He was born as a legitimate son and successor of Shinano Iida (later to become Tatsuno) Domain in Shinano Province and was granted an audience with the shogun Ietsuna TOKUGAWA in 1666.
信濃飯田藩（のち龍野藩）嫡子として生まれ、寛文6年（1666年）徳川家綱に拝謁。