| Iwao's family crest was 'corner-standing four black squares with one small white circle in the center of each square entirely encircled by a black circle,' typical for the Oyama clan of the Sasaki-Genji (Minamoto clan). |
家紋は佐々木源氏大山氏といて典型的な「丸に隅立て四つ目」であった。 |