Okayama Domain

The Okayama Domain (岡山藩, Okayama han) was a Japanese domain of the Edo period. It was associated with Bizen Province in modern-day Okayama Prefecture.^[1]

In the han system, Okayama was a political and economic abstraction based on periodic cadastral surveys and projected agricultural yields.^[2] In other words, the domain was defined in terms of kokudaka, not land area.^[3] This was different from the feudalism of the West.

History

The domain sided with the Kyoto government during the Boshin War.^{[citation needed]}

List of daimyo

The hereditary daimyo were head of the clan and head of the domain.

Kobayakawa clan, 1600-1602 (tozama; 510,000 koku)^[1]

Hideaki

Ikeda clan, 1603-1632 (tozama/jun-shinpan; 280,000->380,000->315,000 koku)^[4]

Ikeda clan, 1632-1871 (tozama; 315,000 koku)^[1]

Genealogy (simplified; Ikeda clan - Okayama)

Ikeda Tsuneoki (1536-1584)
- Terumasa, 1st Lord of Himeji (1565-1613)
  - Toshitaka, 2nd Lord of Himeji (1584-1616)
    - I. Mitsumasa, 1st Lord of Okayama (2nd creation. cr. 1632) (1609-1682; r. 1632-1672)
      - II. Tsunamasa, 2nd Lord of Okayama (2nd creation) (1638-1714; r. 1672-1714)
        III. Tsugumasa, 3rd Lord of Okayama (2nd creation) (1702-1776; r. 1714-1752)
        IV. Munemasa, 4th Lord of Okayama (2nd creation) (1727-1764; r. 1752-1764)
        V. Harumasa, 5th Lord of Okayama (2nd creation) (1750-1819; r. 1764-1794)
        VI. Narimasa, 6th Lord of Okayama (2nd creation) (1773-1833; r. 1794-1829)
        
        Sagara Nagahiro, 12th Lord of Hitoyoshi (1752-1813)
        Sagara Yorinori, 13th Lord of Hitoyoshi (1774-1856)
        Sagara Yoriyuki, 14th Lord of Hitoyoshi (1798-1850)
        X. Akimasa, 10th Lord of Okayama (2nd creation) 1st Marquess (1836-1903; r. 1868-1869, Governor of Okayama: 1869-1871, Marquess: 1884)
        Narimasa, 13th family head and 2nd Marquess (1865-1909; 11th family head and 2nd Marquess: 1903-1909)
        Tadamasa, 14th family head and 3rd Marquess (1895-1920; 12th family head and 3rd Marquess: 1909-1920).
        
        Nobumasa, 15th family head and 4th Marquess (1904-1988; 13th family head and 4th Marquess: 1920-1947, 13th family head: 1947-1988)
        Takamasa, 16th family head (1926-2012; 14th family head: 1988-2012). m. Princess Atsuko of the Imperial House of Japan (b. 1931). No issue; the family became extinct after his death.
  - I. Tadatsugu, 1st Lord of Okayama (1st creation. cr. 1603) (1599-1615; r. 1603-1615)
  - II. Tadakatsu, 2nd Lord of Okayama (1st creation) (1602-1632; r. 1615-1632)
    - III. Mitsunaka, 3rd Lord of Okayama (1st creation), 1st Lord of Tottori (3rd creation) (1630-1693; r. 1632)
      - Nakazumi, 1st Lord of Tottori-Shinden (1650-1722)
        Yoshiyasu, 3rd Lord of Tottori (3rd creation) (1687-1739)
        Muneyasu, 4th Lord of Tottori (3rd creation) (1717-1747)
        Shigenobu, 5th Lord of Tottori (3rd creation) (1746-1783)
        Harumichi, 6th Lord of Tottori (3rd creation) (1768-1798)
        Iyohime Chikako (1792-1824) m. Shimazu Narioki, 10th Lord of Satsuma (1791-1859)
        VII. Naritoshi, 7th Lord of Okayama (2nd creation) (1811-1842; r. 1829-1842)
- Motosuke (1559-1584)
  - Yoshiyuki (1577-1618)
    - Yoshinari (1605-1676)
      - Yoshitaka (1641-1696)
        Yoshimichi (1681-1743)
        Masamichi, 3rd Lord of Kamogata (1714-1792)
        Masanao, 5th Lord of Kamogata (1746-1818)
        Masami, 6th Lord of Kamogata (1772-1819)
        Masayoshi, 8th Lord of Kamogata (1811-1847)
        Utako (1830-1877) m. VIII. Yoshimasa, 8th Lord of Okayama (2nd creation) (1823-1893; r. 1842-1863. Son of the 5th Lord of Nakatsu.)
        Hisako (1848-1868) m. IX. Mochimasa, 9th Lord of Okayama (2nd creation) (1839-1899; r. 1863-1868. Son of Tokugawa Nariaki, Lord of Mito.)