the Kantō Region for some time, as well as in Edo itself, passing away in 1678. Two of his most prominent students and successors were Nagasone Okinao and Nagasone Okihisa. Popular uses "Kotetsu" is used as a name for swords in various anime, manga, and video game series, such as Vagabond, Rurouni Kenshin, One Piece and Black Cat. The Kōtetsu (formerly the Confederate warship CSS Stonewall) was a Japanese navy ironclad in the Boshin War. Kotetsu II Nagasone Okimasa, the adopted or biological son of Nagasone Okisato, is often called Kotetsu II. He is also rated as the Saijo Ō Wazamono. References Bibliography Yasu Kizu, Swordsmith Nagasone Kotetsu Okisato, Hollywood: W.M. Hawley Publications, 1990. 1590s births 1678 deaths Japanese swordsmiths Japanese Buddhist clergy