It structure is after "Kokin Wakashu" (A Collection of Ancient and Modern Japanese Poetry), and Volume 1 contains poems of four seasons (spring, summer, autumn, and winter) and Volume 2 contains Zouka (other poetry).
『古今和歌集』にならった構成で、上巻に春夏秋冬の四季の歌、下巻に雑歌を入れている。