Mark with Japanese Mark: 一乗斎　弘寿 "Ichijousai | #458322

一乗斎　弘寿 "Ichijousai Hirotoshi". This mark is from a fuchi and was made by Hirotoshi, 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.