In Rakkei hoyo, the Buddha statue as the honzon (principal image of Buddha) (or Mandala (a diagram that depicts Buddhist deities according to certain geometric formats and illustrates the Buddhist world view) and so on) is enshrined, and Kaigen hoyo (Eye-opening ceremony) is held as a ceremony to put the spirit into the honzon in order to celebrate the completion of the work, or to pray to and congratulate the Buddha, the founder of the religious sect or the ancestors related to the temple as it stands.
落慶法要では、本尊である仏像（または曼荼羅など）を安置し、本尊に魂を入れる儀式として開眼法要を行い、その工事の完成を祝い仏や宗祖、またはその寺院に機縁する祖先などに表白（ひょうびゃく）し、慶賀讃嘆するのが常となっている。