Sakai Tadamochi

was the 7th daimyō of Obama Domain.

Biography Tadamochi was the fifth son of Sakai Tadaoto by a concubine, and became daimyō in 1740 on the death of his elder brother Sakai Tadaakira. His courtesy title was Shuri-daiyu. His wife was a daughter of Matsudaira Sadanori of Takada Domain.

In 1741 Tadamochi was appointed a sōshaban and jisha-bugyō simultaneously, and later the same year, he became Osaka-jō dai. In 1747 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. From 1752 to 1756 he was appointed the 21st Kyoto Shoshidai,

He retired from public office in 1757, and his title was changed to Sakyō-daifu. He died in 1775 without male heir

Tadamochi is buried with others of his clan at Kuin-ji in Obama in what is today Fukui Prefecture.