Mark with Japanese mark: 江府住　辰直 "Koufu ju | #433471

江府住　辰直 "Koufu ju Tatsunao". This mark comes from a "tsuba", a sword guard designed to protect the hand from contact with the blade and an opposing sword. It was made by Tatsunao, who worked as a "soukenkinkou" in the Nara line of the Ido house. Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons.