Amago clan
In 1554, Kunihisa was killed by Amago Haruhisa on the suspicion of treason on 25 November 1554 along with his eldest son Sanehisa and two grandsons, including a number of his retainers. His third son Takehisa would commit suicide the next day. The act was supposedly carried out after Mōri Motonari tricked Haruhisa into believing that Kunihisa intended to take over the Amago clan but one of the reasons may be that Kunihisa had been too arrogant towards the young Haruhisa.