Nishio Tadanao

Nishio Tadanao 西尾忠尚
Born	1689 Edo, Japan
Died	April 25, 1760 Edo, Japan
Nationality	Japanese
Other names	Oki no Kami
Occupation	daimyō
Spouse(s)	daughter of Kyōgoku Takatoyo

Nishio Tadanao (西尾 忠尚^?, 1689 – April 25, 1760) was a daimyō in mid-Edo period Japan, who ruled Yokosuka Domain in Tōtōmi Province. He also served as an official within the administration of Tokugawa Shogunate, rising through the ranks first as Sōshaban, Jisha-bugyō, Wakadoshiyori, and finally to the position of Rōjū.

Tadanao was the fourth son of Nishio Tadanari, the first daimyō of the Nishio clan at Yokosuka Domain. He was recognized as heir apparent in 1696 and granted courtesy rank and title of junior 5th court rank, lower grade (ju go i no ge 従五位下), and Harima no Kami in 1703. He became clan leader upon his father's retirement in 1713. In the same year, he received his father's former courtesy title, Oki no Kami.

Tadanao entered the service of the Tokugawa administration in the spring of 1732, with his appointment to the offices of Sōshaban and Jisha-bugyō. After two years in these positions, he was promoted to wakadoshiyori. In 1745, his court rank was raised to junior 4th, lower grade (ju shi i no ge 従四位下), and his domain increased by 5,000 koku to 30,000 koku. The following summer, he was made a rōjū in the service of Shogun Tokugawa Ieshige, and served in the position until 1747. His domains were further expanded by another 5,000 koku in 1749, bringing Yokosuka Domain to 35,000 koku in size.

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