Concerning the contents of the total of six volumes, when the order was Heaven, Earth, East, South, West, and North, the first volume of Heaven described the shift of the tone seen in the Chinese (the ancient kango [words of Chinese origin]) as well as the principle of the four tones, while in the volume of Earth described the format of the poetry and materials to be depicted.
全六巻の内容は、天・地・東・南・西・北の順で見たとき、冒頭の天巻では中国語（古代漢語）に見られる声調変化、四声の原理を説き、地巻では詩の形式や描くべき題材について述べる。