Before the war, Tosa was under the rule of the Chosokabe clan, but the clan was unfortunately subjected to the confiscation of its land as the result of the war, and Tosa had to accept a new daimyo, Kazutoyo YAMAUCHI.
戦前、土佐は長宗我部氏の支配にあったが、結果領地没収の憂き目にあい、土佐には新しい城主・山内一豊を迎えることになった。