I found the following fascinating and hope you also enjoy it. Having just bought a katana made by Omura Kaboku I thought it best to research him. The more I discovered the more I liked him...   Omura Kaboku. Born in Suruga Uegahara the 2nd son of  Mori Sukeemon officially he was Shintaro then Jirozaemon then Goroemon and finally Jibuzaemon. Early signatures include 義博Yoshihiro, 義秀Yoshihide and 康英Yasuhide. He studied medicine under Tsunoda Kyuho, and he seems to have started forging swords at a