Jōzai Domain

Relatively small in size, it played an important role at the end of its existence, during the Boshin War of the Meiji Restoration.

Shōgun Tokugawa Ienari's attendant (osobashu) Hayashi Tadafusa was promoted from hatamoto to wakadoshiyori, or junior councilor in April 1825.

On June 4, 1853, coastal defenses at Kaibuchi, which lay on Edo Bay, were strengthened, and were kept at that level of preparation until March 23, 1854.

With Tadakata's death, the domain headship passed into the hands of his brother and adopted heir, Hayashi Masanosuke, or as he is more often known, Tadataka (忠崇)[1]: 527 With the start of the Boshin War, Hayashi Tadataka was at Jōzai, and though he was not able to participate in the Battle of Toba–Fushimi, he set himself apart from all other fudai lords in that he invoked his hereditary obligation to the Tokugawa clan in going to war.

Taking part in the guerrilla warfare efforts of Hitomi Katsutarō, Tadataka departed his domain with his entire retainer force, and fought from Izu Province all the way north to Aizu and Sendai as part of the Ōuetsu Reppan Dōmei, finally surrendering when he received news that the main Tokugawa family had been given a fief at Sunpu (modern-day Shizuoka), in Suruga Province.