Mark with Japanese mark: 勝　義胤 "Katsu Yoshitane" | #433529

勝　義胤 "Katsu Yoshitane". 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 Yoshitane, who worked as a "soukenkinkou" in the Nara line of the Honjo house. Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons.