京都所司代
In 1620, Shigemune was appointed to the position as the third "Kyoto Shoshidai"; and he would continue in this significant role for over 30 years (1620–1654). As "shoshidai," he was actively and personally engaged as the head of a network of spies tasked to discover and report any covert sources of sedition, insurrection or other kinds of unrest.