According to their plan scheme, the Western squad including Mitsunari rose, but Ienaga was killed in the Battle of Fushimi-jo Castle, the preliminary skirmish of the Battle of Sekigahara, together with Mototada and Ietada.
目論見どおり、三成ら西軍は挙兵したが、家長は元忠、家忠らと共に関ヶ原の戦いの前哨戦である伏見城の戦いで戦死した。