Mark with Japanese Mark: 詰然居光中 "Kitsuzenkyo | #458118

詰然居光中 "Kitsuzenkyo Mitsunaka". This mark is from a fuchi and was made by Mitsunaka, who worked as a sword engraver (soukenkinkou) in Dewa Province (present-day Fukushima Prefecture). Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons. A fuchi is a ferrule that is placed between the tsuba and a sword's hilt.