When his legitimate son Akizumi IWAMATSU opposed it and rose in revolt against him, Iezumi disinherited his son and appointed his grandson Hisazumi IWAMATSU (Akizumi's son) to his successor.
これに反発する嫡男・岩松明純が叛旗を翻すと、家純はこれを廃嫡して孫の岩松尚純（明純の子）を後継者としている。