Mark with Japanese mark: 佐州住　利姓 "Sashu ju | #433490

Mark with Japanese mark: 佐州住　利姓 "Sashu ju | #433490
佐州住　利姓 "Sashu ju Toshiuji". This mark comes from a "fuchi", a sword ferrule in the shape of a cap or ring, and was made by Toshiuji. Toshiuji worked as a "soukenkinkou" in the Nara line of the Sawatari house. Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons.