The fundamental knowledge of Onmyodo and the preliminary preparation for divination, such as the explanation about the rivalry of gogyo based on the philosophy of inyogogyo (the cosmic dual forces (yin and yang) and the five elements (metal, wood, water, fire and earth) in Chinese cosmology), is explained in Chapters 6 to 19.
第六章から第十九章は陰陽五行による五行の相剋の説明といったように、陰陽道における基礎知識や占うにあたっての前準備を記してある。