Ōtaki Domain

Following the Battle of Odawara in 1590, the Kantō region was assigned to Tokugawa Ieyasu by the warlord Toyotomi Hideyoshi, who also restricted the Satomi to Awa Province for their lukewarm support of his campaigns against the Later Hōjō clan.

Tokugawa Ieyasu appointed Honda Tadakatsu, one of his Four Generals, to be daimyō of the newly formed 100,000 koku Ōtaki Domain.

The domain was briefly revived from 1623 to 1625 for Aoyama Tadatoshi, the tutor of the 3rd Tokugawa shōgun, Iemitsu, with its size further reduced to 20,000 koku.

The final daimyo of Ōtaki Domain, Ōkōchi Masatada, initially fought for the pro-Tokugawa forces at the Battle of Toba–Fushimi in the Boshin War, but later changed his allegiance to the new Meiji government.

He was appointed domain governor under the new administration, until the abolition of the han system in July 1871 and subsequently became a viscount under the kazoku peerage.