Mark with Japanese Mark: 生涼軒　勝平 "Seiryouken | #458361

生涼軒　勝平 "Seiryouken Katsuhira". This mark is from a menuki, which are small decorative pieces placed under the binding of a sword. They serve several purposes, such as improving grip or providing good luck. This menuki was made by Katsuhira, who worked as a sword engraver (soukenkinkou) in Hitachi Province (present-day Ibaraki Prefecture). Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons.