Mark with Japanese mark: 藤原清壽 "Fujiwara Seiju" | #433103

藤原清壽 "Fujiwara Seiju". 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 Seiju, who 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.