Mark with Japanese mark: 興二乗リ自ラ此ノ図ヲ作ル　江都藤原清壽 | #433105

興二乗リ自ラ此ノ図ヲ作ル　江都藤原清壽 "Kyou ni nori mizukara kono zuwo tsukuru Outo Fujiwara Seiju". 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.