Mark with Japanese mark: 孔叟壽良造 "Kousou Hisayoshi | #433148

孔叟壽良造 "Kousou Hisayoshi tsukuru". This mark comes from a "kozuka", the hilt of a secondary knife that is often paired with a Japanese sword, and was designed by Hisayoshi. Hisayoshi 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.