Because the eldest son Yasumichi SHINDO succeeded Nagamasa as the head of the family, Nagayuki became the adopted son of his relative Nagafusa SHINDO, who was a vassal of the Konoe family.
長昌の跡は長男の進藤泰通が継いだため、長之は親戚で近衛家家臣の進藤長房の養子に入った。