Basically, a chinichi (a specific day on which a heavenly body exerts an influence on the Earth) is determined based on the movements of the celestial bodies—such as the Big Dipper, Kuyo (the nine primary celestial beings), the twelve signs of the zodiac, nijunanashuku (twenty-seven mansions of the Chinese constellation) or nijuhachishuku (twenty-eight mansions of the Chinese constellation)—and the rotation of what were known as the "seven luminaries", and if Kyo (bad fortune) was predicted, the gods of the star in question were enshrined to bring good fortune.
基本的に、北斗七星・九曜・十二宮・二十七宿または二十八宿などの天体の動きや七曜の曜日の巡りによってその直日を定め、それが凶であった場合は、その星の神々を祀る事によって運勢を好転させようとする。