Yoshii Domain

Yoshii Domain (吉井藩, Yoshii-han^?) was a feudal domain under the Tokugawa shogunate of Edo period Japan, located in Kōzuke Province (modern-day Gunma Prefecture), Japan. It was centered on Yoshii jin'ya in what is now part of the city of Takasaki, Gunma. Yoshii was ruled through much of its history by a branch of the Takatsukasa clan, which had adopted the patronym of Matsudaira.

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 daimyo. Yoshii Domain was revived to be his seat, but he was transferred to Omi-Miyagawa domain, where his descendents 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 Shogun 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 descendents of Matsudaira Nobukiyo continued to rule Yoshii until the end of the Edo period.

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