Mark with Japanese Mark: 珍久彫之 "Yoshihisa korewo | #458093

珍久彫之 "Yoshihisa korewo horu". This mark is from a tsuba and was made by Yoshihisa, who worked as a sword engraver (soukenkinkou) in Dewa Province (present-day Yamagata 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.