Born in 1677 as the fourth son of the hatamoto Ooka Tadataka. In 1712, he was appointed magistrate of Ise-Yamada, and in 1717, at the unusually young age of 40, he became Edo's South Town Magistrate. Trusted by the 8th shogun Yoshimune, he supported the Kyoho Reforms and served as town magistrate for about 20 years. He implemented numerous policies: installing suggestion boxes to hear commoners' voices, establishing the Koishikawa Medical Facility for the poor, organizing firefighting systems, and stabilizing prices. He was promoted to Temples and Shrines Magistrate in 1736 and ultimately became a daimyo of 10,000 koku at Nishi-Ohira in Mikawa—an extremely rare rise from town magistrate to daimyo. He died in 1751 at age 75.