Jōzai Domain
| Jōzai Domain 請西藩  | |
|---|---|
| under Tokugawa shogunate Japan | |
| 1825–1871 | |
| Capital | Kaifuchi jin'ya (1825–50) Jōzai jin'ya (1850–68) Sakurai jin'ya (1868–71)  | 
| • Type | Daimyō | 
| Historical era | Edo period | 
• Established   | 1825 | 
• Disestablished   | 1871 | 
| Today part of | part of Chiba Prefecture | 
Jōzai Domain (請西藩, Jōzai-han) was a feudal domain under the Tokugawa shogunate of Edo period Japan, located in Kazusa Province (modern-day Chiba Prefecture), Japan. The domain was centered on Manube jin’ya, in what is now the city of Kisarazu, Chiba. It was ruled for the entirety of its history by a branch of the Mizuno clan. Relatively small in size, it played an important role at the end of its existence, during the Boshin War of the Meiji Restoration.