The stage design used today is inspired by the kagura-den, maintaining the connection with the audience by having the stage opened on three sides. The actors are coming to the stage through a wooden bridge (hashi-gakari) that connects the stage to the "mirror room" (kagami-no-ma), the place where the actors are preparing their entrance.
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/7.1
Shutter Speed: 1/50s
ISO Sensitivity: ISO 200