After the Battle of Sekigahara, a scheme of Masamune was exposed that he secretly ordered Munenao SHROISHI to support Tadachika WAGA for instigating ikki (uprising of peasant) in the territory of Nanbu clan (The uprising troops were defeated in April, 1601).
戦後、政宗が密かに白石宗直に支援させて、南部氏領国で和賀忠親に一揆を煽動させていた策略が発覚した（一揆軍は翌慶長6年4月に敗北）。