Mark with Japanese mark: 七十一翁　豊川光長 "Nanajuuichi | #433359

七十一翁　豊川光長 "Nanajuuichi okina Toyokawa Mitsunaga". This mark comes from a "kozuka", the hilt of a secondary knife that is often paired with a Japanese sword, and was designed by Mitsunaga. Mitsunaga worked as a "soukenkinkou" in the Nara line of the Toyokawa house. Soukenkinkou is the Japanese name for metalworkers who design accessories for bladed weapons.