Mark with Japanese mark: 丁亥仲夏澹窓芳継鐫 "Hinotou chuka | #433315

丁亥仲夏澹窓芳継鐫 "Hinotou chuka Tanso Yoshitsugu horu". This mark comes from a "kogai", which are miscellaneous small tools such as hairpins. It was designed by Yoshitsugu, who worked as a "soukenkinkou" in the Nara line of the Sonobe house. Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons.