Mark with Japanese Mark: 東園主人光親 "Touen shujin | #458114

東園主人光親 "Touen shujin Mitsuchika". This mark is from a kozuka, which is the hilt of a small, secondary knife. It was made by Mitsuchika, who worked as a sword engraver (soukenkinkou) in Dewa Province (present-day Yamagata Prefecture). Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons.