The Okayama Domain was a historical feudal domain in Japan during the Edo period, located in what is now Okayama Prefecture. It was ruled by the Mizuno clan and was known for its agricultural productivity, particularly rice cultivation. The domain played a significant role in regional politics and economy during its time. The capital of the Okayama Domain was Okayama Castle, a prominent structure that served as the seat of power for the ruling clan. The domain was also famous for its cultural contributions, including the development of traditional crafts and the promotion of arts, which reflected the prosperity of the region.