Threshold into the Theatre
The approach to Karaza is by a taiko-bashi (a half drum shaped bridge) symbolizing ones departure from the world of reality. People crossing the bridge become conscious of entering an extraordinary fictional place. The bridge functions as a threshold, in a Japanese house you have a shiki (threshold) at the entrance to signify a separation of worlds. Without this, you would walk into a different world, but one which has not been distinguished from regular public space.