Mark with Japanese Mark: 水戸住　一柳友善 "Mito ju | #458275

水戸住　一柳友善 "Mito ju Hitotsuyanagi Tomoyoshi". This mark is from a kozuka, which is the hilt of a small, secondary knife. It was made by Tomoyoshi, 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.