After Heiankyo dairi was burned down in 960, it suffered several fires, and when satodairi (a temporary palace) became available, the emperor spent most of his time there, so the significance of the dairi was diminished.
平安京内裏は960年（天徳4年）火災で全焼したあと、幾度も火災に見舞われ、やがて里内裏が現れてくると天皇はもっぱらそちらに常住するようになり、内裏の意義は低下してくる。