Since the hall stands just in front of the Nanmon (South Gate), it is easily mistaken as “Haiden” or worship hall. The 2 bays to the east are called “Heiden”, and the western 3 bays are called “Buden”. Heiden is a place where offerings from the emperor are placed temporarily, and is distinguished from Buden by its coffered ceiling. Buden is where traditional music and dance of the Imperial Court are offered, and is also used as a place for ceremonial music and dance on rainy days.