The festival is centered around a play performance about a princess seeking revenge on a warrior for killing her father. She tries to deceive him and kill him with magic but he discovers her secret. The story ends with her being chased away by the warrior and we never know how the tale ends. (The Japanese love a good mystery.)
6 villages take turns putting on the performance and the most important part of the whole production is the stage design and how the stage can move to create new scenes. 'Yama' means 'prop' and 'age' (ah-geh) means movement. No one actually cares about the story line so long as the stage design is constantly shifting and exciting.
Oh, and one of the performers was introduced to me by the Girl Scout leaders because she is also a Girl Scout.