The Matsuyama Domain was a feudal domain in Japan during the Edo period, located in what is now Ehime Prefecture on the island of Shikoku. It was ruled by the Matsudaira clan, a branch of the powerful Tokugawa shogunate. The domain was known for its rich agricultural land and strategic coastal position. The capital of the Matsuyama Domain was Matsuyama Castle, which served as a political and military center. The domain played a significant role in local governance and culture, contributing to the development of the region's economy and infrastructure during the Edo period.