Tosa

Tosa district lies among the hills and valleys of central Tosa Province, north of the Pacific coast. During the sixteenth century, the Motoyama family held lands here and in neighbouring districts, maintaining a network of castles across the country. Their rivals, the Chōsokabe of Nagaoka, contested control of the central plain. The Motoyama withdrew from Asakura Castle under pressure, and the Chōsokabe eventually brought the region under their rule.