小浜藩
was the 2nd "daimyō" of the Obama Domain. He was the fourth son of Sakai Tadakatsu, and was given the courtesy title of "Shuri-Daiyu" in 1644. He was proclaimed heir in 1649 when his elder brother, Sakai Tadatomo was disinherited for unknown reasons and exiled to a distant exclave of the domain in Awa Province. He became "daimyō" on his father's retirement in 1656. In 1668, he reorganized the domain's exclave in Awa Province to create the 10,000 "koku" Awa-Katsuyama Domain for his nephew, Sakai Tadakuni. During his tenure, he continued the policies of his father in organizing the domain government and codifying its law, flood control, and new rice land development, as well as encouraging education and literature. He died in Obama in 1682. His wife was a daughter of Matsudaura Sadayori of the Iyo-Matsuyama Domain.