Toyotomi victory The Kunohe rebellion (九戸政実の乱, Kunoe Masazane no Ran) was an insurrection of the Sengoku period of Japan that occurred in Mutsu Province from 13 March to 4 September 1591.

In response, Hideyoshi sent a punitive expedition with an army 30,000 strong led by Ieyasu Tokugawa, Toyotomi Hidetsugu, Date Masamune, Ishida Mitsunari, Ōtani Yoshitsugu, Gamō Ujisato, Uesugi Kagekatsu, Satake Yoshishige, and Maeda Toshiie, in order to pacify the rebellion.

Thus causing the punitive expedition army to take measure by this development by splitting their forces as Ieyasu, Naomasa, Ujisato, and some commanders were now changing their focus to suppress Masazane's rebellion first.

On 4 September, Masazane’s brother, Kunohe Sanechika (who was with the attacking forces) entered the castle and led out several Nanbu clan members who were willing to surrender, and who had donned white robes and had shaved their heads as a sign of humility.

[7] The rebellions finally being suppressed June 20 with Waga Yoshitada being slain in battle,[8] while Hienuki Hirotada sentenced to "Kaieki law" which stated that he and his clan's status and rights as samurai being stripped.