Tosa Jinshotai (迅衝隊) soldiers with Shaguma headress in the Battle of Ueno, Boshin War (1867–68)
Jinshotai(迅衝隊)(From the left in the bottom row: Ban Gondayu, Itagaki Taisuke, Tani Otoi(young boy), Yamaji Motoharu. From the left in the middle row: Tani Shigeki(Sinbei), Tani Tateki(Moribe), Yamada Kiyokado(Heizaemon), Yoshimoto Sukekatsu(Heinosuke). From the left in the top row: Kataoka Masumitsu(Kenkichi), Manabe Masayoshi(Kaisaku), Nishiyama Sakae, Kitamura Shigeyori(Chobei), Beppu Hikokuro.)

The Tosa Domain (土佐藩, Tosa han) was a feudal domain in Tosa Province of Japan (present-day Kōchi Prefecture) during the Edo period. Some from the domain played important roles in events in the late Tokugawa shogunate. Among them are Nakahama Manjirō, Sakamoto Ryōma, Yui Mitsue, Gotō Shōjirō, Itagaki Taisuke, Nakae Chōmin, and Takechi Hanpeita.

In the early Meiji urban prefectures/domains/rural prefectures threefold system of government, its official name was "Kōchi Domain" (高知藩, Kōchi han). With the ultimate replacement of all domains with prefectures in 1871, Kōchi domain became Kōchi prefecture.

Ashikaga and Azuchi–Momoyama periodsEdit

Around 1400 Tosa was controlled by Hosokawa clan, associates of the Ashikaga shōguns.

In 16th century Tosa was a base of the Chōsokabe clan, that under Chōsokabe Motochika briefly (1583–1585) controlled the entire island of Shikoku. Defeated by Toyotomi Hideyoshi in 1585, Chōsokabe fought for him in Kyushu and Korea. The next daimyō Chōsokabe Morichika joined the western host at Sekigahara. He was removed from the province by a victorious Tokugawa Ieyasu, who granted the domain to Yamauchi Kazutoyo in 1600.[1]

The Chōsokabe clan retainers were mutinous, while peasants feared increased exploitation under the new lord and many fled across to the neighboring domains. Yamauchi Kazutoyo came in with only 158 mounted men, and had to petition bakufu for help in pacifying his new domain. This was achieved by "ruse and violence ... Two boatloads containing 273 heads were sent to Tokugawa headquarters to demonstrate Yamauchi efficiency, and another 73 dissidents were crucified on the beach."[1]

List of daimyōsEdit

  1. Kazutoyo
  2. Tadayoshi
  3. Tadatoyo
  4. Toyomasa
  5. Toyofusa
  6. Toyotaka
  7. Toyotsune
  8. Toyonobu
  9. Toyochika
  10. Toyokazu
  11. Toyo'oki
  12. Toyosuke
  13. Toyoteru
  14. Toyoatsu
  15. Toyoshige
  16. Toyonori

Simplified genealogy of the Yamauchi daimyōs of TosaEdit

  • Yamauchi Moritoyo (1510 – c. 1559)
    •   I. Kazutoyo, 1st daimyō of Tosa (cr. 1601) (c. 1545 – 1605; r. 1601–1605)
    • Yasutoyo (1549-1625)
      •   II. Tadayoshi, 2nd daimyō of Tosa (1592–1665; r. 1605–1656)
        •   III. Tadatoyo, 3rd daimyō of Tosa (1609–1669; r. 1656–1669)
          •   IV. Toyomasa, 4th daimyō of Tosa (1641–1700; r. 1669–1700).
      • Fukao Shigemasa (1598–1672). Adopted into the Fukao family
        • Fukao Shigeteru
          • Fukao Shigenao
            • Yamauchi Tadashige (1682–1721)
              •   VIII. Toyonobu, 8th daimyō of Tosa (1712–1768; r. 1725–1767)
                •   IX. Toyochika, 9th daimyō of Tosa (1750–1789; r. 1768–1789)
                  •   X. Toyokazu, 10th daimyō of Tosa (1773–1825; r. 1789–1808)
                    •   XI. Toyoaki, 11th daimyō of Tosa (1793–1809; r. 1808–1809).
                    •   XII. Toyosuke, 12th daimyō of Tosa (1794–1872; r. 1809–1843)
                      •   XIII. Toyoteru, 13th daimyō of Tosa (1815–1848; r. 1843–1848)
                      •   XIV. Toyoatsu, 14th daimyō of Tosa (1824–1848; r. 1848)
                      •   XVI. Toyonori, 16th daimyō, 16th family head, 1st Marquess (1846–1886; r. 1859–1869; Governor of Tosa 1869–1871; Marquess: 1884)
                        • XVII. Toyokage, 2nd Marquess, 17th family head (1875–1957; 2nd Marquess 1886–1947; 17th family head 1886–1957)
                        • Toyoshizu, 1st Baron Yamauchi (cr. 1906) (1883–1937)
                          • XVIII. Toyoaki, 18th family head (1912–2003; 18th family head 1957–2003)
                            • XIX. Toyokoto, 19th family head (b. 1940 ; 19th family head 2003– )
                              • Toyohiro (b. 1978)
                              • Toyonao (b. 1979)
                    • Toyoakira (1802–1859)
                      •   XV. Toyoshige, 15th Lord of Tosa (1827–1872; r. 1849–1859)
      • Kazutada (1600–1663)
        • Kazutoshi (1649–1675)
          •   V.Toyofusa, 5th daimyō of Tosa (1672–1706; r. 1700–1706)
          •   VI. Toyotaka, 6th daimyō of Tosa (1673–1720; r. 1706–1720)
            •   VII. Toyotsune, 7th daimyō of Tosa (1711–1725; r. 1720–1725).


See alsoEdit


  1. ^ a b M. B. Jensen, The making of modern Japan, (Harvard University Press, 2002), pp. 51–52
  2. ^ Yamachi genealogy