According to "The Final report on the academic investigation of the corpses in Chuson-ji Temple," published by Chuson-ji Temple in July 1994, Hidehira's blood type was A and his height was 167 cm, the tallest of the three generations.
平成6年7月に中尊寺により上梓された『中尊寺御遺体学術調査　最終報告』によると、秀衡は血液型A型、身長は三代中もっとも高く167cm。