Annaka Domain

Annaka Domain (安中藩, Annaka-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 Annaka Castle in what is now the city of Annaka, Gunma.

Ii Naomasa was one of Tokugawa Ieyasu’s most trusted Four Generals, and was made daimyō of Hikone Domain, with revenues of 180,000 koku. After his death in 1603, he was succeeded by his son, Ii Naotsugu, who was in poor health. Naotsugu sent his younger brother, Ii Naokatsu to the Siege of Osaka, where he served with great distinction. As a reward, Tokugawa Ieyasu gave Hikone to Naokatsu, and reassigned his elder brother to the much smaller holding (30,000 koku) of Annaka in 1615. This marked the start of Annaka Domain. After beginning work on Annaka Castle and the surrounding castle town, Naotsugu retired in favor of his son, Ii Naoyoshi, who was transferred to Nishio Domain in Mikawa Province in 1643.

The Ii clan was replaced by Mizuno Mototsugu from Shinjō Domain in Mikawa, and the domain was reduced to 20,000 koku. He turned the domain over to his son Mizonu Mototomo in 1663; however after Mototomo went insane and attempted to murder his wife in 1667, he was relieved of his post.

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