Kinpa Palace (金波宮), the Goldenwave Palace, is the the royal palace of the Kingdom of Kei. It stands on top of Mt. Gyouten in Gyouten, the capital of Ei Province and all of Kei.
It is where the ruler of Kei and the Kirin reside. In the anime, it is mentioned that there are at least thirty-two pavilions available for the the monarch to sleep in.