Mark with Japanese mark: 龍叟　法眼 "Ryusou Hougen" | #433117

龍叟　法眼 "Ryusou Hougen". This mark comes from a "kozuka", the hilt of a secondary knife that is often paired with a Japanese sword, and was designed by Seiju. Seiju worked as a "soukenkinkou" in the Nara line of the Kawano house. Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons.