The Tosa Domain was a historical feudal domain located in what is now Kochi Prefecture on the island of Shikoku, Japan. It was established during the Edo period and was ruled by the Yamauchi clan. The domain was known for its rich natural resources, including forests and rivers, which contributed to its economy. The Tosa Domain played a significant role in the political landscape of Japan during the late Edo period and the early Meiji Restoration. It was a center for the Sakamoto Ryoma, a prominent figure in the movement to overthrow the Tokugawa shogunate. The domain's influence helped shape modern Japan's transition from feudalism to a more centralized government.