What is "kaizhou"

Kaizhou or Kai Prefecture may refer to:

• Kaizhou, a former prefecture in roughly modern Kai County, Chongqing, China
• Kaizhou, a former prefecture in roughly modern Kaiyang County, Guiyang, China
• Kaizhou, a former prefecture in roughly modern Fengcheng, Liaoning, China
• Kaizhou, a former prefecture in roughly modern Puyang County, Henan, China