was a daimyō

Daimyo

is a generic term referring to the powerful territorial lords in pre-modern Japan who ruled most of the country from their vast, hereditary land holdings...

 in mid-Edo period

Edo period

The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

 Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

, who ruled Yokosuka Domain

Yokosuka Domain

' was a Japanese feudal domain of the Edo period, located in Tōtōmi Province. Yokosuka was a Fudai domain. It was centered at Yokosuka Castle in the Matsuo district of the city of Kakegawa in Shizuoka Prefecture.-History:...

 in Tōtōmi Province

Totomi Province

was a province of Japan in the area of Japan that is today western Shizuoka Prefecture. Tōtōmi bordered on Mikawa, Suruga and Shinano Provinces. Its abbreviated form name was .-History:...

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Tadamitsu was the 2nd son of Kyōgoku Takatoyo, daimyō of Marugame Domain in Sanuki Province

Sanuki Province

was an old province of Japan on the island of Shikoku, with the same boundaries as modern Kagawa Prefecture. It was sometimes called .It faced the Inland Sea and bordered on Awa and Iyo Provinces. Across Naruto strait it bordered Awaji Province too. Administratively it was included as a part of...

. As Nishio Tadanao

Nishio Tadanao

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.-Biography:Tadanao was the...

, had no heirs, he adopted his nephew in 1729. In 1731, Tadamitsu received the courtesy title of Mondo no Shō (主水正) along with junior 5th court rank, lower grade (ju go i no ge 従五位下). Tadamitsu became head of the Nishio clan

Nishio clan

The was a Japanese clan claiming descent from the Kira clan, a branch of the Seiwa Genji line. Kira Yoshitsugu, a son of Kira Mochihiro, served under Oda Nobunaga, Toyotomi Hideyoshi and Tokugawa Ieyasu adopted the family name of Nishio...

 in 1760, on Tadanao's death, and was appointed Sōshaban

Sōshaban

were officials of the Tokugawa shogunate in Edo period Japan. Conventional interpretations have construed this Japanese title as "master of ceremonies."...

(master of ceremonies) in the administration of the Tokugawa shogunate

Tokugawa shogunate

The Tokugawa shogunate, also known as the and the , was a feudal regime of Japan established by Tokugawa Ieyasu and ruled by the shoguns of the Tokugawa family. This period is known as the Edo period and gets its name from the capital city, Edo, which is now called Tokyo, after the name was...

. He retired in 1782, and was succeeded by his son Tadayuki

Nishio Tadayuki

was a daimyō in mid-Edo period Japan, who ruled Yokosuka Domain in Tōtōmi Province.Nishio Tadayuki was the second son of the third daimyō of Yokosuka Domain, Nishio Tadamitsu. As his elder brother Tadamasa died in October 1765, Tadayuki was chosen to succeed his father. In 1766 he received court...

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Tadamitsu died in Edo

Edo

, also romanized as Yedo or Yeddo, is the former name of the Japanese capital Tokyo, and was the seat of power for the Tokugawa shogunate which ruled Japan from 1603 to 1868...

 in 1789, at age 74. His grave is located at the Nishio clan temple of Ryumin-ji in modern Kakegawa, Shizuoka

Kakegawa, Shizuoka

is a city in western Shizuoka Prefecture, Japan. As of 2010, the city had an estimated population of 117,858 and a population density of 444 persons per km². The total area was 265.63 km².-Geography:...

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