Tosa Domain


The Tosa Domain was a feudal domain in Tosa Province of Japan 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". With the ultimate replacement of all domains with prefectures in 1871, Kōchi domain became Kōchi prefecture.

Ashikaga and Azuchi–Momoyama periods

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 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.
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."

List of ''daimyōs''

  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 Tosa