Ōsaki

The Ōsaki were a branch of the Shiba family, whose ancestor Shiba Iekane went north during Japan's fourteenth-century wars between the Northern and Southern Courts.

Iekane was an Ashikaga commander, and his descendants ruled Ōsaki in Mutsu. Around 1567 Ōsaki Yoshitaka became family head and fought the Kasai. In 1590 Toyotomi Hideyoshi deprived him of his lands during the settlement of northern Japan.