Nakako's sister, KI no Yoshiko was Yoshimitsu ASHIKAGA's mother, Emperor Goenyu was Yoshimitsu's maternal cousin and they both were same age. (or one year difference according to the solar calendar)
仲子の姉妹の紀良子は足利義満の母で、後円融天皇と義満は母系で従兄弟に当たり、また同い年である（新暦では1つ違いになる）。