In 1603, when his younger paternal brother Tadatsugu IKEDA was assigned the lord of Okayama-jo Castle, he entered the castle as a vicarious administrator since Tadatsugu was still very young.
1603年（慶長8年）、異母弟の池田忠継が岡山城主に任じられたとき、幼年の忠継に代わって執政代行として岡山城に入った。