Mark with Japanese mark: 孔齋良延 "Kousai Yoshinobu" | #433155

孔齋良延 "Kousai Yoshinobu". 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 Yoshinobu, 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.