Mark with Japanese Mark: 洗心軒　北仙 "Senshinken | #458444

洗心軒　北仙 "Senshinken Hokusen". This mark is from a fuchi and was made by Hokusen, who worked as a sword engraver (soukenkinkou) in Hitachi Province (present-day Ibaraki Prefecture). Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons. A fuchi is a ferrule that is placed between the tsuba and a sword's hilt.