The Chōshū Domain was a feudal domain in Japan during the Edo period, located in the western part of Honshu. It was centered around present-day Yamaguchi Prefecture and was known for its strategic location and rich resources. The domain played a significant role in the political landscape of Japan, particularly during the late Edo period. Chōshū was influential in the movement to overthrow the Tokugawa shogunate, contributing to the rise of the Meiji Restoration. The domain was home to notable figures such as Kido Takayoshi and Saigo Takamori, who were key players in Japan's modernization efforts.