小浜藩
was the 5th "daimyō" of the Obama Domain. He was the younger son of Sakai Tadashige of Tsuruga Domain, and was adopted as heir by Sakai Tadasono on his deathbed in 1706. He was received in formal audience by Shōgun Tokugawa Tsunayoshi, and was confirmed as "daimyō", receiving the courtesy title of "Shuri-daifu" the same year. From 1718 to 1722 he was appointed simultaneously as a "sōshaban" and "jisha-bugyō". In 1723, he became "Osaka jōdai" and his courtesy title was changed to "Sanuki-no-kami" and his court rank was increased from Lower 5th, Junior grade to Lower 4th, Junior grade. He was promoted to "rōjū" in 1728 and gained the additional courtesy title of "Jijū". On July 7, 1735 he suddenly fell ill and died while in office the following day. His wife was a daughter of Arima Yorimoto of the Kurume Domain.