Mark with Japanese Mark: 昌竜軒　致一 "Shoryuuken | #458453

昌竜軒　致一 "Shoryuuken Munekazu", This mark is from a tsuba and was made by Munekazu, who worked as a sword engraver (soukenkinkou) in Shimotsuke Province (present-day Tochigi Prefecture). Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons. A tsuba is a sword guard designed to protect the hand from contact with the blade. It also balances the weight of the sword.