Hishikari
Hishikari belonged to the contested country around the upper Sendai River in southern Kyushu. During the sixteenth century the Hishikari family and their Sagara allies resisted the expanding Shimazu. Ōkuchi Castle was an important stronghold in their struggle, and control of the surrounding district changed with the fortunes of these competing houses.
In 1569 the Hishikari and Sagara made peace and submitted to the Shimazu. Niiro Tadamoto was appointed to govern Ushikuso-in that year, establishing Shimazu authority in the neighbouring Ōkuchi district. These events formed part of the broader campaigns through which the Shimazu extended their power across Satsuma, Ōsumi and Hyūga. Hishikari's early modern setting emerged from this transition from competing local lordships to the territorial government of the Shimazu.