After
Tokugawa Ieyasu took control over the
Kantō region in 1590, he assigned one of his generals, Sugawara Sadatoshi, the 20,000
koku holding of Yoshii. Sadatoshi laid out the foundations of a town and market, and was succeeded by his adopted son,
Okudaira Tadamasa in 1602. Tadamasa’s mother was the eldest daughter of Tokugawa Ieyasu; he was transferred to
Kanō Domain in 1610. The domain then became vacant and was ruled as a
hatamoto holding until 1682. In 1682, Hotta Masayasu, a hatamoto bureaucrat in the Tokugawa shogunate, passed the 10,000
koku mark and was raised in status to daimyō. Yoshii Domain was revived to be his seat, but he was transferred to Omi-Miyagawa domain, where his descendants resided to the Meiji restoration, and Yoshii again reverted to
tenryō status. Likewise, in 1709, the
hatamoto Matsudaira Nobukiyo attained the 10,000
koku mark, and Yoshii Domain was revived as his seat. Nobukiyo was the grandson of the
kuge Takatsukasa Nobuhira, whose sister married Shōgun
Tokugawa Iemitsu. He traveled to Edo with only one retainer, but was awarded estates and servants and eventually married a daughter of
Tokugawa Yorinobu and adopted the Matsudaira name. The descendants of Matsudaira Nobukiyo continued to rule Yoshii until the end of the Edo period. During the
Bakumatsu period, the final daimyō, Matsudaira Nobunori, changed his name to Yoshii Nobunori, and joined the new Meiji government in February 1868. With the
abolition of the han system in July 1871, Yoshii Domain became part of “Iwahana Prefecture”, which later became part of Gunma Prefecture. ==Holdings at the end of the Edo period==