Saga Domain

Saga Domain (佐賀藩, Saga-han) was a Japanese domain of the Edo period Tokugawa Shogunate. It encompassed most of what are now Saga and Nagasaki Prefectures and was ruled from Saga Castle in what is now the urban center of the city of Saga. It was ruled through its history by the tozama daimyō Nabeshima clan. The domain was also referred to as Hizen Domain (肥前藩) after its location in Hizen Province or Nabeshima Domain (鍋島藩) after its ruling clan. The domain played a significant role in the Meiji Restoration.

Though the Dutch and Chinese trading posts in Nagasaki were overseen directly by officials of the Tokugawa shogunate, the domain was largely responsible for the military defense of the city and the port.