Iwatsuki Domain

However, following the destruction of that clan at the Battle of Odawara of 1590, the territory came under the control of Tokugawa Ieyasu, who assigned a 20,000 koku domain to one of his most trusted retainers, Kōriki Kiyonaga.

Following the Siege of Osaka, his grandson Kōriki Tadafusa was awarded with a promotion to the 35,000 koku Hamamatsu Domain in 1619.

The following year, in 1620, the rōjū Aoyama Tadatoshi was awarded Iwatsuki with holdings of 55,000 koku.

The Abe clan ruled Iwatsuki over the next five generations until 1681, gradually increasing their holdings to 95,000 koku.

The final daimyō of Iwatsuki, Ōoka Tadatsura (1847–1920) sided with the pro-imperial forces in the Boshin War and made a viscount (shishaku) in the kazoku peerage system in the Meiji period.