Azuma-asobi began to be performed at Kamo-sai Festival from December 889, and this meant the folk music and dance from the eastern provinces became a ritual performance in the capital city.
寛平元年11月から賀茂祭で東遊がおこなわれ、東国の民間歌舞が都の祭祀の歌舞となったことになる。