Yoshimitsu allowed the constables, who had had limited powers during the Kamakura period, to become strong regional rulers, later called "daimyōs". In time, a balance of power evolved between the "shōgun" and the "daimyōs"; the three most prominent "daimyō" families rotated as deputies to the "shōgun" at Kyoto. Yoshimitsu was finally successful in reunifying the Northern and Southern courts in 1392, but, despite his promise of greater balance between the imperial lines, the Northern Court maintained control over the throne thereafter. The line of shoguns gradually weakened after Yoshimitsu and increasingly lost power to the "daimyōs" and other regional strongmen. The "shōgun"s influence on imperial succession waned, and the "daimyōs" could back their own candidates.