Mark with Japanese mark: 水戸住　久則 "Mito ju | #433243

Mark with Japanese mark: 水戸住　久則 "Mito ju | #433243
水戸住　久則 "Mito ju Hisanori". This is the mark of Hisanori, who worked as a "soukenkinkou" in the Nara line of the Chizuka house. Soukenkinkou is the Japanese name for the makers of the accessories for bladed weapons.