Background
He was a son of Amago Tsunehisa. Under his father, he fought in campaigns in Aki and Bingo provinces during the 1520s and alongside Amago Haruhisa at the Siege of Koriyama Castle in 1540.
尼子 国久
He was a son of Amago Tsunehisa. Under his father, he fought in campaigns in Aki and Bingo provinces during the 1520s and alongside Amago Haruhisa at the Siege of Koriyama Castle in 1540.
He was known in his youth as Magoshirô. A principle Amako general under Tsunehisa, he led a force that came to be nicknamed the "Shingu army". Kunihisa"s faction was named Shingūtō (新宮党) after the town, Shingu, which was based in a valley north-east of Gassan-Toda where Kunihisa had established a mansion.
After Amago Masahisa was killed in 1518 Kunihisa acted as a guardian for the former"s son, Amako Haruhisa (Akihisa).
He had been called "On the military matters, he is like a kami and a oni" from his father, Tsunehisa. But he often looked down on those who did not do well on the battlefield and was obnoxious from time to time.
One possible reason for Haruhisa"s hostility towards Kunihisa and his Shingu faction is that they displayed increasing arrogance as their fame from their war service grew. 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.
Regardless of the motive for the act, the death of Kunihisa and the purge of his faction significantly damaged the Amago clan and arguably contributed towards the clan"s fall to their rival, the Mōri clan, in the 1570s.