Muramasa, commonly known as Sengo Muramasa, was a famous swordsmith who founded the Muramasa school and lived during the Muromachi period in Kuwana, Ise Province, Japan.
Nabeshima Katsushige
Replica of the Tonbokiri, made in 1847, in the Tokyo National Museum
A Tale of Sano Jirōzaemon, Tsukioka Yoshitoshi, 1886. People rumored that Jirōzaemon murdered his lover with a cursed sword. The kabuki drama Kago-tsurube Sato-no-Eizame (1888) claimed that his sword was forged by Muramasa.