The was a Japanese clan which claimed descent from the Seiwa Genji

Seiwa Genji

The ' were the most successful and powerful of the many branch families of the Japanese Minamoto clan. Many of the most famous Minamoto warriors, including Minamoto Yoshiie, also known as "Hachimantaro", or God of War, and Minamoto no Yoritomo, the founder of the Kamakura shogunate, were descended...

 branch of the Minamoto clan

Minamoto clan

was one of the surnames bestowed by the Emperors of Japan upon members of the imperial family who were demoted into the ranks of the nobility. The practice was most prevalent during the Heian Period , although its last occurrence was during the Sengoku Era. The Taira were another such offshoot of...

. In the 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....

, the Mizuno clan produced many men who were fudai

Fudai

was a class of daimyo who were hereditary vassals of the Tokugawa in Edo period Japan. It was primarily the fudai who filled the ranks of the Tokugawa administration.-Origins:...

 daimyo serving the Tokugawa shogun, as well as countless families of hatamoto

Hatamoto

A was a samurai in the direct service of the Tokugawa shogunate of feudal Japan. While all three of the shogunates in Japanese history had official retainers, in the two preceding ones, they were referred to as gokenin. However, in the Edo period, hatamoto were the upper vassals of the Tokugawa...

. Lady Odai, Tokugawa Ieyasu

Tokugawa Ieyasu

 was the founder and first shogun of the Tokugawa shogunate of Japan , which ruled from the Battle of Sekigahara  in 1600 until the Meiji Restoration in 1868. Ieyasu seized power in 1600, received appointment as shogun in 1603, abdicated from office in 1605, but...

's mother, was the daughter of a Mizuno; specifically, Mizuno Tadamasa

Mizuno Tadamasa

' was a samurai lord of feudal Japan. He ruled Kariya Castle. He was also the father of Dai-no-kata, the mother of shogun Tokugawa Ieyasu....

 of Kariya Castle.

The late Edo-era political reformer Mizuno Tadakuni

Mizuno Tadakuni

was a daimyō during late-Edo period Japan, who later served as chief senior councilor in service to the Tokugawa Shogunate. He is remembered for having instituted the Tenpo Reform.-Biography:...

 was a descendant of this clan.

The clan ruled over the short-live Ogawa Domain

Ogawa Domain

The was a feudal domain in Owari Province, Japan. Historically, "Ogawa" has also been written as 小川 and 小河. The area was controlled by Ogawa Castle.-History:...

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