Fushimi Castle
After Ieyasu's move to the Kantō region in 1590, Ienaga was granted the 20,000 koku fief of Sanuki in Kazusa Province. In 1600, he was assigned to Fushimi Castle together with Torii Mototada and Matsudaira Ietada. He is believed to have been one of the last of the castle's defenders to be killed, during the assault on the castle by the forces of Ishida Mitsunari.