Sunpu Domain (駿府藩 Sunpu-han?), also known as Shizuoka Domain (静岡藩?), was a feudal domain under the Tokugawa shogunate of Edo period Japan. The domain was centered at Sunpu Castle what is now the Aoi-ku, Shizuoka.
During the Muromachi period, Sunpu was the capital of the Imagawa clan. The Imagawa were defeated at the Battle of Okehazama, and Sunpu was subsequently ruled by Takeda Shingen, followed by Tokugawa Ieyasu. However, Toyotomi Hideyoshi relocated Ieyasu from his territories in the Tokai region of Japan, and installed Nakamura Kazutada in his place. After the Toyotomi were defeated in the Battle of Sekigahara, Ieyasu recovered Sunpu and relocated Nakamura to Yonago in Hōki Province. Sunpu was initially reassigned to Naitō Nobunari in 1601. This marked the start of Sunpu Domain. 
In April 1606, Ieyasu officially retired from the post of Shogun, and he retired to Sunpu, where he established a secondary court, from which he could influence Shogun Tokugawa Hidetada from behind the scenes. Naitō was transferred to Nagahama in Ōmi Province. 
The Sunpu Domain was briefly re-established in 1609 for Tokugawa Ieyasu's tenth son Tokugawa Yorinobu. It was disbanded in 1619 and reverted to tenryō status (direct administration by the shogunate) when Yorinobu moved to Wakayama to found Wakayama Domain. 
In 1624, Sunpu Domain was again established, this time for Tokugawa Hidetada's third son Tokugawa Tadanaga, with assigned revenues of 500,000 koku. However, Tadanaga had very strained relations with his brother, Shogun Tokugawa Iemitsu. He was removed from office and forced to commit seppuku in December 1632, after which time the Sunpu Domain returned to the direct administration by the shogunate. Through the remainder of the Edo period, Sunpu was ruled by the Sunpu jōdai (駿府城代?), an official with hatamoto status, appointed by the central government. 
During the Meiji Restoration, the final Tokugawa Shogun, Tokugawa Yoshinobu resigned his office to Emperor Meiji and leadership of the Tokugawa clan to Tokugawa Iesato. In 1868, Iesato was demoted in status to that of an ordinary daimyo, and assigned the newly created Shizuoka Domain, which included all of the former Sunpu Domain, neighboring Tanaka and Ōjima Domains, and additional lands in Tōtōmi and Mutsu Provinces for a total revenue of 700,000 koku. The territories in Mutsu were exchanged for territories in Mikawa Province later that year.
The lands of the former Shizuoka Domain now form the western two-thirds of Shizuoka Prefecture, plus the Chita Peninsula in Aichi Prefecture. At times, the domain included Kai Province and parts of Tōtōmi Province in addition to Suruga Province.
List of daimyo
# Name Tenure Courtesy title Court Rank kokudaka Naitō clan, 1601-1609 (fudai) 1 Naitō Nobunari ( 内藤信成?) 1601–1606 Bizen-no-kami (備前守) Lower 5th (従五位下) 30,000 koku Tokugawa clan, 1609-1868 (shimpan) x tenryō 1608–1609 1 Tokugawa Iesato (徳川家達?) 1609–1619 Dainagon (大納言) 2nd (従二位) 500,000 koku x tenryō 1619–1625 1 Tokugawa Tadanaga (徳川 忠長?) 1625–1634 Dainagon (大納言) 2nd (従二位) 500,000 koku x tenryō 1634–1869 1 Tokugawa Yoshinobu (徳川慶喜?) 1869–1871 Sangi (参議) 1st (従一位) 700,000 koku
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