京都所司代
was the 12th and the 14th "daimyō" of the Obama Domain. He was the fifth son of Sakai Tadayuki, and became "daimyō" in 1834 when Sakai Tadayori retired. His wife was a daughter of Matsudaiara Terunobu of the Takasaki Domain. In 1840, he was given the courtesy title of "Wakasa-no-kami" and Lower 4th, Junior grade court rank. In 1842, was appointed simultaneously as a "sōshaban" and "jisha-bugyō". The following year he was appointed "Kyoto Shoshidai" and he added the title of "Jijū" to his honorific. He resigned as "Kyoto Shoshidai" in 1850 but was reappointed in 1858, and many of the events which occurred in Kyoto during the tumultuous Bakumatsu period occurred while he was at Kyoto. He resigned as "Kyoto Shoshidai" and "daimyō" in 1862 and went into retirement, changing his name to Tadatoshi (忠禄). He re-assumed his position as "daimyō" at the start of the Boshin War (following the defeat of the Tokugawa shogunate forces at the Battle of Toba-Fushimi) and defected to the Imperial side. In 1869, he was appointed imperial governor of Wakasa under the new Meiji government. He died in 1873.