In the han system, Numazu was a political and economic abstraction based on periodic cadastral surveys and projected agricultural yields. In other words, the domain was defined in terms of kokudaka, not land area. This was different from the feudalism of the West.
In 1601, Ōkubo Tadasuke, a 5000 koku hatamoto was rewarded by Shōgun Tokugawa Ieyasu for his efforts at the Battle of Sekigahara, where he stopped an advance by Toyotomi forces under the famed Sanada Yukimura, by elevation to the rank of daimyō. He was assigned the territory of Numazu, to the east of Sunpu, to be his domain, with revenues of 40,000 koku. However, when he died without heirs in 1617, the domain reverted to the Tokugawa Shogunate.
The domain was revived in April 1777, when the former wakadoshiyori Mizuno Tadatomo was transferred from Ohama Domain in Mikawa province, and assigned revenues of 20,000 koku. He rebuilt Numazu Castle in 1780, and his revenues were increased by 5,000 koku in 1781 when he assumed the post of rōjū . He received another 5,000 koku increase in 1785.
The second daimyō of Numazu, Mizuno Tadaakira, was also a rōjū, and a close confidant of Tanuma Okitsugu, a senior official in the Tokugawa Shogunate. Through this connection, he secured an increase in the revenues of Numazu Domain by an additional 10,000 koku in 1821 and another 10,000 koku in 1829.
However, during the Bakumatsu period, the 8th (and final) daimyō, Mizuno Tadanori, sided with the new Meiji government in the Boshin War of the Meiji Restoration. His domain was abolished with the creation of Shizuoka Domain for the retired ex-Shōgun Tokugawa Yoshinobu, and Nobutoshi was transferred to the short-lived Kikuma Domain in Kazusa province in July 1868.
List of daimyo
The hereditary daimyo were head of the clan and head of the domain.
# Name Tenure Courtesy title Court Rank revenues 1 Mizuno Tadatomo (水野忠友?) 1777–1802 Dewa-no-kami Lower 4th (従四位下) 20,000→30,000 koku 2 Mizuno Tadaakira (水野忠成?) 1802–1834 Dewa-no-kami Lower 4th (従四位下) 30,000→50,000 koku 3 Mizuno Tadayoshi (水野忠義?) 1834–1842 Dewa-no-kami Lower 4th (従四位下) 50,000 koku 4 Mizuno Tadatake (水野忠武?) 1842–1844 Dewa-no-kami Lower 5th (従五位下) 50,000 koku 5 Mizuno Tadayoshi (水野忠良?) 1844–1858 Dewa-no-kami Lower 5th (従五位下) 50,000 koku 6 Mizuno Tadahiro (水野忠寛?) 1858–1862 Dewa-no-kami Lower 4th (従四位下) 50,000 koku 7 Mizuno Tadanobu (水野忠誠?) 1862–1866 Dewa-no-kami Lower 4th (従四位下) 50,000 koku 8 Mizuno Tadanobu (水野忠敬?) 1866–1868 Dewa-no-kami 3rd (従三位) 50,000 koku
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