahara, the Nagasone family and some other craftsmen from Sawayama went to Echizen Province, where they took refuge in Fukui City.