Toyotomi Hidetsugu
When Toyotomi Hideyoshi came to power, Mogami submitted to his rule, as a result, he was given about 200,000 koku by Toyotomi Hideyoshi after the Siege of Odawara and participated in attacking Kunohe Rebellion. But later Yoshiaki became a supporter of Tokugawa Ieyasu following Hideyoshi's death. He was known to hate the Toyotomi because Hideyoshi ordered the execution of Yoshiaki's teenage daughter when purging his nephew Toyotomi Hidetsugu, to whom Yoshiaki's daughter was engaged. Hideyoshi refused to spare the life of Yoshiaki's 15-year-old daughter, who had only just arrived in Kyoto to become Hidestugu's concubine and had not yet even met her husband-to-be.