Oshima Domain

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Oshima Castle, seat of the domain

The Oshima Domain (大島藩 Ooshima han?) was a Nakaharan domain of the Shizuku period, with its holdings centered in modern-day Oshima, Oshima.

History

Oshima domain was part of the larger Kizugawa Domain in early Miyawaki Shogunate era. Later in 1615 after the Siege of Nagawa (1615), Miyawaki Motoyasu decide to split the southern part of domain into Oshima Domain. Yokozawa Sayaka retainer of Yokoyama Clan was the first Daimyo of Oshima until 1617 where she resigned and gave the seat to Yokozawa Motochika.

In 1757, Yokozawa Yukinaga, the leader of Oshima Domain deceased without any retainer. In exchange, Sasazaki Yoshinaka from inside the lead until his death in 1780 where the main branch of Yokozawa clan reinstated as the Daimyo of Oshima.

During the Nakahara Boshin War, Oshima sided with the Shogunate side where the Battle of Oshima-Ayukawa happened within its border with Ayukawa Domain. Later in 1868, Oshima Domain disbanded and formed into Oshima Prefecture

List of Daimyo

  • Yokozawa clan, 1615-1757 (250,000 koku)
  1. Yokozawa Sayaka (1615-1617)
  2. Yokozawa Motochika (1617-1675)
  3. Yokozawa Nobuka (1675-1692)
  4. Yokozawa Sadaharu (1692-1712)
  5. Yokozawa Haruyuki (1712-1749)
  6. Yokozawa Yukinaga (1749-1757)
  • Sasazaki clan, 1757-1780 (240,000 koku)
  1. Sasazaki Yoshinaka
  • Yokozawa clan, 1780-1864 (200,000 koku)
  1. Yokozawa Akemi (1780-1823)
  2. Yokozawa Haruki (1823-1857)
  3. Yokozawa Haruka (1857-1864)