Azuma-asobi is a fairly long suite that needs approximately 30 minutes to be completed, which is classified into the Kuniburi no Utamai (native-style songs and dances based on the music of ancient Japan), a type of gagaku (Japanese Imperial Court music).
東遊（あずまあそび）は、雅楽の国風歌舞に類される、演奏時間は30分程度かかる、かなり長い組曲である。